Detail of "846-70-8"

Reference

Determination of synthetic dyes in foods by paper chromatography and thin-layer chromatography

Determination of synthetic dyes in foods by paper chromatography and thin-layer chromatography. Zeng, Hanhe; Fan, Chongyang (Wuhan Inst. Qual. Control Commer. Prod., Wuhan, Peop. Rep. China). Shipin Yu Fajiao Gongye, (2), 35-42 (Chinese) 1984. CODEN: SPYYDO. DOCUMENT TYPE: Journal CA Section: 17 (Food and Feed Chemistry) Synthetic dyes used in food processings were detd. by silica gel TLC and paper chromatog. using EtOAc-MeOH-28% NH4OH (3:1:1) and BuOH-EtOH-1% NH4OH (6:2:3) as the mobile phase, resp. When 7 commonly used food dyes were applied on the silica gel thin-layer and developed with the above solvent system, the dyes appeared in the order of naphthol yellow [846-70-8], orange yellow S [2783-94-0], indigo [482-89-3], carmine [1390-65-4], amaranth [915-67-3], tartrazine [1934-21-0], and brilliant blue [2650-18-2] with corresponding Rf values of 0.80, 0.60, 0.47, 0.25, 0.20, 0.17, and 0.15, resp. When these dyes were sepd. on paper chromatog. and developed with the above solvent system, the dyes appeared in the order of naphthol yellow, orange yellow S, carmine, indigo, amaranth, tartrazine, and brilliant blue with Rf values of 0.62, 0.51, 0.33, 0,33, 0.24, 0.21, and 0.12, resp. The min. detectable amt. by these methods was 0.05 mg. A linear concn.-dependent relation was obsd. in the range of 0.1-0.5 mg, and the av. recovery for 200 mg of the dyes was in the range from 90% (indigo) to 99% (brilliant blue). These TLC and paper chromatog. systems were used to det. synthetic dye contents in food, including chocolate, fruit drops, carbonated wine, red wine, soft drinks, orange drink powder, and haw ball.

Ozone treatment of wastewaters

Ozone treatment of wastewaters. Kozuka, Junji; Koyama, Masao; Sato, Yuichi (Tokyo Shibaura Electric Co., Ltd., Japan). Japan. Kokai JP 52099646 20 Aug 1977 Showa, 2 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C02C005-04. APPLICATION: JP 76-14956 16 Feb 1976. DOCUMENT TYPE: Patent CA Section: 60 (Sewage and Wastes) Section cross-reference(s): 39 Org. wastewaters contg. O3 decomposable matter are treated with O3 and insol. acids. The method is used to decompn. dyes in the wastewaters. Thus, a wastewater contg. 1000 ppm naphthol yellow [846-70-8] was mixed with 1.0 g magnesium silicate catalyst/0.7 L wastewater, then treated with 5 mg O3/min. The wastewater was 100% decolorized in 25 min.