Results 251 to 260 of about 362,643 (306)

Hydrazones of Isoniazid for Colorimetric Analysis

Journal of Pharmaceutical Sciences, 1977
Two sensitive color reactions of isoniazid are described. They are based on the formation of hydrazone Schiff bases when isoniazid is reacted with 4-nitrobenzaldehyde or pyridoxal. Linear curves were obtained with both reagents when absorbance values were plotted against concentrations.
P R, Shah, R R, Raje
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Colorimetric Analysis of Dye Mixtures*

Journal of the Optical Society of America, 1949
Distributions of chromaticities have been computed for 171 pairs of typical dyes, involving five yellows, nine cyans, and nine magentas. Beer’s law was assumed, and the computations were performed on automatic, punched-card computing and tabulating machines. A selected ordinate method was used.
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Analysis of molluscan sterols: Colorimetric methods

Lipids, 1984
AbstractThe wide variety of sterols normally found in extracts of bivalve molluscs leads to high variability in analytical data obtained with colorimetric (chole)sterol methods. Total sterol levels in oyster (Crassostrea virginica) extracts were determined using the Liebermann‐Burchard reagent, an acid‐FeCl3 reagent and a cholesterol oxidase procedure.
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Differential colorimetric analysis of some deoxyribosyl compounds

Archives of Biochemistry and Biophysics, 1960
Abstract Simple procedures are described for the estimation of purine deoxyribonucleosides and deoxyribonucleotides. The nucleosides are hydrolytically cleaved at pH 2 and oxidized by periodate at room temperature. Under such conditions, the nucleotides are not oxidized, but they may be hydrolyzed and oxidized by periodate at 70 °.
L D, SASLAW, V S, WARAVDEKAR
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Determination of sulphate by automatic colorimetric analysis

The Analyst, 1968
An automatic colorimetric method for determining sulphate in natural water in the range of 5 to 400 mg per litre is presented. The method is based on the precipitation of barium sulphate and the release of the coloured acid chloranilate ion. A manifold has been developed for the determination of sulphate on the Technicon AutoAnalyzer.
M E, Gales, W H, Kaylor, J E, Longbottom
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Colorimetric Oil Analysis for Titanium.

1982
Abstract : The goal of this research contract was to develop a rapid flight-line method compatible with the Colorimetric Iron Kit for assessing the titanium content in used jet engine lubricating oil. A colorimetric method capable of analyzing for up to 20 ppm titanium was developed for this purpose.
William D. Ross, Mark T. Wininger, William J. Hillan   +2 more
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Colorimetric Analysis of Hexachlorophene in Topical Formulations

Journal of Pharmaceutical Sciences, 1975
The commonly used 4-aminoantipyrine dye formation procedure for hexachlorophene analysis in topical formulations was modified to overcome interference due to other components. Bar soaps and nonemulsion formulations are analyzed directly, employing a chloroform back-extraction stage of the dye prior to quantitation.
W N, French, F, Matsui, S J, Smith, R J, Wood   +3 more
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Colorimetric and photometric absorption analysis

Analytica Chimica Acta, 1948
Abstract A survey is given of colorimetric and photometric absorption analysis. The principles of measuring methods and the main points in the construction of various instruments are discussed.
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Colorimetric Sensor Array for Soft Drink Analysis

Journal of Agricultural and Food Chemistry, 2006
Fourteen commercial soft drinks have been analyzed using colorimetric sensor arrays made from a set of 25 chemically responsive dyes printed on a hydrophobic membrane. Digital imaging of the dye array before and after immersion provides a color change profile as a unique fingerprint for each specific analyte.
Chen, Zhang, Kenneth S, Suslick
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COLORIMETRIC ANALYSIS OF AMMONIA IN WATER

2023
Source: Dissertation Abstracts International, Volume: 37-02, Section: B, page: 7410.
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