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Journal articles on the topic 'Colorimetric method'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Lixiu, He, Hu Yuefei, and Lv Zhiqiao. "Research Progress in Detection of Explosives by Chemical Colorimetric Method." Expert Review of Chinese Chemical 2, no. 1 (2024): 1–4. http://dx.doi.org/10.62022/ercc.issn3006-0095.2024.01.001.

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This article reviews the current application status and research progress of colorimetric detection methods based on chemical colorimetry in the detection of explosives.It mainly introduced colorimetric sensors, colorimetric sensor arrays, and chemical colorimetric sensors based on novel material substrates. The application prospect of chemical colorimetric method in the field of explosives detection was prospected.

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Xu, Ning, Shuang Jin, and Li Wang. "Metal nanoparticles-based nanoplatforms for colorimetric sensing: A review." Reviews in Analytical Chemistry 40, no. 1 (2020): 1–11. http://dx.doi.org/10.1515/revac-2021-0122.

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Abstract With the progress of analysis technology and nanotechnology, colorimetric detection has become one of the research hotspots in the field of analytical chemistry. Compared with traditional detection methods, the colorimetric method has many advantages, such as high sensitivity, good selectivity, convenience and fast, as well as low cost. In recent years, metal nanoparticles have been introduced into colorimetry, making the research and application of colorimetry develop rapidly. In this work, we summarize the usual colorimetric detection methods based on metal nanoparticles-based nanoz

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Yefymenko, Serhii, Ihor Hryhorenko, Iurii Khoroshailo, and Svitlana Hryhorenko. "Applying covariance analysis to determine the factor influence on the control parameter in colorimetric study." Ukrainian Metrological Journal, no. 3 (September 30, 2022): 49–55. http://dx.doi.org/10.24027/2306-7039.3.2022.269783.

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The paper considers solutions to a scientific and practical problem of applying covariance analysis to determine the factor influence on the functional transformation of the control parameter in colorimetric study. The study implies determining the factor influence on the additive and multiplicative components of the measurement error of the colorimetric control parameter to assess the validity of conclusions about the factor influence on the transformation of the control parameter. The limitations on the number of basic levels (control parameters) and the factors influencing the result of col

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Majdinasab, Marjan, Sondes Ben Aissa, and Jean Louis Marty. "Advances in Colorimetric Strategies for Mycotoxins Detection: Toward Rapid Industrial Monitoring." Toxins 13, no. 1 (2020): 13. http://dx.doi.org/10.3390/toxins13010013.

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Mycotoxins contamination is a global public health concern. Therefore, highly sensitive and selective techniques are needed for their on-site monitoring. Several approaches are conceivable for mycotoxins analysis, among which colorimetric methods are the most attractive for commercialization purposes thanks to their visual read-out, easy operation, cost-effectiveness, and rapid response. This review covers the latest achievements in the last five years for the development of colorimetric methods specific to mycotoxins analysis, with a particular emphasis on their potential for large-scale appl

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ZANUNCIO, ANTONIO JOSÉ VINHA, EMANUEL ARNONI COSTA, AMÉLIA GUIMARÃES CARVALHO, VINÍCIUS RESENDE DE CASTRO, ANGÉLICA DE CASSIA OLIVEIRA CARNEIRO, and SOLANGE DE OLIVEIRA ARAÚJO. "ARTIFICIAL INTELLIGENCE AND COLORIMETRY AS A COMBINED NON-DESTRUCTIVE METHOD TO PREDICT PROPERTIES OF HEAT-TREATED WOOD." Cellulose Chemistry and Technology 56, no. 9-10 (2022): 941–48. http://dx.doi.org/10.35812/cellulosechemtechnol.2022.56.84.

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Colorimetric evaluation is practical, accurate and fast. Starting from the generally established fact that a heat treatment changes the wood properties, the present paper aimed to predict the properties of heat-treated wood by using colorimetry and artificial neural networks (ANNs). Eucalyptus grandis and Pinus caribaea wood samples were heat-treated to evaluate their color, as well as physical and mechanical properties. The relationship between the wood color and its physical and mechanical properties was evaluated through multilayer perceptron (MLP) neural network. The heat treatment darkene

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Dyaninggar, Pratyangga Surya, Sri Juari Santosa, and Bambang Rusdiarso. "Preliminary Research on the Analysis of Chromium(III) Based on Digital Image Processing Method Utilizing Gold Nanoparticles as Colorimetric Sensor." Nano Hybrids and Composites 37 (August 31, 2022): 15–22. http://dx.doi.org/10.4028/p-t3ga7q.

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Gold nanoparticles (AuNPs) have been successfully synthesized using L-Ascorbic Acid as a reducing agent and p-Aminobenzoic Acid as a capping agent. These AuNPs were used to detect and quantify Chromium(III) as a pollutant utilizing its unique characteristic called surface plasmon resonance (SPR). The change of SPR and color of AuNPs then was employed to determine the concentration of Cr(III) by using colorimetric and Digital Image Colorimetric methods. Digital Image Colorimetry allowed to development of an easier and cheaper way to detect and quantify Cr(III). AuNPs capped p-aminobenzoic acid

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Gibbs, Harold A. A., and Leonard W. O'Garro. "Capsaicin Content of West Indies Hot Pepper Cultivars Using Colorimetric and Chromatographic Techniques." HortScience 39, no. 1 (2004): 132–35. http://dx.doi.org/10.21273/hortsci.39.1.132.

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Colorimetric and chromatographic methods were used to assess capsaicinoid levels in a pungent Caribbean-grown pepper collection comprising 28 accessions of Capsicum chinense and one each of C. annuum and C. frutescens. Two colorimetric methods, one commonly used and attributed to Bajaj (1980) and a modification of the Bajaj method were also compared for congruity and ease of use. Capsaicin content of the cultivars ranged from 37.6 to 497.0 mg/100 g in ripe fruits and 27.8 to 404.5 mg/100 g in green fruit, as determined by Bajaj's method. The corresponding Scoville units of pungency varied from

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Lee, Sang Yoon, Hyo Je Park, Cheol Woo Han, Seung Yun Lee, and Gi Young Kweon. "Validation of a Rapid Colorimetric Method with Field Soils." Transactions of the ASABE 60, no. 4 (2017): 1271–78. http://dx.doi.org/10.13031/trans.12204.

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Abstract. Regularly monitoring the variations in soil composition is an essential part of proper cultivation management. Some conventional soil characterization methods are often costly and require experienced labor. The spectroscopic method is a simpler procedure that minimizes experimental steps and is faster and more economical than conventional methods. Wide-ranging analytical methods have been developed to determine soil phosphorus concentrations in the field; however, no method has been commercialized. Analytical methods based on colorimetric Mehlich-3 and Lancaster soil tests, developed

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Garmay, Andrei V., Oksana V. Monogarova, Kirill V. Oskolok, and Pavel М. Radzikovitskiy. "DETERMINATION OF NITRATE IN SOILS BY DIGITAL COLORIMETRY." Lomonosov chemistry journal 66, no. 1, 2025 (2025): 52–59. https://doi.org/10.55959/msu0579-9384-2-2025-66-1-52-59.

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A method for determining nitrate in soil by digital colorimetry is proposed. The developed approach is based on appropriate photometric techniques of nitrate determination after potassium chloride extraction from soil samples. The original method of determining nitrate in the form of an azo dye formed by the azo coupling reaction between 1-naphtylamine and sulfanilamide has been modifi ed to achieve a higher sensitivity and accuracy of colorimetric determination. This approach ensures metrological characteristics of the digital colorimetric technique, close to spectrophotometric. The adequacy

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Foster, Kim, Susan Garramone, Karen Ferraro, and E. Patrick Groody. "Modified Colorimetric DNA Hybridization Method and Conventional Culture Method for Detection of Salmonella in Foods: Comparison of Methods." Journal of AOAC INTERNATIONAL 75, no. 4 (1992): 685–92. http://dx.doi.org/10.1093/jaoac/75.4.685.

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Abstract A new, improved colorimetric DNA hybridization method for detection of Salmonella in food was developed. A new modified Colorimetric GENETRAK ® Salmonella Assay (m-DNAH) is similar to the current Colorimetric GENE-TRAK Salmonella Assay (c-DNAH) except that the number of assay steps has been reduced, indicator dyes have been added to some reagents to facilitate the tracking of reagent additions, and the probe set has been modified so that subgenus V Salmonella can be detected. The new probe set detected 453/453 Salmonella strains representing at least 239 serovars and 50 somatic antige

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Miks, Antonin, Jiri Novak, and Pavel Novak. "Colorimetric method for phase evaluation." Journal of the Optical Society of America A 23, no. 4 (2006): 894. http://dx.doi.org/10.1364/josaa.23.000894.

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Labadie, Michael P., and Charles E. Boufford. "Gas Chromatographic Assay of Supplemental Vitamin E Acetate Concentrates: Collaborative Study." Journal of AOAC INTERNATIONAL 71, no. 6 (1988): 1168–71. http://dx.doi.org/10.1093/jaoac/71.6.1168.

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Abstract A gas chromatographic (GC) method for determination of supplemental a-tocopheryl acetate in high potency vitamin £ powders and oils was collaboratively studied as an alternative to the AOAC colorimetric method (43.147-43.151, Emmerie-Engel), which requires saponification, extraction of the saponifiable fraction, and quantitation by colorimetry. The simpler GC procedure requires only extraction and/or enzymatic digestion and dilution before quantitation. Six blind duplicates were distributed to 10 laboratories; all 10 returned results. Repeatability (sr) and reproducibility (sR), % vit

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Jiang, Lei, Shi Sheng Zhou, and Ying Cui. "Model of Ink Quantity Control Based on Colorimetry System." Applied Mechanics and Materials 262 (December 2012): 258–62. http://dx.doi.org/10.4028/www.scientific.net/amm.262.258.

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Abstract. In the offset printing process，the ink quantity control in the ink zone, color and ink quantity transformation algorithm and the establishment of database，are all based on principle of density measurement. With the establishment and wide spread use of the standard ISO12647-2 for offset, colorimetric measurement is becoming a tendency. By experimental research，this article analyses the relationship between ink thickness and colorimetric value(L*a*b*) by regression method, determines the best ink quantity parameter, establishes the model of ink quantity controlling based on colorimetry

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Khoroshailo, Yurii, Iryna Sezonova, Oleksandr Degtiarov, Maksym Korbetskyy, and Pavlo Biletskyy. "RESEARCH ON THE POSSIBILITIES OF USING COLORIMETRY IN MEDICINE." Metrology and instruments, no. 2 (December 13, 2024): 07. https://doi.org/10.30837/2663-9564.2024.2.07.

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Studies of the possibility of using colorimetry in medicine aim to use modern methods and devices for diagnosing the concentration of substances in natural solutions. Colorimetry as a method of measuring the concentration of substances is based on the ability of solutions of certain substances to change color at different concentrations. The method allows quantitatively determining the concentration of a substance based on the color intensity recorded by a device - a colorimeter. The basic principles of colorimetry include spectrophotometry, application of the Bouguer-Lambert-Beer law, calibra

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15

AMELIN, VASILY G., SHOGAH ZEN ALABDEN CHALAWI, and DMITRY S. BOLSHAKOV. "IDENTIFICATION AND AUTHENTICATION OF COW’S MILK POWDER USING A SMARTPHONE AND CHEMOMETRIC ANALYSIS." Lomonosov chemistry journal 64, no. 1, 2023 (2023): 49–59. http://dx.doi.org/10.55959/msu0579-9384-2-2023-64-1-49-59.

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The possibility of identi cation and authentication of cow’s milk powder by the method of chemical colorimetry of the samples’ own uorescence using a smartphone camera and chemometric analysis is shown. A fundamental test device for direct colorimetric analysis of powdered milk is proposed, excluding the stage of sample preparation. Fluorescence excitation was carried out with a portable source of monochromatic UV radiation (λ = 365 nm). Colorimetric parameters of powdered milk uorescence in RGB space were recorded using a smartphone camera. We used chemometric processing of the calculated ana

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Puasa, S. W., M. S. Ruzitah, and A. S. A. K. Sharifah. "Simplified Colorimetric Method Using Reactive Orange 16 for Analysis of Cationic Surfactant." Advanced Materials Research 701 (May 2013): 342–46. http://dx.doi.org/10.4028/www.scientific.net/amr.701.342.

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The concentration of surfactant is usually determined by a colorimetric method. A simplified colorimetric method for determining cationic surfactant was proposed which has advantages over the existing colorimetric method where less chemical is used and the overall time to perform the analysis per sample is reduced by half. These methods were tested based on analyzing the ionic interaction of cationic surfactant-reactive orange 16 (PBE-RO16) mixtures. A linear correlation was observed between the absorbance ratio of PBE-RO16 mixture/dye and PBE concentration. Results obtained from this study sh

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17

Neal, M., C. Neal, H. Wickham, and S. Harman. "Determination of bromide, chloride, fluoride, nitrate and sulphate by ion chromatography: comparisons of methodologies for rainfall, cloud water and river waters at the Plynlimon catchments of mid-Wales." Hydrology and Earth System Sciences 11, no. 1 (2007): 294–300. http://dx.doi.org/10.5194/hess-11-294-2007.

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Abstract. The results of determination of bromide, chloride, fluoride, nitrate and sulphate using ion chromatography (IC) are compared with those obtained by colorimetric and inductively coupled plasma optical emission spectroscopy (ICPOES) for rainfall, cloud water and stream waters in the Plynlimon experimental catchments of mid-Wales. For bromide, the concentrations determined by IC are lower than those for the colorimetric method used; the colorimetric method probably determined bromide plus organo-bromine compounds. It is suggested that the values determined by the colorimetric method be

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18

Wyble, David R. "Spectral Imaging Method for Transmissive Media." Archiving Conference 2021, no. 1 (2021): 51–55. http://dx.doi.org/10.2352/issn.2168-3204.2021.1.0.12.

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An imaging process is described which captures spectral transmittance for transmissive media. The specific application is positive and negative large-format film. The system is based on a ten channel LED backlight source and a monochrome camera. The LED source sequentially back-illuminated reference targets and film samples, with an image captured for each LED channel. From the measured data and images of reference targets, a model was developed to predict spectral transmittance. With that model, the 10 images of a sample were combined to a single 31-band spectral image. Spectral images can be

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19

Carbonell, Elvira, Elvira Costell, and Luís Durán. "Evaluation of Various Methods for Measurement of Pectin Content in Jam." Journal of AOAC INTERNATIONAL 72, no. 4 (1989): 689–93. http://dx.doi.org/10.1093/jaoac/72.4.689.

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Abstract Suitability, precision, and accuracy of 3 colorimetric methods to measure pectin content in fruit jams are examined. The methods resolve non-uronide interferences in different ways: (1) with 3,5-dimethylphenol colorimetric reagent, and absorbance differences measured at 450 and 400 nm; (2) with m-hydroxydiphenyl colorimetric reagent, and numeric correction of sample blank to compensate for interferences; and (3) with m-hydroxydiphenyl colorimetric reagent and removal of interferences by purification of sample pectins. The 3,5-dimethylphenol method is not suitable when fructose is pres

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Kanakashree, H. R., T. N. Kishora, and T. N. Ramesh. "Colorimetric Studies for the Detection of Dopamine Using Vanillin." Oriental Journal Of Chemistry 40, no. 6 (2024): 1768–73. https://doi.org/10.13005/ojc/400629.

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Complex formation between dopamine hydrochloride and vanillin using a colorimetric method was investigated to develop a simple and effective approach for the detection and quantification of dopamine. Dopamine, a neurotransmitter with significant biological importance, reacts with vanillin, an aromatic aldehyde in ethanol, resulting in a color change (colorless to light brown) that was measured using colorimetry. The optimal conditions for complex formation with a specific molar ratio of dopamine hydrochloride to vanillin have been studied to establish a calibration curve correlating absorbance

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Layne, Tiffany R., Anchi Scott, Larissa L. Cunha, Rachelle Turiello, and James P. Landers. "Three-Dimensional-Printed Instrument for Isothermal Nucleic Acid Amplification with Real-Time Colorimetric Imaging." Micromachines 15, no. 2 (2024): 271. http://dx.doi.org/10.3390/mi15020271.

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Isothermal amplification methods have become popular in research due to the simplicity of the technology needed to run the reactions. Specifically, loop-mediated isothermal amplification (LAMP) has been widely used for various applications since first reported in 2000. LAMP reactions are commonly monitored with the use of colorimetry. Although color changes associated with positive amplification are apparent to the naked eye, this detection method is subjective due to inherent differences in visual perception from person to person. The objectivity of the colorimetric detection method may be im

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Luo, Cheng, Wei Wen, Fenge Lin, Xiuhua Zhang, Haoshuang Gu, and Shengfu Wang. "Simplified aptamer-based colorimetric method using unmodified gold nanoparticles for the detection of carcinoma embryonic antigen." RSC Advances 5, no. 15 (2015): 10994–99. http://dx.doi.org/10.1039/c4ra14833a.

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A new colorimetric aptasensor for the detection of CEA was developed. Aptamer-based colorimetric method with nanoparticles was used for the detection of CEA. The colorimetric aptasensor has potential for the detection of other proteins or nucleotides.

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Lotichius, J. "A Colorimetric Method of Determining Indigo." Journal of the Society of Dyers and Colourists 56, no. 10 (2008): 432–34. http://dx.doi.org/10.1111/j.1478-4408.1940.tb02084.x.

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Sushma, Umesh, Alok K. Srivastava, and Manonmani H. Krishnan. "Melamine Detection in Food matrices employing Chicken Antibody (IgY): A Comparison between Colorimetric and Chemiluminescent Methods." Current Analytical Chemistry 15, no. 6 (2019): 668–77. http://dx.doi.org/10.2174/1573411015666181205120323.

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Background:Melamine, contains 67% nitrogen by mass, and is adulterated in foods to uplift false protein. There is an urgent requirement to develop fast screening techniques for monitoring melamine in foods.Objective:To develop rapid, high throughput detection techniques for melamine in the food matrix.Methods:IgY antibodies were developed against melamine in the hen, isolated and used for detection of melamine. The detection by colorimetric and chemiluminescent methods was compared.Results:The detection range for melamine was 1 ng-25 µg by the colorimetric method and 10 fg/mL-25 ng/mL by the c

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Rubino, L., V. Catapano, and G. Guerra. "Determination of inorganic phosphorus in serum: Evaluation of three methods applied to the Technicon RA-1000 analyzer." Journal of Automatic Chemistry 11, no. 4 (1989): 164–67. http://dx.doi.org/10.1155/s1463924689000350.

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We have evaluated three analytical methods for determining inorganic phosphorus in serum applied to the Technicon RA-I000 analyzer: a fully enzymatic colorimetric method based on the specific system purine nucleoside phosphorylase/xanthine oxidase coupled to an indicator colorimetric reaction similar to the Trinder reaction; a chemical method involving the direct UV measurement of the phosphomolybdate complex; and a chemical method with reduction of the phosphomolybdate complex to molybdenum blue. Experiments were performed to assess within-run and between-day precision, linearity, interferenc

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Liu, Xiaoting, Dan Wu, Abbas Ali Abid, Ying Liu, Jianfeng Zhou, and Qichun Zhang. "Determination of Paddy Soil Ammonia Nitrogen Using Rapid Detection Kit Coupled with Microplate Reader." Toxics 10, no. 12 (2022): 725. http://dx.doi.org/10.3390/toxics10120725.

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Indophenol blue colorimetry has been widely used for determining soil ammonia nitrogen, but this method has some disadvantages, such as complex reagent preparation, high toxicity, and long colorimetric time. Hence, we aimed to develop a rapid soil ammonia nitrogen determination method using a rapid detection kit. In order to select a suitable extractant, different concentrations of KCl and NaCl solutions were used to extract soil. The ammonia nitrogen content in different types of soils was determined using a rapid detection kit (purchased from Zhejiang Luheng Environmental Technology Limited

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Xu, Jing Ya, Hao Xue Liu, and Min Huang. "Discussion on Colorimetric Computation Method of LCD Display." Advanced Materials Research 174 (December 2010): 68–71. http://dx.doi.org/10.4028/www.scientific.net/amr.174.68.

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The display colorimetric accuracy is a key factor to ensure printing quality. The main mission for display’s color management is to compute its display color to get accurate colorimetric characterization, namely to ascertain the converting relationship between the RGB color data and their corresponding CIE X Y Z values. The related color values of EIZO, Mac and common PC displays were measured in the experiment, fitted the parameter, and computed the displayed color with gain-offset-gamma(GOG)model.Two-Primary Crosstalk (TPC) model, Piecewise Partition (PP)model. The three models were analyzed

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Li, Yonggang, Xingsheng Liu, Guannan Zhang, et al. "Rapid and selective on-site detection of triacetone triperoxide based on visual colorimetric method." Journal of Chemical Research 46, no. 4 (2022): 174751982211174. http://dx.doi.org/10.1177/17475198221117409.

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In this work, a visual colorimetric method for the rapid and selective detection of triacetone triperoxide is reported. This visual colorimetric method is based on the reaction between potassium titanyl oxalate and hydrogen peroxide (H2O2) released from triacetone triperoxide degradation. Potassium titanyl oxalate can selectively react with H2O2 to form peroxo-titanic acid (an orange complex), enabling the colorimetric detection of triacetone triperoxide. Based on the theory that triacetone triperoxide produces hydrogen peroxide under acidic conditions, acid types, acid concentration, response

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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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Quispe-Quispe, Arturo, Liz N. Huamani Navarro, and Ruth M. Ccopa Flores. "Colorimetric and Textile Properties of Huacaya Alpaca Fibers Dyed With Cochineal: A Sustainable Approach." Revista de Gestão Social e Ambiental 19, no. 1 (2025): e011033. https://doi.org/10.24857/rgsa.v19n1-150.

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Objective: To investigate the colorimetric and textile properties of Huacaya alpaca fibers dyed with cochineal, promoting a sustainable approach in the textile industry through the use of natural resources and traditional methods, improving product quality and minimizing environmental impact. Theoretical Framework: The main concepts and theories that support the research on the colorimetric and textile properties of Huacaya alpaca fibers dyed with cochineal dye are presented, focusing on sustainability. Method: The methodology included a randomized experimental design with a factorial arrangem

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Dr., Khaled Taha Muhammad Abu thaher. "Colorimetric Method for Determination of Anthraquinone in root of Rheum palaestinum Feinbrun." INTERNATIONAL JOURNAL OF SCIENTIFIC DEVELOPMENT AND RESEARCH 9, no. 8 (2024): 434–39. https://doi.org/10.5281/zenodo.13341936.

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This study aims to shed light on methods for determining the quantities of various anthraquinone derivatives mentioned in the pharmacopoeia of countries around the world. It also aims to determine the amount of anthraquinone derivatives in the roots of Palestinian rhubarb (Rheum palaestinum Feinbrun) using the colorimetric method provided by the State Pharmacopoeia of the USSR.  The results of a study to determine the amount of anthraquinone derivatives in Palestinian rhubarb roots using the colorimetric method showed that the roots contain (3.41%) of anthraquinone derivatives. The result

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Dr., Khaled Taha Muhammad Abu thaher. "Colorimetric Method for Determination of Anthraquinone in root of Rheum palaestinum Feinbrun." INTERNATIONAL JOURNAL OF SCIENTIFIC DEVELOPMENT AND RESEARCH 9, no. 8 (2024): 434–39. https://doi.org/10.5281/zenodo.13354092.

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This study aims to shed light on methods for determining the quantities of various anthraquinone derivatives mentioned in the pharmacopoeia of countries around the world. It also aims to determine the amount of anthraquinone derivatives in the roots of Palestinian rhubarb (Rheum palaestinum Feinbrun) using the colorimetric method provided by the State Pharmacopoeia of the USSR.  The results of a study to determine the amount of anthraquinone derivatives in Palestinian rhubarb roots using the colorimetric method showed that the roots contain (3.41%) of anthraquinone derivatives. The result

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Bello, Thaísa B., Anderson G. Costa, Thainara R. da Silva, Juliana L. Paes, and Marcus V. M. de Oliveira. "Tomato quality based on colorimetric characteristics of digital images." Revista Brasileira de Engenharia Agrícola e Ambiental 24, no. 8 (2020): 567–72. http://dx.doi.org/10.1590/1807-1929/agriambi.v24n8p567-572.

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ABSTRACT Results of evaluations using optical evaluation methods may be correlated with tomato quality and maturation. In this context, the objective of this study was to evaluated the correlation between tomato colorimetric and physico-chemical variables, clustering them as a function of maturation stages, using multivariate analysis. The experiment was conducted using 150 fruits and three maturation stages (immature, light red and mature). The physico-chemical variables were evaluated through traditional methods. The colorimetric variables were assessed on images in RGB color model taken wit

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Du, Bin, Shu Geng, Wei Cao, et al. "Investigation of the Colorimetric Characteristics of VX in Squaraine-Based Solutions." Chemosensors 11, no. 2 (2023): 137. http://dx.doi.org/10.3390/chemosensors11020137.

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Colorimetry is an important on-site detection method for organophosphorus compounds. O-Ethyl S-(2-diisopropylaminoethyl) methylphosphonothioate (VX) is recognized as one of the deadliest organophosphorus chemical agents, and the rapid on-site detection of VX is of great significance to public safety. In this paper, a squaraine derivative was synthesized as probe molecules, and the sensing characteristics of VX in a colorimetric solution system containing tetrabutylammonium fluoride (TABF) were studied with UV−Vis spectroscopy, nuclear magnetic resonance (1H NMR), and mass spectrometry. The res

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Dorozhko, Vladyslav, Nataliia Holembovska, Nataliia Slobodianiuk, et al. "Enhancing fish pâté with non-traditional ingredients: maca root, broccoli, and beetroot." Scifood 19 (April 22, 2025): 192–207. https://doi.org/10.5219/scifood.24.

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The article substantiates the feasibility of using and combining freshwater fish with non-traditional raw materials (maca root, broccoli, beetroot). Positive results of sensory, organoleptic, colorimetric analysis of fish pâtés using the flavor profile method and establishing their compliance with a hypothetical standard are presented. The feasibility of using the flavor profile method and colorimetric methods to assess the overall impression of fish pâtés for expanding biologically significant food products was shown. Based on the results of consumer preferences, the authors used 10 descripto

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LUTWICK, GERALD W., GORDON R. WEBSTER, and BYRON KRATOCHVIL. "A COMPARISON OF THREE METHODS FOR DETERMINING CALCIUM ION ACTIVITY IN SOIL SOLUTIONS." Canadian Journal of Soil Science 68, no. 2 (1988): 433–41. http://dx.doi.org/10.4141/cjss88-040.

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Calcium ion activity, (Ca2+), in 37 soil solutions was determined using species calculation, potentiometric (ion selective electrode), and colorimetric (tetramethylmurexide) methods. Agreement among the three estimates of (Ca2+) was tested by comparing the potentiometric and colorimetric methods to the species calculation method. Good agreement was observed between (Ca2+) estimates using the potentiometric and species calculation methods. Percent relative error between the two methods was less than 5% for 76% of the soil extracts and less than 10% for 85% of the soil extracts. Differences are

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Bourgeois, D., F. Carrouel, J. C. Llodra, M. Bravo, and S. Viennot. "A Colorimetric Interdental Probe as a Standard Method to Evaluate Interdental Efficiency of Interdental Brush." Open Dentistry Journal 9, no. 1 (2015): 431–37. http://dx.doi.org/10.2174/1874210601509010431.

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The aim of this study is to evaluate the concordance between the empirical choice of interdental brushes of different diameters compared to the gold standard, the IAP CURAPROX© calibrating colorimetric probe. It is carried out with the aim of facilitating the consensus development of best practices. All the subjects’ interproximal spaces were evaluated using the reference technique (colorimetric probe), then after a time lapse of 1.2 ± 0.2 hours, using the empirical clinical technique (brushes) by the same examiner. Each examiner explored 3 subjects. The order the patients were examined with t

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KANAPATHIPILLAI, WIGNARAJAH. "An Improved Lindemann Method for Colorimetric Determination of Inorganic Phosphate in Biological Samples." Journal of Indian Chemical Society Vol. 85, Mar 1988 (1988): 229–31. https://doi.org/10.5281/zenodo.6343140.

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Centre for Arid Zone Studies, U. C. N<em>. </em>W., Bangor, Gwynedd LL57 2UW, Wales, United Kingdom <em>Manuscript received 21 April 1988, revised 3 September 1987, accepted 13 January 1988</em> An Improved Lindemann Method for Colorimetric Determination of Inorganic Phosphate in Biological Samples.

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Cobb, B. G., and D. B. Schoelles. "Rapid Method for Determining Amylose Using a Microplate Reader." HortScience 24, no. 3 (1989): 487–88. http://dx.doi.org/10.21273/hortsci.24.3.487.

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Abstract The microplate reader is becoming a common research laboratory instrument that can be adapted to accelerate many colorimetric assays. A colorimetric method has been modified to allow the use of a microplate reader for determining amylose levels in starch from potatoes (Solanum tuberosum L.). The time needed for measuring the absorbance of many amylose samples was significantly reduced over the spectro-photometric method. The method has been shown to be accurate and reproducible.

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Parker, Gregory B., Olin D. Smith, and W. James Grichar. "Colorimetric Assessment of Pod Disease in Peanuts: Comparison with Visual Methods and Efficacy of Use in Selection1." Peanut Science 16, no. 2 (1989): 76–82. http://dx.doi.org/10.3146/i0095-3679-16-2-5.

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Abstract Colorimetry was evaluated as a method to assess pod disease in peanuts (Arachis hypogaea L.) caused primarily by Pythium myriotylum Drechs., Sclerotium rolfsii Sacc., and Rhizoctonia solani Kuhn. Data analyzed were from nineteen replicated tests conducted from 1982 to 1987, exclusive of 1985, in three South Texas locations. Each plot was scored for pod disease colorimetrically and visually. A negative linear relationship (R2&gt;96%) was found between Hunter color values (L and b) and percent infection measured visually for samples hand selected to approximate eleven disease levels

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Lee, Yubeen, Izzati Haizan, Sang Baek Sim, and Jin-Ha Choi. "Colorimetric Biosensors: Advancements in Nanomaterials and Cutting-Edge Detection Strategies." Biosensors 15, no. 6 (2025): 362. https://doi.org/10.3390/bios15060362.

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Colorimetric-based biosensors are practical detection devices that can detect the presence and concentration of biomarkers through simple color changes. Conventional laboratory-based tests are highly sensitive but require long processing times and expensive equipment, which makes them difficult to apply for on-site diagnostics. In contrast, the colorimetric method offers advantages for point-of-care testing and real-time monitoring due to its flexibility, simple operation, rapid results, and versatility across many applications. In order to enhance the color change reactions in colorimetric te

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Liu, Huiqiao, Pengfei Rong, Hongwei Jia, et al. "A Wash-Free Homogeneous Colorimetric Immunoassay Method." Theranostics 6, no. 1 (2016): 54–64. http://dx.doi.org/10.7150/thno.13159.

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Durward, Elaine, and William J. Harris. "Colorimetric Method for Detecting Amplified Nucleic Acids." BioTechniques 25, no. 4 (1998): 608–14. http://dx.doi.org/10.2144/98254st01.

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Yalçin, A. S., G. Haklar, and K. Emerk. "Simple colorimetric method for determination of peroxide." Clinical Chemistry 39, no. 12 (1993): 2534–35. http://dx.doi.org/10.1093/clinchem/39.12.2534.

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Sasaki, Akira, Hideo Aoyama, Tomomi Honda, and Yoshiro Iwai. "116 Colorimetric Test Method for Oil Contamination." Proceedings of the Symposium on Evaluation and Diagnosis 2009.8 (2009): 74–78. http://dx.doi.org/10.1299/jsmesed.2009.8.74.

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Ryu, Wang-Kyun, Hee-Woong Kim, Geun-Dong Kim, and Hae-Ik Rhee. "Rapid determination of capsaicinoids by colorimetric method." Journal of Food and Drug Analysis 25, no. 4 (2017): 798–803. http://dx.doi.org/10.1016/j.jfda.2016.11.007.

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Abdulkadir, Maadh Qusay, May Mohammed Jawad Al-Mudhafar, Amera Abbas Mohammed, and Suha K. Alzahawie. "COLORIMETRIC ASSAY OF ASPIRIN USING MODIFIED METHOD." Journal of Al-Nahrain University Science 12, no. 3 (2009): 1–7. http://dx.doi.org/10.22401/jnus.12.3.01.

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Gnat, Daniella, Ann D. Dunn, Samar Chaker, Francois Delange, Francoise Vertongen, and John T. Dunn. "Fast Colorimetric Method for Measuring Urinary Iodine." Clinical Chemistry 49, no. 1 (2003): 186–88. http://dx.doi.org/10.1373/49.1.186.

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Rowell, Michael J. "Colorimetric method for CO2 measurement in soils." Soil Biology and Biochemistry 27, no. 3 (1995): 373–75. http://dx.doi.org/10.1016/0038-0717(94)00218-p.

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Larabi, M. C., N. Richard, and C. Fernandez. "A New Quantification Method under Colorimetric Constraints." Conference on Colour in Graphics, Imaging, and Vision 1, no. 1 (2002): 412–15. http://dx.doi.org/10.2352/cgiv.2002.1.1.art00087.

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