Detail of "82-75-7"

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Colorimetric determination of nitrite from meat and other foods: an alternative color reagent for the carcinogenic 1-naphthylamine and an improved extraction method

Colorimetric determination of nitrite from meat and other foods: an alternative color reagent for the carcinogenic 1-naphthylamine and an improved extraction method. Hilsheimer, R.; Harwig, J. (Health Prot. Branch, Health Welfare Canada, Ottawa, Ont., Can.). Can. Inst. Food Sci. Technol. J., 9(4), 225-7 (English) 1976. CODEN: CFSTB3. DOCUMENT TYPE: Journal CA Section: 17 (Foods) Substitution of 5-amino-2-naphthalenesulfonic acid (I) [119-79-9] or 8-amino-1-naphthalenesulfonic acid (II) [82-75-7] for 1-naphthylamine in the colorimetric detn. of NO2- (AOAC, 1975) gave absorptivities almost as large, and at the same wavelength (525 m.mu.); I was preferred to II because it is more easily purified and is more readily sol. in 15% HOAc. The extn. method of Kamm, L., et al. (1965) using comminution with alumina paste gave recoveries approaching 100% with turkey stew, peas, carrots, and broccoli; recoveries from canned luncheon meat were slightly less than by the AOAC method (16.5 vs. 18.5 ppm); the std. errors were 0.3 and 0.5 ppm, resp. 1-Naphthol, 2-amino-1-naphthalenesulfonic acid, 4-amino-1-naphthalenesulfonic acid, and 2-naphthylamine-6-sulfonic acid gave no or little color in the NO2- procedure.

[Passive] coupling reagents for chromatographic detection of diazotizable aromatic compounds (particularly aminobenzophenones; hydrolysis products of benzodiazepine tranquilizers)

[Passive] coupling reagents for chromatographic detection of diazotizable aromatic compounds (particularly aminobenzophenones; hydrolysis products of benzodiazepine tranquilizers). Mueller, R. K.; Lauermann, I. (Inst. Gerichtl. Med., Karl-Marx-Univ., Leipzig, Ger. Dem. Rep.). Krim. Forensische Wiss., (53-54), 184-7 (German) 1984. CODEN: KRFWAG. ISSN: 0023-4702. DOCUMENT TYPE: Journal CA Section: 4 (Toxicology) Section cross-reference(s): 1 Twenty benzene or naphthalene derivs. contg. 1-4 OH- and(or) NH2- and(or) SO3H-groups were coupled (i.e., sprayed as 0.2% EtOH solns.) with 2-amino-5-chlorbenzophenone or 2-amino-5-nitrobenzophenone (acid hydrolysis products of chlordiazepoxide [58-25-3] or nitrazepam [146-22-5], resp.) which were applied on TLC silica gel plates and diazotated by NO-NO2 in gas phase. Most intense red or violet colors were obtained with these 6 naphthalene derivs.: 1-amino-7-naphthol [118-46-7], 5-amino-1-naphthol [83-55-6], 1-aminonaphthalene-4-sulfonic acid [84-86-6], 1-aminonaphthalene-5-sulfonic acid [84-89-9], 1-aminonaphthalene-8-sulfonic acid [82-75-7], and 1-amino-8-naphthol-3,6-disulfonic acid [90-20-0]. 1-Naphthylamine and 2-naphthylamine were also suitable for the detection but are not recommended because of their high carcinogenicity. The sensitivity of all the 8 reagents was equal to or better than that of A. C. Bratton- E. K. Marshall (1939) reagent [N-(1-naphthyl)ethylenediamine]for the detection of the aminobenzophenones on TLC. Sensitivity of the detection was ￡1 mg aminobenzophenone/cm2.