Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Sample mechanical transport means in or for automated...
Patent
1995-11-30
1998-07-21
Alexander, Lyle A.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Sample mechanical transport means in or for automated...
436125, 436 39, G01N 3384, G01N 2177
Patent
active
057831491
ABSTRACT:
Colorimetric methods for determination of residual chlorine, free and combined, in water are described which comprise the use of 3,3',5,5'-tetramethylbenzidine (TMB), as well as methods and kits for determining chlorine in water by visual comparison which comprise, apart from TMB, a calibration scale. The basis for the preparation of one of the kits (or the kit described as an example) lies in the orange color that is produced by means of the reaction between chlorine and TMB, which permits a straightforward determination of residual chlorine by means of a simple visual comparison with a graduated, stable scale that is constituted either by solutions of Tropaeolin O of different concentrations or, alternatively, by a printed scale on plastic material or paper, by etching.
REFERENCES:
patent: 3992158 (1976-11-01), Przybylowicz et al.
patent: 5491094 (1996-02-01), Ramana et al.
F. Bosch Serrat, "Colorimetric Method for Determination of Chlorine with 3,3',5,5'-Tetramethylbenzidine" Talanta, vol. 41, No. 12, 2091-2094, 1994.
Tennant et al., "Classification according to chemical structure, mutagenicity to Salmonella and level of carcinogenicity of a further 39 chemicals tested for carcinogenicity by the U.S. National Toxicology Program", Mutation Research, 257 (1991) 209-227.
Standefer et al., "Use of Tetramethylbenzidine in Plasma Hemoglobin Assay", Clin. Chem. 23/4, 749-751 (1977).
Williams et al., "Substitution of tetramethylbenzidine for benzidine in cyanide analyses", Clinica Chimica Acta, 145 (1985) 113-118.
Attar et al., "Evaluation of a Polymer Film Impregnated with Reagents for the Detection and Determination of Chlorine in Air", Arabian J. for Science and Engineering, vol. 10, No. 2, 107-118, 1984.
Borzova et al., "Benzidine derivatives as reagents for the determination of chlorine", Analytical Chemistry, vol. 55 (1961) 25581.
American Public Health Association, "4500-Cl Chlorine (Residual)", Standard Methods for the Examination of Water and Wastewater, 18th Ed. 1992, 4-36.
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