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Journal articles on the topic 'Colorimetric Estimation'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

AJIT, SRIVASTAVA, and PATIL SHRIDHAR. "Colorimetric Estimation of 4-Cholesten-3-one using Zimmermann Reaction." Journal of Indian Chemical Society Vol. 73, Oct 1996 (1996): 553–54. https://doi.org/10.5281/zenodo.5910723.

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School of Life Sciences, Devi Ahilya Vishwavidyalaya, Vigyan Bhawan, Khandwa Road, lndore-452 001 <em>Manuscript received 18 March 1994, revised 28 December 1994, accepted 16 February 1995</em> Colorimetric Estimation of 4-Cholesten-3-one using Zimmermann Reaction.

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Doctorvaladan, Sahar, Andrea Jelks, Eric Hsieh, Robert Thurer, Mark Zakowski, and David Lagrew. "Accuracy of Blood Loss Measurement during Cesarean Delivery." American Journal of Perinatology Reports 07, no. 02 (2017): e93-e100. http://dx.doi.org/10.1055/s-0037-1601382.

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Objective This study aims to compare the accuracy of visual, quantitative gravimetric, and colorimetric methods used to determine blood loss during cesarean delivery procedures employing a hemoglobin extraction assay as the reference standard. Study Design In 50 patients having cesarean deliveries blood loss determined by assays of hemoglobin content on surgical sponges and in suction canisters was compared with obstetricians' visual estimates, a quantitative gravimetric method, and the blood loss determined by a novel colorimetric system. Agreement between the reference assay and other measur

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KIM, Changhyun, Junyeop Lee, Junkyu Park, et al. "Video-Based Time-Series Feature Extraction Image Encoding Methods for Enhanced Colorimetric Gas Concentration Estimation." ECS Meeting Abstracts MA2022-02, no. 64 (2022): 2408. http://dx.doi.org/10.1149/ma2022-02642408mtgabs.

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Early detection and intervention of gas leaks can reduce industrial risks. Numerous early detection methods have been developed and applied in the industrial field, but they require professional analysis technology, long analysis time, and relatively expensive equipment. Strategies to reduce industrial gas hazards constantly require the development of new, efficient and reliable devices. In the past few decades, various types of gas sensors have been developed based on semiconductors, optical fibers, acoustic waves and other technologies. A significant amount of work has been done in recent ye

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KUGE, Yasuyuki. "Estimation of Colorimetric Specifications for Object Colors." Journal of the Japan Society of Colour Material 58, no. 1 (1985): 3–8. http://dx.doi.org/10.4011/shikizai1937.58.3.

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Amin, Alaa S., Mounir Zaky, and Ashraf M. El-Beshbeshy. "Colorimetric Estimation of Melatonin in Pharmaceutical Formulations." Microchimica Acta 135, no. 1-2 (2000): 81–85. http://dx.doi.org/10.1007/s006040070021.

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6

Costa, Anderson G., Eudócio R. O. da Silva, Murilo M. de Barros, and Jonatthan A. Fagundes. "Estimation of percentage of impurities in coffee using a computer vision system." Revista Brasileira de Engenharia Agrícola e Ambiental 26, no. 2 (2022): 142–48. http://dx.doi.org/10.1590/1807-1929/agriambi.v26n2p142-148.

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ABSTRACT The quality and price of coffee drinks can be affected by contamination with impurities during roasting and grinding. Methods that enable quality control of marketed products are important to meet the standards required by consumers and the industry. The purpose of this study was to estimate the percentage of impurities contained in coffee using textural and colorimetric descriptors obtained from digital images. Arabica coffee beans (Coffea arabica L.) at 100% purity were subjected to roasting and grinding processes, and the initially pure ground coffee was gradually contaminated with

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7

Ngamloetphochit, Seni, and Vijarn Vachirawongsakorn. "Estimation of Post-mortem Interval Based on Livor Mortis using a Colorimeter in Thai Populations." Biomedical Sciences and Clinical Medicine 63, no. 2 (2024): 79–86. http://dx.doi.org/10.12982/bscm.2024.11.

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OBJECTIVE Livor mortis is a helpful and widely used method of estimating postmortem interval (PMI) in Thailand. This study aimed to investigate the value of a colorimeter as a tool for estimating the PMI. METHODS The color of livor mortis and control skin in 80 cadavers whose PMI was within 12 hours was measured by a colorimeter. The L* (brightness), a*b* (chroma and hue), and ∆E* values were compared to the control skin values. Statistical analysis was performed to determine the relationship between PMI and skin color before and after application of a specific pressure. RESULTS The results sh

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8

Narayanan, Pushpa, and K. G. Akamanchi. "Colorimetric estimation of total iridoid content ofPicrorhiza kurrooa." Journal of Asian Natural Products Research 5, no. 2 (2003): 105–11. http://dx.doi.org/10.1080/1028602021000054955.

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9

Preuss, H. G., M. H. Razavi, D. Slemmer, and M. Zein. "Colorimetry of p-aminohippurate in the presence of sulfamethoxazole." Clinical Chemistry 34, no. 2 (1988): 422–23. http://dx.doi.org/10.1093/clinchem/34.2.422.

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Abstract Colorimetric quantification of p-aminohippurate (PAH), which is helpful in assessment of renal function, is subject to interference from sulfa compounds such as sulfamethoxazole. We were unable to measure serum PAH in two patients receiving a trimethoprim-sulfamethoxazole combination because of interference by the latter with the colorimetric estimation. We found that isoamyl acetate removes sulfamethoxazole from the samples without influencing PAH. The extraction is simple, inexpensive, and reproducible.

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Meng, Fan Wei, Qing Tian, and You Liang Yang. "Colorimetric Temperature Measurement Algorithm Based on Multi-Sensor Data Fusion." Applied Mechanics and Materials 530-531 (February 2014): 146–50. http://dx.doi.org/10.4028/www.scientific.net/amm.530-531.146.

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Wavelength and other factors have a deep influence on temperature measurement system based on CCD image sensor. Deviations between measurement values sometimes are large. In order to reduce error, the temperature outputs in different wavelength combinations do have multi-sensor correlation properties in point of colorimetric temperature measurement system view. The colorimetric temperature measurement algorithm based on real-time adaptive weighted is put forward by such performance index that minimum of standard deviation. According to measured value of each sensor, we will find out the corres

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11

Mathpal, S., and N. D. Kandpal. "Colorimetric Estimation of Ni(II) Ions in Aqueous Solution." E-Journal of Chemistry 6, no. 2 (2009): 445–48. http://dx.doi.org/10.1155/2009/913767.

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A rapid and accurate colorimetric method has been proposed for the estimation of nickel(II) in aqueous solution. It is found that nickel(II) ions have maximum absorbance at 393 nm in distilled water and in aqueous sucrose solution (0.3 mol dm-3). In both case, the Beer’s law was obeyed over the range from 0.04 to 0.08 mol dm-3of nickel(II).The value of molar absorpitivity was constant 5.13±0.03 mol dm-3. This method is more rapid than the existing spectrophotometeric methods for the estimation of nickel(II). The variation in the results obtained by the method is ±2.1%.

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12

SOON, Y. K. "A RAPID METHOD FOR CATION EXCHANGE CAPACITY ESTIMATION OF MINERAL SOILS USING METHYLENE BLUE ADSORPTION." Canadian Journal of Soil Science 68, no. 1 (1988): 165–69. http://dx.doi.org/10.4141/cjss88-016.

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A colorimetric method, based on methylene blue adsorption, for rapid analysis of soil CEC is described. The effect of soil pH and organic matter was examined by multiple regression. For 44 test samples CEC was predicted well from transmittance measured at 550 nm (r2 = 0.735**); the r2 increased to 0.815** by excluding two moderately calcareous soil samples, and to 0.872** by including organic matter as a second independent variable. Key words: Methylene blue adsorption, CEC, colorimetric method

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SAWAI, Toru, Ichiro KATAYAMA, Tamio IDA, and Takeshi KAJIMOTO. "ICOPE-15-1024 Estimation of Energy Density and Energy Yield of Torrefied Biomass with Colorimetric Values." Proceedings of the International Conference on Power Engineering (ICOPE) 2015.12 (2015): _ICOPE—15——_ICOPE—15—. http://dx.doi.org/10.1299/jsmeicope.2015.12._icope-15-_14.

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14

Watts, G. F., P. Thaker, and P. M. West. "A Simple Colorimetric Method for Spot Blood Glucose Estimation." Annals of Clinical Biochemistry: An international journal of biochemistry and laboratory medicine 22, no. 6 (1985): 653. http://dx.doi.org/10.1177/000456328502200616.

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15

Underwood, P. A., and P. A. Bean. "Extracellular matrix interferes with colorimetric estimation of cell number." In Vitro Cellular & Developmental Biology - Animal 34, no. 3 (1998): 200–202. http://dx.doi.org/10.1007/s11626-998-0124-8.

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16

Kotera, Hiroaki. "Indirect estimation of spectral response and its colorimetric evaluation." Journal of the Institute of Television Engineers of Japan 41, no. 3 (1987): 264–69. http://dx.doi.org/10.3169/itej1978.41.264.

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17

Molada-Tebar, Adolfo, Geert J. Verhoeven, David Hernández-López, and Diego González-Aguilera. "Practical RGB-to-XYZ Color Transformation Matrix Estimation under Different Lighting Conditions for Graffiti Documentation." Sensors 24, no. 6 (2024): 1743. http://dx.doi.org/10.3390/s24061743.

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Color data are often required for cultural heritage documentation. These data are typically acquired via standard digital cameras since they facilitate a quick and cost-effective way to extract RGB values from photos. However, cameras’ absolute sensor responses are device-dependent and thus not colorimetric. One way to still achieve relatively accurate color data is via camera characterization, a procedure which computes a bespoke RGB-to-XYZ matrix to transform camera-dependent RGB values into the device-independent CIE XYZ color space. This article applies and assesses camera characterization

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18

Pathak, Abhishek, Jayant Borana, Jayesh Vasudeva Adhikari, and Sai Siva Gorthi. "Indicator-Impregnated Agarose Films for Colorimetric Measurement of pH." SLAS TECHNOLOGY: Translating Life Sciences Innovation 22, no. 1 (2016): 81–88. http://dx.doi.org/10.1177/2211068216669686.

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In this article, we report on the development of indicator-impregnated agarose sensor films for colorimetric estimation of the pH of different standard buffer solutions and urine samples. In contrast to the conventional paper-based dipstick method, the presented method employs dried agarose that was infused with a chemical indicator, which when exposed to the test sample results in an appropriate chromogenic outcome. The color change was then quantified by the smart camera system. The divulged instrument has been calibrated with standard buffers and also tested with clinical urine samples. The

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El-Shamy, Ali M., Seham S. El-Hawary, and Mostafa E. M. Rateb. "Quantitative Estimation of Parthenolide in Tanacetum parthenium (L.) Schultz-Bip. Cultivated in Egypt." Journal of AOAC INTERNATIONAL 90, no. 1 (2007): 21–27. http://dx.doi.org/10.1093/jaoac/90.1.21.

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Abstract Parthenolide, a germacranolide-type sesquiterpene lactone, was estimated in Tanacetum parthenium (L.) cultivated in Egypt by using colorimetric, planar chromatographic, and high-performance liquid chromatographic (HPLC) methods. Parthenolide levels in the open-field herb and aseptically germinated shoots were also compared by using the HPLC method. Parthenolide was produced and estimated for the first time in the callus culture of the plant. In addition, 2 Egyptian market preparations were analyzed for their parthenolide content by using the HPLC method. The relative standard deviatio

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20

Kharmate, Shrirang V., Akanksha U. Ingawale, Nilam B. Gurav, et al. "Development and validation of UV spectrophotometric method for determination of chlorpropamide in bulk and formulation." IP International Journal of Comprehensive and Advanced Pharmacology 7, no. 3 (2022): 163–66. http://dx.doi.org/10.18231/j.ijcaap.2022.033.

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The current work focuses on the development and validation of a UV spectrophotometric technique for determining chlorpropamide in bulk and formulation. According to ICH criteria, UV spectrophotometric method was validated for a number of parameters, including linearity, precision, accuracy, sensitivity, limit of detection (LOD), and limit of quantification (LOQ). The maximum wavelength of chlorpropamide was discovered to be 580 nm, and a colorimetric method was created for the quantitative estimation of colour and to quantify the absorbance of a particular wavelength of light by a particular s

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21

Olmos, J. M., M. A. Lasunción, and E. Herrera. "Dextran Sulfate Complexes with Potassium Phosphate to Interfere in Determinations of High-Density Lipoprotein Cholesterol." Clinical Chemistry 38, no. 2 (1992): 233–37. http://dx.doi.org/10.1093/clinchem/38.2.233.

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Abstract The interference of dextran sulfate with the colorimetric determination of free cholesterol causes an increase in the absorbance that is proportional to the dextran sulfate concentration in the sample. This makes estimation of the free cholesterol concentration unreliable in high-density lipoprotein-containing supernates obtained after plasma precipitation with dextran sulfate/MgCl2. Analysis of the absorption spectrum demonstrated that the absorbance increase was due to turbidity. We observed this effect with colorimetric reagents based on potassium phosphate buffer but not with thos

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22

Saiyed, Samar Ashfaq, Preeti Jadeja, and Rajashree Mashru. "Development and Validation of Extractive Spectrophotometric Methods for the Estimation of Telmisartan by Using Smartphone Application." Journal of Drug Delivery and Therapeutics 12, no. 3-S (2022): 178–90. http://dx.doi.org/10.22270/jddt.v12i3-s.5527.

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Two simple, sensitive, accurate, precise and reproducible extractive colorimetric methods were developed for estimation of Telmisartan in bulk and pharmaceutical dosage form. These methods are based on the formation of colored ion-pair complex of Telmisartan with Bromocresol green (BCG) and Bromocresol purple (BCP) dyes in acidic medium. The complex was extracted in chloroform and estimated quantitatively at 421 nm and 411 nm for BCG and BCP dyes respectively. For estimation of TMS present in the sample, estimation was also done by using Smartphone Application known as PhotoMetrix Pro. Beer La

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23

Gaur, Ajay, RK Gupta, and B. Shrivastava. "Colorimetric estimation of sulphacetamide sodium in bulk and in formulations." Indian Journal of Pharmaceutical Sciences 69, no. 3 (2007): 464. http://dx.doi.org/10.4103/0250-474x.34567.

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., Venugopal R. Darak, Arvind B. Karadi ., MD Arshad ., and Dipali Patil . "Colorimetric Estimation of Mesalamine in Bulk and Pharmaceutical Dosage Forms." Journal of Current Pharma Research 1, no. 3 (2011): 232–35. http://dx.doi.org/10.33786/jcpr.2011.v01i03.003.

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25

Haishima, Yuji, Chie Hasegawa, Takeshi Yagami, Toshie Tsuchiya, Rieko Matsuda, and Yuzuru Hayashi. "Estimation of uncertainty in kinetic-colorimetric assay of bacterial endotoxins." Journal of Pharmaceutical and Biomedical Analysis 32, no. 3 (2003): 495–503. http://dx.doi.org/10.1016/s0731-7085(03)00053-0.

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26

Shrivastava, Siddhartha, and Debabrata Dash. "Label-free colorimetric estimation of proteins using nanoparticles of silver." Nano-Micro Letters 2, no. 3 (2010): 164–68. http://dx.doi.org/10.1007/bf03353636.

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27

FARRAR, J. E., and K. LEES. "A Colorimetric Method for the Estimation of Dieldrin in Wool." Journal of the Society of Dyers and Colourists 82, no. 10 (2008): 379–82. http://dx.doi.org/10.1111/j.1478-4408.1966.tb02685.x.

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28

Biswas, R. K., M. A. Habib, and H. P. Singha. "Colorimetric estimation and some physicochemical properties of purified Cyanex 272." Hydrometallurgy 76, no. 1-2 (2005): 97–104. http://dx.doi.org/10.1016/j.hydromet.2004.09.005.

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29

Ohta, N. "Estimation of luminance factor from cie supplementary standard colorimetric observers." Color Research & Application 17, no. 2 (1992): 123–26. http://dx.doi.org/10.1002/col.5080170209.

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30

Nag, Alo, Gargi Mitra, and Prahlad C. Ghosh. "A Colorimetric Estimation of Polyethyleneglycol-Conjugated Phospholipid in Stealth Liposomes." Analytical Biochemistry 250, no. 1 (1997): 35–43. http://dx.doi.org/10.1006/abio.1997.2167.

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31

Domard, Alain, and Valerie Vasseur. "Non-specificity of a colorimetric method for the estimation of." International Journal of Biological Macromolecules 13, no. 6 (1991): 366–68. http://dx.doi.org/10.1016/0141-8130(91)90020-u.

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32

Saliama, Reinhard. "Estimation Age of Bloodstain Using Smartphone Application on Colorimetric Analysis." Jurnal Biosains Pascasarjana 25, no. 1 (2023): 15–23. http://dx.doi.org/10.20473/jbp.v25i1.2023.15-23.

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Advances in technology should be able to help the work of forensic experts, especially in solving criminal crime cases. Estimated age of bloodstains is an important factor in forensic analysis. This study aims to identify the age of bloodstains using the colorimetric method and observe changes in the color of bloodstains on the surface of the material based on the results of photos using a smartphone camera. This study is an experimental study with a control time series design, where bloodstain samples are observed in a certain period longitudinally. Bloodstains were dripped on five different

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33

Kadima, Tenshuk A., and Michael A. Pickard. "A colorimetric assay for immobilized chloroperoxidase." Canadian Journal of Microbiology 36, no. 4 (1990): 302–4. http://dx.doi.org/10.1139/m90-053.

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A rapid and sensitive colorimetric assay was developed for the estimation of chloroperoxidase activity. N,N,N′,N′-Tetramethyl-p-phenylenediamine was chosen from four potential chromogenic substrates because the blue product resulting from chloroperoxidase conversion gave the highest molar absorption. This product exhibited two absorbance maxima, at 563 and 610 nm. Activity was monitored at 563 nm, and the product absorbance was stable for at least 1 h at 10 °C after treatment with an equal volume of a mixture (40:1) of methanol and phosphoric acid (85% w/v), pH 2. The linear range of the assay

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ZAHEER, KHAN, Z. A. RAFIQUEE MD. та AZIZ KHAN A. "Effect of Temperature, pH, Hydrindantin, Ascorbic Acid and Organic Solvents in the Colorimetric Estimation of α-Amino Acids with Ninhydrin". Journal of Indian Chemical Society Vol. 73, Jun 1996 (1996): 305–6. https://doi.org/10.5281/zenodo.5901945.

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Department of Chemistry, Aligarh Muslim University, Aligarh-202 002 <em>Manuscript received 16 February 1994, revised 5 September 1994, accepted 19 October 1994</em> Effect of Temperature, pH, Hydrindantin, Ascorbic Acid and Organic Solvents in the Colorimetric Estimation of α-Amino Acids with Ninhydrin.

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Torres Ospina, Alexandra, Julian Andrés Zapata, Jesus Humberto Gil Gonzalez, Luis Giraldo, and Diana Marcela Valencia. "Colorimetric method as alternative to chromium (III) quantification in cattle feces." Acta Scientiarum. Animal Sciences 42 (April 1, 2020): e48096. http://dx.doi.org/10.4025/actascianimsci.v42i1.48096.

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One of the main factors to establish productivity of grazing cattle is the estimation of forage intake. For this, the most widely used technique is based on the estimation of fecal output using chromium dioxide as external marker. However, quantification can be expensive and sometimes not precise due to the methodology used for this purpose. Therefore, the aim of this study was to validate the colorimetric method for chromium quantification and to implement it in the estimation of fecal output in grazing cattle. The temperature, the digestion time and the wavelength for the measurement were ev

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36

Saha, Utpal. "Colorimetric Determination of Tetracycline Hydrochloride in Pharmaceutical Preparations." Journal of AOAC INTERNATIONAL 70, no. 4 (1987): 686–88. http://dx.doi.org/10.1093/jaoac/70.4.686.

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Abstract A simple, sensitive, and rapid colorimetric method is presented for the estimation of tetracycline hydrochloride as the pure drug and in formulations. The proposed method is based on the reaction of tetracycline HC1 with cupric chloride in an alkaline medium to give a yellowish green solution whose absorbance is measured at 400 nm against a reagent blank. The color obeys Beer's law in the concentration range of 0-20 μg/mL. Molar absorptivity and Sandell's sensitivity of the yellowish-green copper complexes of tetracycline HC1 are 1.99 x 104 Lmol-1 cm-1 and 0.0241 ppm, respectively.

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Ahamed, Syed Sagheer, Mohamed Khaleel, Nirmal T. Havannavar, and Syed Shariff Miyan. "Colorimetric Estimation of Nebivolol Hydrochloride in Bulk and Pharmaceutical Dosage Form." Asian Journal of Pharmacy and Technology 9, no. 4 (2019): 253. http://dx.doi.org/10.5958/2231-5713.2019.00042.4.

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Maiti, Swarnali, Gadadhar Barman, and Jayasree Konar Laha. "Colorimetric Estimation of 3–Mercapto-1, 2-Propanediol by Silver Nanoparticles." Journal of Surface Science and Technology 32, no. 1-2 (2016): 45. http://dx.doi.org/10.18311/jsst/2016/6601.

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Interaction of 3 -mercapto-1, 2- propanediol (3MPD) (C<sub>3</sub>H<sub>8</sub>O<sub>2</sub>S, 3MPD) with silver nanoparticles prepared by green method has been studied by electronic absorption spectroscopy and transmission electron microscopy. Here we report the changes in properties of AgNP in presence of biologically relevant molecule 3MPD. The assembly and the aggregation of the AgNP are established using UV-Visible spectra and transmission electron microscopy. The biosynthesized AgNP has been used as colorimetric sensor for detection of 3MPD. A new peak

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SAWAI, Toru, Ichiro KATAYAMA, Tamio IDA, Hiroki IMAMURA, and Takeshi KAJIMOTO. "Estimation of energy properties of torrefied Japanese cedar with colorimetric values." Mechanical Engineering Journal 4, no. 1 (2017): 16–00320. http://dx.doi.org/10.1299/mej.16-00320.

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Kaur, Navneet, and Subodh Kumar. "Single molecular colorimetric probe for simultaneous estimation of Cu2+ and Ni2+." Chemical Communications, no. 29 (2007): 3069. http://dx.doi.org/10.1039/b703529b.

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Safi, Mahdi, and Tayebe Soleymanian. "Scanner colorimetric characterization for concentration estimation in single-component dyeing systems." Journal of The Textile Institute 108, no. 12 (2017): 2040–45. http://dx.doi.org/10.1080/00405000.2017.1311765.

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Sruthi, K., T. Fahida, Thasni K. F. Faseela, and Unnikrishnan C. K.* Nandana. "DEVELOPMENT AND VALIDATION OF COLORIMETRIC METHOD FOR THE ESTIMATION OF MESALAMINE." World Journal of Pharmaceutical Science and Research 4, no. 2 (2025): 359–66. https://doi.org/10.5281/zenodo.15113290.

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43

Attia, Khalid A. M., Nasr M. El-Abasawi, and Ahmed H. Abdelazim. "Colorimetric estimation of alfuzosin hydrochloride in pharmaceutical preparation based on computational studies." Anal. Methods 8, no. 8 (2016): 1798–805. http://dx.doi.org/10.1039/c5ay02635k.

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Computational and theoretical studies were done electronically and geometrically to find a suitable, selective and sensitive coupling agent applicable for diazocoupling estimation of alfuzosin hydrochloride (ALF).

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Malve, Harshad, and Amit Asalkar. "Which LDL Value Should Clinicians Look at?" Journal of Laboratory Physicians 13, no. 02 (2021): 129–33. http://dx.doi.org/10.1055/s-0041-1729131.

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Abstract Objectives LDL cholesterol is routinely estimated by the Friedewald formula to guide the treatment of dyslipidemia. However, Friedewald equation has certain limitations, especially with high triglyceride levels. Direct methods are available for LDL estimation but have received relatively little scrutiny in the Indian setting. This study was aimed at comparing the calculative and direct methods of LDL estimation in Indian hyperlipidemic patients. Materials and Methods In this observational study, data from 380 consecutive lipid profiles of patients visiting a tertiary care hospital in

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45

Fraihat, S. "A novel chromogenic agent for colorimetric estimation of copper in water and pharmaceutical tablets." South African Journal of Chemistry 77 (2023): 138–42. http://dx.doi.org/10.17159/0379-4350/2023/v77a17.

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The current study intends to develop a novel, simple and selective colorimetric method to identify the presence of copper on the basis of a newly-synthesized Schiff base prepared from the condensation of 1,3-phthalaldehyde with 2-aminophenol. The new chromogenic agent was studied using elemental analysis, IR, NMR, MS, and UV-VIS absorption. The new chelate produces a stable colored complex with Cu(II) ions with a 1:1 composition using the continuous variation method. The colored complex exhibited a strong absorption peak at 440 nm and this phenomenon empowers copper analysis to be conducted in

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Nanda Kumar, D., A. Rajeshwari, Sruthi Ann Alex, N. Chandrasekaran, and Amitava Mukherjee. "An ultrasensitive colorimetric sensor for efficient detection of Hg2+ at physiological pH." Analytical Methods 7, no. 6 (2015): 2268–72. http://dx.doi.org/10.1039/c5ay00212e.

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47

Choi, Namhyeok, Bumjun Park, Min Ji Lee, et al. "Fabrication of Carbon Disulfide Added Colloidal Gold Colorimetric Sensor for the Rapid and On-Site Detection of Biogenic Amines." Sensors 21, no. 5 (2021): 1738. http://dx.doi.org/10.3390/s21051738.

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Meat is often wasted due to the perceived concerns of its shelf life and preservation. Specifically, in meat formation, biogenic amines (BAs) are the major agents to spoil them. Herein, we have developed a carbon disulfide (CS2) added colloidal gold nanoparticles-based colorimetric sensor for the rapid and on-site detection of biogenic amines. Transmission electron microscopy is used to observe the morphological changes in colloidal gold nanoparticles and aggregation behavior of CS2 added to the colloidal gold nanoparticles’ solution. Raman spectroscopic analysis is further used to characteriz

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Vinny, Therissa Mangam, Nathaniel Kumar Sarella Prakash, Siddhantapu Supraja, Sudhabattula Saibabu, and Anitha Surampudi Veera. "Novel colorimetric approach for amikacin estimation in pure powder and its pharmaceutical formulations." World Journal of Biology Pharmacy and Health Sciences 14, no. 1 (2023): 270–79. https://doi.org/10.5281/zenodo.8038219.

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A sensitive and validated colorimetric method was developed and optimized for the estimation of amikacin sulfate in pure and pharmaceutical dosage forms. Ascorbic acid was used as a chromogenic reagent to produce a stable color complex with amikacin that absorbs strongly at 390nm and 540nm. Several experimental factors were evaluated to maximize color development and stability, including solvent, reagent concentration, reaction time, and temperature. Optimal conditions were found using DMSO solvent, 0.2% ascorbic acid, and 40 minutes reaction time at 25°C. Under these conditions, Beer'

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Sharma, Rajni Kant, Preeti Chanalia, Aditi Sharma, Manish Kumar, and Baldev Kumar. "Quantitative Estimation of Secondary Metabolites of Shadanga Paniya Classical Ayurvedic Formulation and Constituent Herbs." Ancient Science of Life 38, no. 3&4 (2024): 117–21. http://dx.doi.org/10.4103/asl.asl_30_22.

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Abstract Background: In the present scenario, ayurvedic drugs and their formulations need standardization to understand their pharmacokinetics and to prevent any safety issues. Shadanga Paniya (SP) is a classical ayurvedic formulation composed of six herbs and most of the constituent herbs have been shown the presence of alkaloids, flavonoids, and total phenolic contents (TPC). Materials and Methods: Preliminary qualitative estimations of alkaloids, flavonoids, and TPC in SP formulation and its constituent herbs were done using Dragendroff’s method, sodium hydroxide solution, and ferric chlori

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Marrone, Alessandro, Daniele La Russa, Alberto Montesanto, Vincenzo Lagani, Mauro F. La Russa, and Daniela Pellegrino. "Short and Long Time Bloodstains Age Determination by Colorimetric Analysis: A Pilot Study." Molecules 26, no. 20 (2021): 6272. http://dx.doi.org/10.3390/molecules26206272.

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Bloodstains found at crime scenes represent a crucial source of information for investigative purposes. However, in forensic practice, no technique is currently used to estimate the time from deposition of bloodstains. This preliminary study focuses on the age estimation of bloodstains by exploiting the color variations over time due to the oxidation of the blood. For this purpose, we used a colorimetric methodology in order to easily obtain objective, univocal and reproducible results. We developed two bloodstain age prediction algorithms: a short-term and a long-term useful model for the fir

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