Academic literature on the topic 'Limit of detection (LOD) and limit of quantification (LOQ)'

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Journal articles on the topic "Limit of detection (LOD) and limit of quantification (LOQ)"

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Ershadi, Saba, and Ali Shayanfar. "Are LOD and LOQ Reliable Parameters for Sensitivity Evaluation of Spectroscopic Methods?" Journal of AOAC INTERNATIONAL 101, no. 4 (2018): 1212–13. http://dx.doi.org/10.5740/jaoacint.17-0363.

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Abstract The limit of detection (LOD) and the limit of quantification (LOQ) are common parameters to assess the sensitivity of analytical methods. In this study, the LOD and LOQ of previously reported terbium sensitized analysis methods were calculated by different methods, and the results were compared with sensitivity parameters [lower limit of quantification (LLOQ)] of U.S. Food and Drug Administration guidelines. The details of the calibration curve and standard deviation of blank samples of three different terbium-sensitized luminescence methods for the quantification of mycophenolic acid
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Syahrir, Muhammad, Nurul Hidayat Aprilita, and Nuryono Nuryono. "VALIDASI METODE ANALISIS POLISIKLIK AROMATIK HIDROKARBON (PAH) DALAM SEDIMEN DI SEKITAR PANTAI MAKASSAR." Jurnal Kimia Terapan Indonesia 17, no. 1 (2015): 9–14. http://dx.doi.org/10.14203/jkti.v17i1.18.

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Validation of analysis method of PAH have been done in marine sediment of Macassar Coast by Gas Chromatography (GC-FID). Validation of method include: limit of detection (LoD), limit of quantification (LoQ) and linearity range. The results of validation method of 7 types PAHs (Naphtalene, Acenaphtene, Penanthrene, Fluoranthene, Pyrene, Benzo (a) Anthracene and perylene) give a linearity range between 0.5 to 20 ppm with an average linearity approaches a value of 1. LoD for Naphtalene; Acenaphthene; Penanthrene; Fluoranthene; Pyrene; Benzo (a) Anthracene; and Perylene are 3.541; 0.208; 1,736; 1.
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Islam, Nazmul, Md Omar Faruque, and Rausan Zamir. "Investigation of Sodium Benzoate and Potassium Sorbate in Anti-Diabetic Herbal Drugs." Journal of Applied Science & Process Engineering 9, no. 1 (2022): 1091–100. http://dx.doi.org/10.33736/jaspe.4544.2022.

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The objective of the study was to assess sodium benzoate and potassium sorbate in some anti-diabetic herbal drugs (ADHDs) collected from local markets using UV-Vis spectrophotometric method. Analytes were measured in bulk and finished drug formulations at 224 nm for Sodium benzoate and 254.5 nm for potassium sorbate. The calibration curve obeyed Beer’s law in the range of 0-40 ppm for sodium benzoate and 0-50 ppm for potassium sorbate and passed the goodness of fit evaluation. Limit of detection, LOD and limit of quantification, LOQ for sodium benzoate was 0.13 pm and 0.40 ppm respectively. Th
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Le Thi, Lien, Anh Bach Thuy, Khanh Cao Cong, Ha Tran Nguyen, and Hong Hao Le Thi. "Determination of crinamidine in dietary supplements by GC-MS/MS." Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam 1, no. 1 (2018): 3–7. http://dx.doi.org/10.47866/2615-9252/vjfc.48.

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The determination of crinamidine in dietary supplements content by mass spectrometry (GC-MS/MS) was developed and validated. The method was performed on the DB5MS column (30m x 0,25mm; 0,25 μm), in combination with the tandem mass spectrometry. The parameters of the method were evaluated for selectivity, calibration curve, accuracy, precision, limit of detection (LOD) and limit of quantification (LOQ). The calibration curve was highly linear (the coefficient of determination 0.9970) within the concentration range of 5ppm-50ppm. The recovery at three concentrat
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Parachalil, Drishya Rajan, Deirdre Commerford, Franck Bonnier, Igor Chourpa, Jennifer McIntyre, and Hugh J. Byrne. "Raman spectroscopy as a potential tool for label free therapeutic drug monitoring in human serum: the case of busulfan and methotrexate." Analyst 144, no. 17 (2019): 5207–14. http://dx.doi.org/10.1039/c9an00801b.

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A methodology is proposed, based on Raman spectroscopy coupled with multivariate analysis, to determine the Limit of Detection (LOD) and Limit of Quantification (LOQ) for therapeutic drug monitoring in human serum, using the examples of Busulfan and Methotrexate.
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Barros, G., D. García, S. Oviedo, M. Ramirez, A. Torres, and S. Chulze. "Deoxynivalenol and nivalenol analysis in soybean and soy flour." World Mycotoxin Journal 1, no. 3 (2008): 263–66. http://dx.doi.org/10.3920/wmj2008.1052.

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A rapid and accurate method of quantifying deoxynivalenol (DON) and nivalenol (NIV) in soybean and soy flour is described. The samples were extracted with acetonitrile:water (84:16, v/v) and cleaned through a solidphase extraction (SPE) column. The mycotoxins were separated, detected and quantified by reversed-phase high performance liquid chromatography (HPLC) with UV detection (220 nm) using water:methanol (88:12, v/v) as mobile phase. Characteristics of this in-house method such as accuracy, precision and detection and quantification limits were defined by means of a recovery test with spik
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Gowtham Reddy Cheruku, Sai Laasya Mithinti, and Purushotham Saidu. "UV Spectrophotometric Method Development and Validation of Esomeprazole in Bulk and Pharmaceutical Dosage Forms." International Journal of Research in Pharmaceutical Sciences 12, no. 3 (2021): 2286–90. http://dx.doi.org/10.26452/ijrps.v12i3.4855.

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The work discusses method development and validation. An uncomplicated, accurate, and straightforward method was developed for the drug Esomeprazole in bulk as well as Pharmaceutical dosage form. NaOH was used as the solvent. The maximum wavelength (ʎ max) for Esomeprazole was found to be 305nm. The validation was performed as per International Council for Harmonization of Technical Requirements for Pharmaceuticals for Human Use (ICH) guidelines for Accuracy linearity, precision, Limit of Detection (LOD) and Limit of Quantification (LOQ). Esomeprazole's recovery percentage (%) was 100.20%, res
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Jovanovic, Slobodan V., Thomas Zakharov, Hemendra Mulye, Duck Kim, and Kelly-Anne Fagan. "Determination of hydrazine at Ontario nuclear power plants." Analytical Methods 7, no. 23 (2015): 9825–34. http://dx.doi.org/10.1039/c5ay02178b.

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In this study, we developed and validated a sensitive method for the determination of hydrazine in water samples using ion chromatography coupled with an amperometric detector (limit of detection (LOD) = 0.02 μg L<sup>−1</sup> and limit of quantification (LOQ) = 0.1 μg L<sup>−1</sup>).
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Kumar, Anil, Dilip Agarwal, and Mukesh Bansal. "Method Development and Validation of A Novel Anti-Depressant Bupropion by RP-HPLC." Asian Journal of Pharmaceutical Research and Development 8, no. 3 (2020): 211–24. http://dx.doi.org/10.22270/ajprd.v8i3.720.

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A speedy, simple and precise RP-HPLC process was developed for the estimation of novel antidepressant drug bupropion with Waters X – Bridge C-18 5µm, 4.6 X 150 mm columnusing mobile phase Acetonitrile: Ammonium bicarbonate (5mM) pH-9 adjusted with 1% Ammonium hydroxide (50:50, %v/v).The flow rate was 1 ml/min and quantification was done by PDA detector at wavelength254nm.The Bupropion eluted from the column in 5.194 min. The validation was carried out in the light of ICH guidelines with respect to parameters linearity, specificity, accuracy, limit of detection (LOD) and limit of quantification
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Dołowy, Małgorzata, Katarzyna Kulpińska-Kucia, and Alina Pyka. "Validation of a Thin-Layer Chromatography for the Determination of Hydrocortisone Acetate and Lidocaine in a Pharmaceutical Preparation." Scientific World Journal 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/107879.

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A new specific, precise, accurate, and robust TLC-densitometry has been developed for the simultaneous determination of hydrocortisone acetate and lidocaine hydrochloride in combined pharmaceutical formulation. The chromatographic analysis was carried out using a mobile phase consisting of chloroform + acetone + ammonia (25%) in volume composition 8 : 2 : 0.1 and silica gel 60F254plates. Densitometric detection was performed in UV at wavelengths 200 nm and 250 nm, respectively, for lidocaine hydrochloride and hydrocortisone acetate. The validation of the proposed method was performed in terms
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Dissertations / Theses on the topic "Limit of detection (LOD) and limit of quantification (LOQ)"

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Oranzie, Marlon. "Electrochemical Aptasensing of B-Type Natriuretic Peptide-A Biomarker for Myocardial Infarction." University of the Western Cape, 2019. http://hdl.handle.net/11394/7707.

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>Magister Scientiae - MSc<br>infarction (MI) affects many parts of the western world and in South Africa alone it is estimated that MI is responsible for 1 in 6 deaths (17.3%). Traditional diagnostic methods for MI include an electrocardiograms and blood tests. The problem with these diagnostic methods are that they are time consuming, require large sample volumes, expensive equipment and complicated machinery. To achieve early detection of MI the discovery of specific, sensitive and reliable biomarkers are required. Brain natriuretic peptide (BNP) has been identified as a reliable biomarker f
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Ngwanya, Olwethu. "Molecularly imprinted polymers for detection of volatile organics associated with fuel combustion." University of the Western Cape, 2018. http://hdl.handle.net/11394/6363.

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Magister Scientiae - MSc (Chemistry)<br>Pollutants such as polycyclic aromatic hydrocarbons (PAHs) are known for their toxic effects which may lead to the cause of degenerative diseases in both humans and animals. PAHs are widespread in the environment, and may be found in water, food, automotive industry and petrochemical industries to name but a few sources. Literature reports have highlighted industrial workplace exposure to PAHs as a leading cause for development of cancer in workers. Particularly, workers in the petrochemical industry are adversely affected and the incidence of skin and l
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Book chapters on the topic "Limit of detection (LOD) and limit of quantification (LOQ)"

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Koenig, Reiner. "Detection Limit (LOD) and Limit of Quantification (LOQ) Using Microscopical Methods in Asbestos Analysis." In Asbestos and Other Elongate Mineral Particles—New and Continuing Challenges in the 21st Century. ASTM International, 2021. http://dx.doi.org/10.1520/stp163220200051.

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Eremenko, Arkadiy, Il'ya Kurochkin, and Nataliya Nechaeva. "Bioanalytical systems based on cholinesterases for detection of organophosphates." In ORGANOPHOSPHORUS NEUROTOXINS. Publishing Center RIOR, 2020. http://dx.doi.org/10.29039/32_205-218.

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Various types of electrochemical sensors based on the inhibition of butyrylcholinesterase (BChE) have been presented for the analysis of organophosphates (OPC). A special design of thick film sensors and electrochemical detector for cholinesterases assay and their inhibitors in aqueous samples has been developed. For this assay, thiol sensitive sensors based on screen printed graphite electrode modified with nanoparticles of manganese dioxide were used. High sensitivity of manganese dioxide modified thick film sensors towards thiocholine and therefore low detection limit of BChE (1 pM) enabled
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Eremenko, Arkadiy, Il'ya Kurochkin, and Nataliya Nechaeva. "Bioanalytical systems based on cholinesterases for detection of organophosphates." In Organophosphorous Neurotoxins. Publishing Center RIOR, 2020. http://dx.doi.org/10.29039/chapter_5e4132b6096d14.18045940.

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Various types of electrochemical sensors based on the inhibition of butyrylcholinesterase (BChE) have been presented for the analysis of organophosphates (OPC). A special design of thick film sensors and electrochemical detector for cholinesterases assay and their inhibitors in aqueous samples has been developed. For this assay, thiol sensitive sensors based on screen printed graphite electrode modified with nanoparticles of manganese dioxide were used. High sensitivity of manganese dioxide modified thick film sensors towards thiocholine and therefore low detection limit of BChE (1 pM) enabled
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Bhatt, Chhaya, and Manish Rai. "Colorimetric Determination of Pyraclostrobin Fungicide Using P-amino-sulphonic Acid Coupling Reagent in Agricultural Soil/Environmental Samples by Spectrophotometric Analysis." In Advances in Colorimetry [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.111833.

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A simple and sensitive method for the determination of pyraclostrobin, a widely used fungicide, is described here which is based on diazotization and coupling with 4- aminosulphonic acid in alkaline medium. The reaction mechanism is based on the pre-equilibrium formation of amine and diazonium salt followed by a rate-limiting attack of the diazonium ion at an N-atom (N-coupling) to appear the corresponding red colored azo complex. The λmax, molar absorptivity and Sandell’s sensitivity related to the UV-Visible absorption spectrometry were found λmax = 600 nm, 2.7 × 104 L mol−1 cm−1 and 1.01 ×
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"Electroconductive polymer-based nanocomposite ink for enhanced electrochemical detection of doxorubicin using modified screen-printed electrodes." In Book of Abstracts - RAD 2025 Conference. RAD Centre, Niš, Serbia, 2025. https://doi.org/10.21175/rad.abstr.book.2025.44.2.

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Electrochemical sensor design continues to evolve, with ongoing enhancements in surface kinetics leading to devices offering improved analytical performance, reliability, and wider applicability. Screen-printed electrodes have emerged as a focus of extensive research for sensitive drug determination due to their suitability for surface modification. The combination of carbon nanomaterials, noble metals, and polymers has demonstrated promising advancements in sensor performance, utilizing their distinctive chemical and physical properties to achieve exceptional electrode reactivity. Our researc
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Demir, Ersin, Hülya Silah, and Nida Aydogdu. "Electrochemical Applications for the Antioxidant Sensing in Food Samples Such as Citrus and Its Derivatives, Soft Drinks, Supplementary Food and Nutrients." In Citrus [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96873.

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Although there are many definitions of antioxidants, the most general description; antioxidants are carried a phenolic function in their structure and prevent the formation of free radicals or intercept from damage to the cell by scavenging existing radicals. Moreover, they are one of the most effective substances that contain essential nutrients for healthy individuals. The importance of these antioxidants, which have an incredible effect on the body and increase the body’s resistance, is increasing day by day for healthy individuals. Numerous studies have been carried out for antioxidants wi
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Conference papers on the topic "Limit of detection (LOD) and limit of quantification (LOQ)"

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Đukic, Miloš, Stefan Đorđievski, Dragana Adamović, et al. "Validation of the ICP-MS method for determination the heavy metals in water." In Proceedings - 55th International October Conference on Mining and Metallurgy, Kladovo, 15-17 October 2024. Mining and Metallurgy Institute, Bor, 2024. https://doi.org/10.5937/ioc24291d.

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The subject of this paper is validation the analytical method of determining the content of heavy metals Al, As, Cd, Cu, Fe, Mn, Ni, Pb i Zn in water using the mass spectrometry with inductively coupled plasma. The validation parameters that were studied are: linearity, limit of detection (LoD), limit of quantification (LoQ), recovery and precision (RSD). For determined analytes, the values of validation parameters were: LoD (0.011-2.23) mg/L, LoQ (0.03 - 3.4) mg/L, recovery (above 96 %) and the RSD (0.9-3.1) %.
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Sencanski, Jelena, Jelena Maksimović, Ferenc Pastor, et al. "UV/VIS DETERMINING TARTRAZINE (E 102) IN A COMMERCIAL FOOD DYE." In 8th Workshop Food and Drug Safety and Quality. Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, 2024. http://dx.doi.org/10.46793/8fdsq.pb12js.

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Our research presents an analytical curve applicable to accurately determining unknown concentrations of tartrazine in an aqueous solution of any sample. The analytical curve that this study develops may be used to determine the concentration of tartrazine in an aqueous solution of a typical commercially available food dye, which is a mixture of tartrazine and dextrose. The concentration determined in the sample of the food dye was c=7.76 g/ dm3. The examined food dye contained 0.27% of tartrazine. To characterize the presented analytical method, LOD (limit of detection) and LOQ (limit of quan
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Jofre, M., J. M. Perez, P. Martinez, et al. "CMOS-based Image Cytometry for Detection of Phytoplankton in Ballast Water." In IMarEST Ballast Water Technology Conference. IMarEST, 2017. http://dx.doi.org/10.24868/bwtc6.2017.005.

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An image cytometer (CYT) for the analysis of phytoplankton in fresh and marine water environments is introduced. A linear quantification of the number of cells over several orders of magnitude of concentrations was observed using cultures of Tetraselmis and Nannochloropsis measured by autofluorescence of the chlorophyll in a laboratory environment. The functionality of the system outside the laboratory was analysed by phytoplankton quantification of samples taken from marine water environment (Dutch Wadden Sea, The Netherlands) and fresh water environment (Lake Ijssel, The Netherlands). The CY
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Weheabby, Saddam, C. Wang, and Olfa Kanoun. "ELECTROCHEMICAL DETERMINATION OF CARBARYL IN FRUIT JUICE USING AgNPs@rGO MODIFIED ELECTRODE." In 8th Workshop Food and Drug Safety and Quality. Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, 2024. http://dx.doi.org/10.46793/8fdsq.pb18sw.

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In this study, we developed an electrochemical sensor using silver nanoparticles (AgNPs) incorporated onto reduced graphene oxide (rGO) modified screen-printed carbon electrodes (SPCE) for the detection and quantification of carbaryl in grape juice. The proposed sensors demonstrated a detection limit (LoD) of 0.061 µM within a concentration range of 0.1 to 50 µM. When applied to real samples, the sensors exhibited satisfactory recovery rates, highlighting their potential for practical applications in food safety and environmental monitoring.
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Weheabby, Saddam, C. Wang, and Olfa Kanoun. "ELECTROCHEMICAL DETERMINATION OF CARBARYL IN FRUIT JUICE USING AgNPs@rGO MODIFIED ELECTRODE." In 8th Workshop Food and Drug Safety and Quality. Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, 2024. http://dx.doi.org/10.46793/8fdsq.pb17sw.

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In this study, we developed an electrochemical sensor using silver nanoparticles (AgNPs) incorporated onto reduced graphene oxide (rGO) modified screen-printed carbon electrodes (SPCE) for the detection and quantification of carbaryl in grape juice. The proposed sensors demonstrated a detection limit (LoD) of 0.061 µM within a concentration range of 0.1 to 50 µM. When applied to real samples, the sensors exhibited satisfactory recovery rates, highlighting their potential for practical applications in food safety and environmental monitoring.
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Zhang, Fan, Jing Zhao, and Xuan Zhang. "Estimation of relative standard deviation related to limit of detection and limit of quantitation." In 14th International Conference on Applied Human Factors and Ergonomics (AHFE 2023). AHFE International, 2023. http://dx.doi.org/10.54941/ahfe1003050.

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Limit of detection (LOD) is usually determined by calculation of the standard deviation of measurements of blank samples. In several technical reports, LOD is defined as the concentration at the relative standard deviation (RSD) 30% (or other values) for repeated measurements. Similarly, limit of quantitation (LOQ) is also defined at the RSD level 10%. When a laboratory starts to use a method, the method verification should be carried out in advance to guarantee this method can be implemented correctly and the method characteristics (eg. LOD and LOQ) can be satisfied in this lab. But in routin
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Al-saedi, Fatimatulzahraa, Najam-US-Sahar Riyaz, Hagar Morsy, et al. "Colorimetry-Based Detection of Biomarkers in Exhaled Breath for Predicting COVID-19 Disease." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2021. http://dx.doi.org/10.29117/quarfe.2021.0128.

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Exhaled breath is the biological medium that carries relevant medical information and can be used to analyse biomarkers characteristic for detecting abnormal health status. Thus, by systematically analysing the interaction mechanism of the coronavirus with the human cell and its effect on the biological activity, it is possible to indentify the compounds whose proportion in the exhale breath is affected. One such biomarkers are hydrogen peroxide (H2O2) and nitric oxide (NO), which represents oxidative stress in the body. The present study represents the colorimetry based quantification of H2O2
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Grimmler, Christina, Tamara Kuhfuss, Matthias Heiden, and Heinar Schmitdt. "Non-invasive assessment of the bioburden of minced pork using a hand-held fluorescence device." In OCM 2017 - 3rd International Conference on Optical Characterization of Materials. KIT Scientific Publishing, 2017. http://dx.doi.org/10.58895/ksp/1000063696-4.

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To speed-up monitoring of the hygienic status of meat, fast and non-invasive measuring techniques are required. The feasibility of a hand-held fluorescence device (freshdetect) was investigated to quantify the bioburden of minced pork meat. In total, 144 minced pork samples from 18 batches were stored at 2°C for up to 8 days. Fluorescence spectra, L*a*b* colour and total viable mesophilic plate counts (TVC) were measured in parallel during this period. Correlation of the fluorescence spectra with log(TVC/g) using partial least squares regression yielded cross-validated predictions with R²cv =
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Taylor, N. M., A. Walker, D. Nicoletti, et al. "Comparative Analysis of Microbiological Testing Technologies Used in the Energy Industry." In SPE Annual Technical Conference and Exhibition. SPE, 2024. http://dx.doi.org/10.2118/220734-ms.

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Abstract Within the energy industry, there are several technologies used to quantify microbiological contamination of fluids and assets. Some of these technologies can also be used to identify or characterize microorganisms of interest. It is important to understand the scope of detection and limitations of individual assays so that accurate, data-driven decisions can be made. Three fluids varying in chemical composition and origin within the energy sector were tested in this study. Serial dilution for detection of acid producing bacteria (APB) and sulfate reducing bacteria (SRB), activity-rea
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