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Journal articles on the topic '\nHigh performance liquid chromatography with diode array detection (HPLC- DAD)'

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Published: 24 April 2022

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1

Magiera, Sylwia, Aleksanda Piwowarczyk, and Anna Węgrzyn. "A study of the enantiospecific degradation of ibuprofen in model aqueous samples using LLME-HPLC-DAD." Analytical Methods 8, no. 43 (2016): 7789–99. http://dx.doi.org/10.1039/c6ay02670b.

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Liquid–liquid microextraction (LLME) by high-performance liquid chromatography-diode array detection (HPLC-DAD) is a simple, rapid, efficient and environmentally friendly method that was developed to determine enantiomers of ibuprofen in aqueous environmental samples.

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2

Liu, Qian, Hai-Long Wu, Zhi Liu, et al. "Chemometrics-assisted HPLC-DAD as a rapid and interference-free strategy for simultaneous determination of 17 polyphenols in raw propolis." Analytical Methods 10, no. 46 (2018): 5577–88. http://dx.doi.org/10.1039/c8ay01986j.

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A methodology for simultaneously measuring seventeen polyphenols in six Chinese raw propolis samples by using chemometrics-assisted high performance liquid chromatography-diode array detection (HPLC-DAD) was developed and validated.

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3

Xiao, Ping, Jianwei Chen, Xiang Li, and Yayun Chen. "Ultrasound-assisted extraction coupled with SPE-HPLC-DAD for the determination of three bioactive phenylpropanoids from Radix Isatidis." Anal. Methods 6, no. 18 (2014): 7547–53. http://dx.doi.org/10.1039/c4ay00724g.

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This study demonstrated a reversed-phase high performance liquid chromatography (RP-HPLC) with photo-diode array detection (DAD) method for simultaneous determination of three phenylpropanoids including syringin, clemastanin B and indigoticoside A in Radix Isatidis.

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4

Abbaspour, Maryam, Mir Ali Farajzadeh, Saeed Mohammad Sorouraddin, and Ali Mohebbi. "Monitoring of nine pesticides in different cereal flour samples with high performance liquid chromatography-diode array detection." Analytical Methods 11, no. 31 (2019): 4022–33. http://dx.doi.org/10.1039/c9ay00935c.

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Neng, N. R., та J. M. F. Nogueira. "Monitoring trace levels of hydroxy aromatic compounds in urine matrices by bar adsorptive microextraction (BAμE)". Analytical Methods 9, № 36 (2017): 5260–65. http://dx.doi.org/10.1039/c7ay01410d.

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In this study, the enhancement for trace analysis of hydroxy aromatic compounds (HACs), such as phenol, hydroquinone, catechol and resorcinol, in urine matrices is proposed using bar adsorptive microextraction combined with micro-liquid desorption followed by high-performance liquid chromatography with diode array detection (BAμE-μLD/HPLC-DAD).

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Tuzimski, Tomasz. "Determination of Pesticides in Water Samples from the Wieprz-Krzna Canal in the czysko-Wodawskie Lake District of Southeastern Poland by Thin-Layer Chromatography with Diode Array Scanning and High-Performance Column Liquid Chromatography with Diode Array Detection." Journal of AOAC INTERNATIONAL 91, no. 5 (2008): 1203–9. http://dx.doi.org/10.1093/jaoac/91.5.1203.

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Abstract High-performance thin-layer chromatography with diode array scanning (TLC-DAD) and high-performance column liquid chromatography with a diode array detector (HPLC-DAD) were used to screen water samples for pesticides. Atrazine, clofentezine, chlorfenvinphos, hexaflumuron, terbuthylazine, lenacyl, neburon, bitertanol, and metamitron were enriched from canal water samples by solid-phase extraction (SPE) on octadecyl silane (C18)/styrene-divinylbenzene-1, C18, C18 Polar Plus, and cyanopropyl (CN) cartridges. Recovery rates were high for all extraction materials except CN, for which value

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Veizerová, L., J. Piešťanský, K. Maráková, et al. "Comparison of column-coupled electrophoresis with liquid chromatography methods in food analysis of quinine." Acta Facultatis Pharmaceuticae Universitatis Comenianae 59, no. 1 (2012): 67–80. http://dx.doi.org/10.2478/v10219-012-0011-y.

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Comparison of column-coupled electrophoresis with liquid chromatography methods in food analysis of quinineComparison of column-coupled electrophoresis with liquid chromatography methods in food analysis of quinine (QUI) is presented in this work. The capillary isotachophoresis (CITP) on-line coupled with capillary zone electrophoresis (CZE) and hyphenated with fibre-based spectrophotometric diode array detection (DAD) was compared with, (i) high performance liquid chromatography (HPLC) method with DAD detection, and (ii) HPLC method with fluorescence detection (FD). These methods were compare

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Tao, Yanyan, Jianguang Luo, Yuanyuan Lu, Deran Xu, Zhiguo Hou, and Lingyi Kong. "Rapid Identification of two Species of Peucedanum by High-Performance Liquid Chromatography-Diode Array Detection-Electrospray Ionization Tandem Mass Spectrometry." Natural Product Communications 4, no. 8 (2009): 1934578X0900400. http://dx.doi.org/10.1177/1934578x0900400812.

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The fragmentation behaviors of the angular- and linear-type coumarins from Peucedanum praeruptorum Dunn and P. decursivum (Miq.) Maxim were simultaneously investigated by HPLC-DAD/ESI-MSn. For more structural identification, the fragment ions were analyzed and some possible fragmentation pathways were proposed. Different positions and numbers of the substituent also led to different fragment behaviors. Two types of coumarins from P. praeruptorum and P. decursivum were structurally elucidated by these techniques. In addition, UV spectra were applied to support the MS analysis. This is the first

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Ragab, Marwa A. A., Mohamed H. Abdel-Hay, Hytham M. Ahmed, and Sara M. Mohyeldin. "Determination of Ibuprofen and Phenylephrine in Tablets by High-Performance Thin Layer Chromatography and in Plasma by High-Performance Liquid Chromatography with Diode Array Detection." Journal of Chromatographic Science 57, no. 7 (2019): 592–99. http://dx.doi.org/10.1093/chromsci/bmz031.

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Abstract Two chromatographic methods (high performance thin layer chromatography (HPTLC) and high performance liquid chromatography–diode array detector (HPLC-DAD)), were addressed for the analysis of a mixture consisted of phenylephrine hydrochloride and ibuprofen in two forms bulk and their combined dosage form. This binary mixture is considered to be a challenging one as the two drugs differ greatly in their chemical and physical properties. Not only this affects their simultaneous analysis, but also hinders their simultaneous extraction from biological fluids as plasma. That is the reason

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Mohammadzaheri, Reza, Mehdi Ansari Dogaheh, Maryam Kazemipour, and Kambiz Soltaninejad. "Optimization and Validation of a novel Nebulizer-assisted Liquid Phase Microextraction Followed by HPLC-DAD for Diazinon Analysis in Plasma Samples." International Journal of Medical Toxicology and Forensic Medicine 9, no. 4 (2019): 221–32. http://dx.doi.org/10.32598/ijmtfm.v9i4.26167.

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Background: Diazinon is among the most prevalently used broad-spectrum organophosphates insecticides. Diazinon toxicity depends on its blood concentration. The current study aimed to extract and determine diazinon in plasma samples using a new Nebulizer -Assisted Liquid-Phase Microextraction followed by High-Performance Liquid Chromatography with Diode-Array Detection (NALPME-HPLC-DAD).Methods: Several effective parameters, including the type and volume of extracting solvent, pH, surfactant, salt amount, and nebulizing, were evaluated and optimized to find the best condition for the extraction

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11

Szewczyńska, Małgorzata, and Małgorzata Pośniak. "Doxorubicin hydrochloride. Determination in workplace air with high performance liquid chromatography." Podstawy i Metody Oceny Środowiska Pracy 34, no. 2(96) (2018): 115–31. http://dx.doi.org/10.5604/01.3001.0012.1025.

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This article presents a method for measuring doxorubicin hydrochloride in workplace air with HPLC with diode array detector (DAD). The method is based on adsorption inhalable fraction of doxorubicin hydrochloride aerosol on glass fiber filter, desperation with water, and chromatographic analysis. The analysis was performed in reverse phase (mobile phase – 0.05 mol/L hydrophosphate disodum and acetonitrile (65:35) with pH – 3 with 0.5 mL/L triethylamine) on C18 column. The measurement range was 0.06 – 1 μg/m3 for 4800-L air sample. The limit of detection (LOD) was 0,0005 μg/ml and the limit of

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12

Aksu Dönmez, Özlem, Şule Dinç-Zor, Bürge Aşçı, and Abdürrezzak E. Bozdoğan. "Quantitative Analysis of Food Additives in a Beverage using High Performance Liquid Chromatography and Diode Array Detection Coupled with Chemometrics." Journal of AOAC INTERNATIONAL 103, no. 3 (2020): 779–83. http://dx.doi.org/10.1093/jaocint/qsz009.

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Abstract Background In many countries, the levels of synthetic food additives causing harm to humans have been determined and their use has been controlled by legal regulations. Sensitive, accurate and low-cost analysis methods are required for food additive determination. Objective In this study, a fast high performance liquid chromatography-diode array detection (HPLC-DAD) analytical methodology for quantification of sodium benzoate, potassium sorbate, ponceau 4R, and carmoisine in a beverage was proposed. Methods Partial least squares (PLS) and principal component regression (PCR) multivari

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13

Chellouai, Z., S. Zatout, M. Benhabib, A. Abed, R. Moussaoui, and A. Messaoudi. "Creatinine determination in human plasma by reversed-phase high-performance liquid chromatography–diode-array detection (HPLC–DAD)." Clinical Biochemistry 47, no. 9 (2014): 768–69. http://dx.doi.org/10.1016/j.clinbiochem.2014.04.039.

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14

Seo, Chang-Seob, and Kwang-Hoon Song. "Phytochemical Characterization for Quality Control of Phyllostachys pubescens Leaves Using High-Performance Liquid Chromatography Coupled with Diode Array Detector and Tandem Mass Detector." Plants 11, no. 1 (2021): 50. http://dx.doi.org/10.3390/plants11010050.

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Phyllostachys pubescens leaves are cultivated in a number of Asian countries and have been used for antipyretic and diuretic effects since ancient times, especially in Korea. The purpose of this study was to develop and validate of analytical method for quality control of P. pubescens leaves using high-performance liquid chromatography with diode array detector (HPLC–DAD) and liquid chromatography with tandem mass spectrometry (LC–MS/MS) detection. HPLC–DAD analysis was conducted with a Gemini C18 column, and distilled water–acetonitrile (both with 0.1% (v/v) formic acid) mobile-phase system.

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15

Zhu, Yanqin, Qinhong Yin, and Yaling Yang. "A comparative study of HPLC-DAD and UPLC-UV methods for simultaneous determination of 11 polyphenols in Moringa oleifera leaves." Tropical Journal of Pharmaceutical Research 20, no. 11 (2021): 2371–79. http://dx.doi.org/10.4314/tjpr.v20i11.20.

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Purpose: To develop, validate and compare two chromatographic methods - high performance liquid chromatography with diode array detector ((HPLC-DAD) and high performance liquid chromatography with ultraviolet detection (UPLC-UV) for the effective analysis of polyphenols in Moringa oleifera leaves.Methods: HPLC-DAD and UPLC-UV methods were applied for the accurate determination of eleven major polyphenols in Moringa oleifera leaves. The chromatographic conditions of the eleven polyphenols was determined on two C18 column by gradient elution with 0.5 % phosphoric acid solution -acetonitrile as t

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16

Giovannetti, Rita, Leila Alibabaei, Marco Zannotti, Stefano Ferraro, and Laura Petetta. "HPLC-DAD-ESI/MS Identification of Light Harvesting and Light Screening Pigments in the Lake Sediments at Edmonson Point." Scientific World Journal 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/741906.

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The composition of sedimentary pigments in the Antarctic lake at Edmonson Point has been investigated and compared with the aim to provide a useful analytical method for pigments separation and identification, providing reference data for future assessment of possible changes in environmental conditions. Reversed phase high performance liquid chromatography (HPLC) with electrospray-mass spectrometry (ESI-MS) detection and diode array detection (DAD) has been used to identify light screening and light harvesting pigments. The results are discussed in terms of local environmental conditions.

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17

Maham, Mehdi, Vahid Kiarostami, Syed Waqif-Husain, and Malihe Khoeini Sharifabadi. "Analysis of chlorpheniramine in human urine samples using dispersive liquid-liquid microextraction combined with high-performance liquid chromatography." Brazilian Journal of Pharmaceutical Sciences 50, no. 3 (2014): 551–57. http://dx.doi.org/10.1590/s1984-82502014000300014.

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A simple and environmentally friendly microextraction technique was used for determination of chlorpheniramine (CPM), an antihistamine drug, in human urine samples using dispersive liquid-liquid microextraction (DLLME) followed by high performance liquid chromatography with diode array detection (HPLC-DAD). In this extraction technique, an appropriate mixture of acetonitrile (disperser solvent) and carbon tetrachloride (extraction solvent) was rapidly injected into the urine sample containing the target analyte. Tiny droplets of extractant were formed and dispersed into the sample solution and

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18

Szewczyńska, Małgorzata, and Małgorzata Pośniak. "Docetaxel. Determination in workplace air with high performance liquid chromatography." Podstawy i Metody Oceny Środowiska Pracy 34, no. 2(96) (2018): 145–59. http://dx.doi.org/10.5604/01.3001.0012.0763.

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Docetaxel (DCT) is a plant derived cytotoxic from taxane family - mitosis inhibitors. It is used in the treatment of breast, lung and prostate cancer, squamous cell carcinoma of the head and neck, and gastric adenoma. Docetaxel is a highly flammable liquid and health-threatening substance classified as mutagenicity category 2 and reproductive toxicity category 1B. This paper presents a method for measuring docetaxel in the workplace air with HPLC with diode array detector (DAD). The method is based on the adsorption of inhalable fraction of docetaxel aerosol on glass fiber filter, desorption w

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19

He, Yi, Jing Lu, Fengyan He, et al. "Determination of Illegally Used Chemical Dyes in the Chinese Herbal Medicine “Red Flower Oil”." Journal of AOAC INTERNATIONAL 105, no. 2 (2021): 587–92. http://dx.doi.org/10.1093/jaoacint/qsab142.

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Abstract Background Red flower oil is a group of herbal medicinal liniments widely used in China and Southeast Asia. The color of red flower oil is adjusted to red or brownish-red by adding natural dyes. Objective The objective of this study is to identify and quantify the synthetic dyes illegally used in red flower oil. Methods Thirty-two batches of red flower oil (from nine manufacturers) were collected from different cities in China. High-performance liquid chromatography-diode array detection-mass spectrometry (HPLC–DAD–MS) analysis was performed to identify the chemical dyes in the sample

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20

Barichello, Marcia M., Denise Bohrer, Carine Viana, Leandro M. Carvalho, and Paulo C. Nascimento. "Determination of Polycyclic Aromatic Hydrocarbons in Commercial Parenteral Formulations and Medications Using High-Performance Liquid Chromatography with Diode Array Detection." Journal of AOAC INTERNATIONAL 100, no. 4 (2017): 1070–76. http://dx.doi.org/10.5740/jaoacint.16-0342.

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Abstract HPLC coupled to UV diode array detection (DAD) is proposed for the determination of polycyclic aromatic hydrocarbons (PAHs) in pharmaceutical products for parenteral administration. Because rubber is a possible source of PAHs for these products, samples stored in containers with rubber parts were selected for the analysis. The basis for method optimization was EPA Method 8310, which determines 16 priority PAHs in ground water and wastewater by HPLC using both UV and fluorescence detection. Using DAD, two channels were selected for detection, with one operating at 254 nm for the detect

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Fernández, P., C. Vázquez, L. Morales, and A. M. Bermejo. "Analysis of opiates, cocaine and metabolites in urine by high-performance liquid chromatography with diode array detection (HPLC-DAD)." Journal of Applied Toxicology 25, no. 3 (2005): 200–204. http://dx.doi.org/10.1002/jat.1052.

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22

Qin, Kunming, Hao Cai, Lijuan Zheng, et al. "Development of HPLC Fingerprint for Quality Assessment of Bulbus Lilii." Natural Product Communications 8, no. 10 (2013): 1934578X1300801. http://dx.doi.org/10.1177/1934578x1300801028.

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In this study, a simple, sensitive and reliable fingerprint analysis method by high-performance liquid chromatography coupled with diode array detection (HPLC-DAD) was developed for quality analysis of Bulbus Lilii, which is a famous traditional Chinese medicine and widely used as a restorative food. Then the developed method was subsequently applied to analyse 16 samples collected or purchased from different origins. Twelve common fingerprint peaks, including four definitely identified peaks, were found in total, and were involved for further characterisation and quality evaluation of Bulbus

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Huang, Gui Qi, She Ying Dong, Zhen Yang, and Ting Lin Huang. "Simultaneous Determination of Four Plant Hormones in Soil by Ultrasound-Assisted Ionic Liquid Based Dispersive Liquid-Liquid Microextraction." Applied Mechanics and Materials 675-677 (October 2014): 181–84. http://dx.doi.org/10.4028/www.scientific.net/amm.675-677.181.

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An ultrasound-assisted ionic liquid based dispersive liquid-liquid microextraction (UA-IL-DLLME) was developed for the determination of four plant hormones (6-benzyladenine (6-BA), kinetin (6-KT), 2, 4-dichlorophenoxy acetic acid (2, 4-D) and uniconazole (UN)) in soil, using high performance liquid chromatography (HPLC)-diode array detection (DAD). Several important parameters including the type and volume of extraction solvent, the volume of disperser solvent, ultrasound time, pH of the solution and salt effect were studied and optimized. Under optimum conditions, the limits of detections (LO

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Zhu, Yanqin, Ping Du, Shaojun Huang, Qinhong Yin, and Yaling Yang. "Quality assessment of Moringa seed shells based on fingerprinting using HPLC-DAD." Acta Chromatographica 32, no. 1 (2020): 28–33. http://dx.doi.org/10.1556/1326.2019.00545.

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A fingerprint analysis method was established for the quality control of Moringa seed shells by high-performance liquid chromatography with diode array detection (HPLC–DAD). The HPLC–DAD separation was performed on a Thermo Hypersil Gold C18 (4.6 mm × 250 mm, 5 μm) column by gradient elution with acetonitrile–water as mobile phase. The fingerprint of Moringa seed shells was established with good precision, reproducibility, and stability obtaining within 60 min, and 13 common peaks in the fingerprint were designed. Similarity analysis, principal component analysis (PCA), and hierarchical cluste

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Andrade, Roseane Teixeira, Ricky Cássio Santos da Silva, Arnaldo César Pereira, and Keyller Bastos Borges. "Self-assembly pipette tip-based cigarette filters for micro-solid phase extraction of ketoconazole cis-enantiomers in urine samples followed by high-performance liquid chromatography/diode array detection." Analytical Methods 7, no. 17 (2015): 7270–79. http://dx.doi.org/10.1039/c5ay00468c.

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Tang, Huacheng, Jiangling Qu, Dongmei Cao, Weisong Wang, and Yuhao Lou. "Determination of fomesafen and quizalofop-p-ethyl in beans using modified QuEChERS-HPLC-DAD." Quality Assurance and Safety of Crops & Foods 12, no. 3 (2020): 35–45. http://dx.doi.org/10.15586/qas.v12i3.660.

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An improved quick, easy, cheap, effective, rugged, and safe (QuEChERS) method combined with high-performance liquid chromatography (HPLC) coupled to diode array detection was established for the determination of fomesafen and quizalofop-p-ethyl in beans. It is simple and efficient and can be used in most laboratories. This method optimizes four chromatographic conditions, namely, mobile phase, mobile phase ratio, flow rate, and detection wavelength. The effects of extraction agent, extraction dose, extraction time, NaCl amount, and adsorbent on the pretreatment effect were studied. The recover

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Nuñez-Gómez, Vanesa, Nieves Baenas, Inma Navarro-González, et al. "Seasonal Variation of Health-Promoting Bioactives in Broccoli and Methyl-Jasmonate Pre-Harvest Treatments to Enhance Their Contents." Foods 9, no. 10 (2020): 1371. http://dx.doi.org/10.3390/foods9101371.

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Broccoli is a source of bioactive compounds that provide an important nutritional value. The content of these compounds can vary depending on agronomic and environmental conditions, as well as on elicitation. In this study, three crop trials were carried out to evaluate the effects of the cultivation season, the application of different dosages of methyl-jasmonate (MeJA) on the overall quality and on the total content of bioactive compounds of ‘Parthenon’ broccoli cultivated under the field conditions of southeastern Spain. Color parameters, chlorophyll content, total phenolic compounds, total

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Montesano, Domenico, Oriella Gennari, Carmen Festa, Franco Zollo, Serenella Seccia, and Stefania Albrizio. "A Simple HPLC-DAD Method for the Analysis of Melamine in Protein Supplements: Validation Using the Accuracy Profiles." Journal of Chemistry 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/239342.

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The study presents a fully validated simple high-performance liquid chromatography method with diode array detection (HPLC-DAD), able to accurately determine the melamine, fraudulently added, in protein supplements, commonly used from healthy adults to enhance exercise or sport performance. The validation strategy was intentionally oriented towards routine use and the reliability of the method rather than extreme performance. For this reason, validation by accuracy profile, including estimation of uncertainty, was chosen. This procedure, based on the concept of total error (bias + standard dev

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Qiu, Yue, Qing Zhang, Genrong Li, Mei Long, and Dong Xiang. "Determination of 12 acrylate compounds in plastic food contact materials via high performance liquid chromatography." E3S Web of Conferences 233 (2021): 02045. http://dx.doi.org/10.1051/e3sconf/202123302045.

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A high performance liquid chromatography (HPLC) method was used to determine 12 acrylate compounds in plastic food contact materials. The plastic food contact material samples were extracted by ultrasonic with methanol. The mixed solution of water and acetonitrile was used as mobile phase for gradient elution. The samples were separated by ZORBAX SB-AQ column (250 mm×4.6 mm, 5 μm), and analyzed by diode array detector (DAD). The results showed that under the optimal chromatographic conditions, the 12 acrylate compounds had good linear relationships in the range of 0.01-10.0 mg/L, the correlati

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Paul, Michael, and Johann Jauch. "Efficient Preparation of Incensole and Incensole Acetate, and Quantification of These Bioactive Diterpenes in Boswellia papyrifera by a RP-DAD-HPLC Method." Natural Product Communications 7, no. 3 (2012): 1934578X1200700. http://dx.doi.org/10.1177/1934578x1200700303.

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Incensole and incensole acetate, found in incense, are encouraging potent bioactive diterpenic cembrenoids, inhibiting Nuclear Factor-κB activation. Furthermore, incensole acetate elicits psycho-activity in mice by activating the TRPV3 channels in the brain. Starting from crude extracts of the incense species Boswellia papyrifera Hochst., a convenient procedure for the efficient large-scale synthesis of incensole and its acetate is presented. Additionally, a reversed-phase, diode-array-detection, high-performance liquid chromatography (RP-DAD-HPLC) method for the quantification of incensole an

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Chen, Jianping, Zhonggui Li, Ken Y. Z. Zheng, et al. "Chemical fingerprinting and quantitative analysis of two common Gleditsia sinensis fruits using HPLC-DAD." Acta Pharmaceutica 63, no. 4 (2013): 505–15. http://dx.doi.org/10.2478/acph-2013-0036.

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Abstract Gleditsiae Fructus Abnormalis and Gleditsiae Sinensis Fructus are obtained from different developmental stages of fruits from Gleditsia sinensis Lam. (Leguminosae). The possible interchangeable usage of the two fruits, however, has long been very controversial. Here, high performance liquid chromatography coupled with diode array detection was developed to explore their chemical fingerprinting profiles. Besides, the amounts of aglycones of saponin compounds, echinocystic acid and oleanolic acid in both fruits were quantified. The results indicated that there was no significant differe

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Wróblewski, Karol, Anna Petruczynik, Tomasz Tuzimski, et al. "Comparison of Various Chromatographic Systems for Analysis of Cytisine in Human Serum, Saliva and Pharmaceutical Formulation by HPLC with Diode Array, Fluorescence or Mass Spectrometry Detection." Molecules 24, no. 14 (2019): 2580. http://dx.doi.org/10.3390/molecules24142580.

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Background: Identification and quantitative determination of cytisine, especially in biological samples and pharmaceutical formulations, is still a difficult analytical task. Cytisine is an alkaloid with a small and very polar molecule. For this reason, it is very weakly retained on reversed phase (RP) stationary phases, such as commonly used alkyl-bonded phases. The very weak retention of cytisine causes it to be eluted together with the components of biological matrices. Objective: Comparison and evaluation of various chromatographic systems for analysis of cytisine in different matrices—ser

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Wróblewski, Karol, Małgorzata Szultka-Młyńska, Daria Janiszewska, Anna Petruczynik, and Bogusław Buszewski. "Development of the Validated Stability-Indicating Method for the Determination of Vortioxetine in Bulk and Pharmaceutical Formulation by HPLC-DAD, Stress Degradation Kinetics Studies and Detection of Degradation Products by LC-ESI-QTOF-MS." Molecules 27, no. 6 (2022): 1883. http://dx.doi.org/10.3390/molecules27061883.

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Vortioxetine (VOR) is a new antidepressant drug used to treat major depressive disorder. In this work, a novel, simple, rapid, accurate, precise, selective, stability-indicating, and fully validated high-performance liquid chromatography method with diode array detection (HPLC-DAD) was developed to determine VOR in bulk and pharmaceutical formulations. A Polar-RP column was used, with a mobile phase consisting of acetonitrile (ACN), methanol (MeOH), acetate buffer pH 3.5, and addition of diethylamine (DEA) in the isocratic elution mode. Assessing the stability of the VOR is fundamental to guar

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Nascimento, Yuri Mangueira, Lucas Silva Abreu, Ramon Leal Lima, et al. "Rapid Characterization of Triterpene Saponins from Zornia brasiliensis by HPLC-ESI-MS/MS." Molecules 24, no. 14 (2019): 2519. http://dx.doi.org/10.3390/molecules24142519.

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Zornia brasiliensis Vogel (Leguminosae) is a species popularly known in Brazil as “urinária”, “urinana”, and “carrapicho”, it is popularly used as a diuretic and in the treatment of venereal diseases. A specific methodology to obtain a saponin-enriched fraction and high-performance liquid chromatography coupled with diode array detection, ion trap mass spectrometry, and TOF-MS (HPLC-DAD-ESI-MS/MS) was applied for the analysis of triterpene saponins. The MS and MS/MS experiments were carried out by ionization in negative mode. Molecular mass and fragmentation data were used to support the struc

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Cui, Lizhi, Zhihao Ling, Josiah Poon, Simon K. Poon, Junbin Gao, and Paul Kwan. "A Decomposition Model for HPLC-DAD Data Set and Its Solution by Particle Swarm Optimization." Applied Computational Intelligence and Soft Computing 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/276741.

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This paper proposes a separation method, based on the model of Generalized Reference Curve Measurement and the algorithm of Particle Swarm Optimization (GRCM-PSO), for the High Performance Liquid Chromatography with Diode Array Detection (HPLC-DAD) data set. Firstly, initial parameters are generated to construct reference curves for the chromatogram peaks of the compounds based on its physical principle. Then, a General Reference Curve Measurement (GRCM) model is designed to transform these parameters to scalar values, which indicate the fitness for all parameters. Thirdly, rough solutions are

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Grahovac, Nada, Zorica Stojanovic, Snezana Kravic, et al. "Determination of residues of sulfonylurea herbicides in soil by using microwave-assisted extraction and high performance liquid chromatographic method." Chemical Industry 71, no. 4 (2017): 289–98. http://dx.doi.org/10.2298/hemind160224039g.

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A modified method for the analysis of nicosulfuron, rimsulfuron and prosulfuron was developed and validated by using microwave-assisted extraction (MAE) and ultra-performance liquid chromatography with diode array detection in the ultraviolet region (HPLC-UV-DAD). The most important experimental parameters of extraction procedure and HPLC-UV-DAD technique were optimised in respect to those sulfonylurea herbicides. High recoveries of the microwave-assisted extraction were obtained by using a dichloromethane?acetonitrile mixture (2:1 volume ratio) acidified with acetic acid (0.8 vol.%) with the

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Alrhia, Lobaina M., Issam Mohamad, and Sameer Mearouf. "Determination and validation of Tetracycline residues in Poultry by High Performance Liquid Chromatography - Diode Array Detector Technique." Al-Mustansiriyah Journal of Science 30, no. 3 (2019): 38. http://dx.doi.org/10.23851/mjs.v30i3.650.

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The aim of this research is separation and determination of trace Tetracycline residues in Poultry chest, thigh and liver using High Performance Liquid Chromatography - Diode Array Detector (HPLC-DAD), with a mobile phase mixture consisting of acetonitrile: methanol: oxalic acid (0.01M) (25:15:60) and chromatographic column C8. The study was done on 32 live poultry individuals. All individuals were injected in the chest by 1m of Tetracycline standard solutions, then slaughter for analysis throughout four successive days. The injection with 10×103 ppb of Tetracycline showed that the traces of T

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Nogueira, Raquel, Wagner Wollinger, Thaís Elias da Silva, et al. "Validation of a liquid chromatographic method for determination of related substances in a candidate certified reference material of captopril." Brazilian Journal of Pharmaceutical Sciences 47, no. 2 (2011): 351–62. http://dx.doi.org/10.1590/s1984-82502011000200016.

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This paper describes the validation of a reversed-phase high performance liquid chromatography method (RP-HPLC) with diode array detection (DAD) for determination of related substances (impurities from organic synthesis and degradation products) of captopril according to the Brazilian Pharmacopeia IV. The aim of this study was to guarantee the method accuracy for quantification of related substances, an essential requisite to determine, using the mass balance approach, the captopril content in the first Brazilian certified reference material (CRM) of an active pharmaceutical ingredient (API),

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Kujala, Tytti, Jyrki Loponen, and Kalevi Pihlaja. "Betalains and Phenolics in Red Beetroot (Beta vulgaris) Peel Extracts: Extraction and Characterisation." Zeitschrift für Naturforschung C 56, no. 5-6 (2001): 343–48. http://dx.doi.org/10.1515/znc-2001-5-604.

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The extraction of red beetroot (Beta vulgaris) peel betalains and phenolics was compared with two extraction methods and solvents. The content of total phenolics in the extracts was determined according to a modification of the Folin-Ciocalteu method and expressed as gallic acid equivalents (GAE). The profiles of extracts were analysed by high-performance liquid chromatography (HPLC). The compounds of beetroot peel extracted with 80% aqueous methanol were characterised from separated fractions using HPLC- diode array detection (HPLC-DAD) and HPLC- electrospray ionisation-mass spectrometry (HPL

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Chen, Fu-chao, Lin-hai Wang, Jun Guo, Xiao-ya Shi, and Bao-xia Fang. "Simultaneous Determination of Dexamethasone, Ondansetron, Granisetron, Tropisetron, and Azasetron in Infusion Samples by HPLC with DAD Detection." Journal of Analytical Methods in Chemistry 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/6749087.

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A simple and rapid high-performance liquid chromatography with diode array detector (HPLC-DAD) method has been developed and validated for simultaneous quantification of five antiemetic agents in infusion samples: dexamethasone, ondansetron, granisetron, tropisetron, and azasetron. The chromatographic separation was achieved on a Phenomenex C18column (4.6 mm × 150 mm, 5 μm) using acetonitrile-50 mM KH2PO4buffer-triethylamine (25 : 74 : 1; v/v; pH 4.0). Flow rate was 1.0 mL/min with a column temperature of 30°C. Validation of the method was made in terms of specificity, linearity, accuracy, and

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Silva, Carolina Moraes da, Luciana Guimarães Eiró, João Victor Silva-Silva, et al. "In vitro antileishmanial activity and phytochemical analysis of Casearia javitensis Kunth (Salicaceae)." Revista Fitos 14, no. 4 (2020): 528–37. http://dx.doi.org/10.32712/2446-4775.2020.950.

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The objective of this study was to carry out phytochemical analysis of the bark extract of Casearia javitensis and to evaluate its antipromastigote activity against Leishmania amazonensis. The ethanol extract (EE) was fractionated in open-column chromatography to obtain the hexane (FrHex), dichloromethane (FrDcm), ethyl acetate (FrAcOET) and methanol (FrMeOH) fractions. The EE and its fractions were analyzed by thin layer chromatography (TLC). FrDcm was analyzed in high performance liquid chromatography with diode array detection (HPLC-DAD). The antipromastigote assay of Leishmania amazonensis

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Silva, Carolina Moraes da, Luciana Guimarães Eiró, João Victor Silva-Silva, et al. "In vitro antileishmanial activity and phytochemical analysis of Casearia javitensis Kunth (Salicaceae)." Revista Fitos 14, no. 4 (2020): 528–37. http://dx.doi.org/10.32712/2446-4775.2020.950.

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The objective of this study was to carry out phytochemical analysis of the bark extract of Casearia javitensis and to evaluate its antipromastigote activity against Leishmania amazonensis. The ethanol extract (EE) was fractionated in open-column chromatography to obtain the hexane (FrHex), dichloromethane (FrDcm), ethyl acetate (FrAcOET) and methanol (FrMeOH) fractions. The EE and its fractions were analyzed by thin layer chromatography (TLC). FrDcm was analyzed in high performance liquid chromatography with diode array detection (HPLC-DAD). The antipromastigote assay of Leishmania amazonensis

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Rosales-Castro, Martha, Rubén Francisco González-Laredo, Nuria Elizabeth Rocha-Guzmán, José Alberto Gallegos-Infante, María José Rivas-Arreola, and Joseph J. Karchesy. "Antioxidant activity of fractions from Quercus sideroxyla bark and identification of proanthocyanidins by HPLC-DAD and HPLC-MS." Holzforschung 66, no. 5 (2012): 577–84. http://dx.doi.org/10.1515/hf-2011-0157.

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Abstract The most active phenolics in Quercus sideroxyla Humb. & Bonpl. residual bark were identified and evaluated following a chromatographic fractionation. Bark powder was defatted with hexane and crude extract (CE) was obtained by extraction with aqueous acetone (70%). A liquid partition with ethyl acetate was performed to produce an organic extract (OE), which was subsequently purified by column chromatography (Toyopearl HW-40F, methanol), and resulted in six methanolic fractions (MF1 to MF6) and an oligomeric fraction (OLF) eluted with acetone 67%. Extraction yields, total phenolic a

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Ali, Hazim M. "Simultaneous Determination of Methyl Nicotinate and Three Salicylic Acid Derivatives in Pain Relief Spray Using HPLC–DAD." Separations 9, no. 4 (2022): 93. http://dx.doi.org/10.3390/separations9040093.

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For the first time, the high-performance liquid chromatography–diode array detector (HPLC–DAD) approach was operated for the simultaneous assessment of methyl nicotinate (MN), methyl salicylate (MS), ethyl salicylate (ES) and 2-hydroxyethyl salicylate (HES) in one pharmaceutical formulation. The limits of detection of MN, HES, MS and ES were found to be 0.0144, 0.0455, 0.0087 and 0.0061 μg/mL. The recovery percentages and relative standard deviations ranged from 93.48 to 102.12% and 0.301 to 6.341% for all active ingredients. Accordingly, the previously described data demonstrate the sensitivi

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Syukri, Daimon, Djaswir Darwis, and Adlis Santoni. "Major Anthocyanin Pigments in the Ficus padana Fruits: HPLC-DAD-ESI-MS Identification and Antioxidant Activity." Indonesian Journal of Chemistry 14, no. 3 (2014): 297–303. http://dx.doi.org/10.22146/ijc.21242.

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The anthocyanins in Ficus padana were extracted and identified by using high-performance liquid chromatography/diode array detection and electrospray ionization/mass spectrometry (HPLC-DAD-ESI-MS). The individual anthocyanins were identified by comparing between their mass spectral data and published data. The first compound (peak 1) was identify as a pelargonidin 3-(6”-p-coumarylglucoside)-5-(4”’-Malonylglucoside) and the second compound was identify as a pelargonidin 3-(6’’-Malonylglucoside). The second one is a major compound that taking up to 91% of the total anthocyanin content in F. pada

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Vlassa, Mihaela, Miuta FILIP, and Catalin DRAGOMIR. "Simultaneous quantifications of four purine derivatives biomarkers in cow milk by SPE HPLC-DAD." Czech Journal of Food Sciences 39, No. 2 (2021): 122–30. http://dx.doi.org/10.17221/297/2020-cjfs.

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In this study, simultaneous quantification of allantoin, uric acid, xanthine, and hypoxanthine in cow milk by solid phase extraction (SPE) and high performance liquid chromatography-diode array detection (HPLC-DAD) method was perform. Five different SPE cartridges were tested in order to evaluate the isolation of purine derivatives (PD) from cow milk. Chromatography was carried out on ODS-2 Hypersil column and 0.05 M (NH<sub>4</sub>)<sub>2</sub>HPO<sub>4</sub> buffer solution (pH = 7.76) as mobile phase. The HPLC-DAD validated method showed a linearity with

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Pawłowicz, Kamil, Dominika Ludowicz, Marta Karaźniewicz-Łada, Kamil Wdowiak, and Judyta Cielecka-Piontek. "Analysis of the Composition of Lyophilisates Obtained from Aloe arborescens Gel of Leaves of Different Ages from Controlled Crops." Molecules 26, no. 11 (2021): 3204. http://dx.doi.org/10.3390/molecules26113204.

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The aim of the study is to evaluate the composition of lyophilisates obtained from Aloe arborescens leaf gel at the age of one to four years. The leaves were obtained from controlled crops, which allowed to exclude environmental factors as variables. It was confirmed that the lyophilisates obtained from different years of Aloe arborescens leaf gel varied in chromatographic analyses in terms of aloin A and aloenin A content (high-performance liquid chromatography with diode-array detection HPLC-DAD, high-performance liquid chromatography with tandem mass spectrometric detection HPLC-MS/MS). Sim

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Bernardi, Tatiana, Olga Bortolini, Alessandro Massi, Gianni Sacchetti, Massimo Tacchini, and Carmela De Risi. "Exploring the Synergy Between HPTLC and HPLC-DAD for the Investigation of Wine-Making By-Products." Molecules 24, no. 19 (2019): 3416. http://dx.doi.org/10.3390/molecules24193416.

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Both environmental and economic issues are increasingly pushing for the revalorization of agri-food by-products, including those arising from wine industry. Wastes produced from wine-making processes are important sources of biologically active compounds, mainly phenolic acids and flavonoids, which could be re-used for several applications, for example as additive surrogates or new ingredients in foodstuffs and/or pharmaceuticals. Therefore, the development of methods aimed at isolating, characterizing and quantifying molecules present in winery by-products acquires considerable importance in

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Aires, Alfredo, and Rosa Carvalho. "Rapid Separation of Indole Glucosinolates in Roots of Chinese Cabbage (Brassica rapaSubsp. Pekinensis) by High-Performance Liquid Chromatography with Diode Array Detection." International Journal of Analytical Chemistry 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/5125329.

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Glucosinolates are a class of sulphur-containing plant compounds with diverse biological properties. They have been found exclusively in the Brassicaceae family plants and studied exhaustively in biosynthetic and application perspectives. The aim of this current study is to present a simple and updated method to quantify indole glucosinolate content in hairy root cultures of Chinese cabbage by HPLC-DAD-UV/Vis. Method validation controls were performed and recovery experiments were assayed. The data was statically treated and compared with published works. The current method allowed a feasible

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Ghinea, Ioana Otilia, Maria Daniela Ionica Mihaila, Giorgiana-Valentina Blaga (Costea), et al. "HPLC-DAD Polyphenolic Profiling and Antioxidant Activities of Sorghum bicolor during Germination." Agronomy 11, no. 3 (2021): 417. http://dx.doi.org/10.3390/agronomy11030417.

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The purpose of this study was to assess the suitability of the Romanian Albanus hybrid of Sorghum bicolor as a potential functional food ingredient. Ultrasound-assisted extraction in different solvents, together with spectrophotometric and chromatographic methods, was used to monitor the variation in total phenolic and flavonoid content and the antioxidant activity of raw sorghum grains before and during short germination periods (24, 36 and 48 h). The High-Performance Liquid Chromatography with Diode-Array Detection (HPLC-DAD) investigation of the extracts revealed that the ungerminated sorgh

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