Reference

Identification of hydrocarbon markers in oil-polluted waters by use of column and thin-layer chromatography

Identification of hydrocarbon markers in oil-polluted waters by use of column and thin-layer chromatography. Whittle, P. J. (Rivers Div. Lab., North West Water Auth., Warrington, Engl.). Analyst (London), 102(1221), 976-8 (English) 1977. CODEN: ANALAO. ISSN: 0003-2654. DOCUMENT TYPE: Journal CA Section: 61 (Water) Section cross-reference(s): 51 Gas oil-contaminated water (1 L) was acidified to pH 2 with concd. HCl, shaken 1 h with 25 mL light petroleum on elec. driven rollers, and the upper layer was removed, dried over anhyd. Na2SO4, and passed down a short column of Florisil preequilibrated with light petroleum, the bulk eluates being retained for identification of the oil. Quinizarin [81-64-1] and C.I. Solvent Red 24 [85-83-6] hydrocarbon markers were retained on the column. C.I. Solvent Red 24 was eluted with Me2CO and quinizarin was eluted with 4 vol. % HCO2H in Me2CO. Both eluates were evapd. to dryness, dissolved in 8-12 mL Me2CO, and developed by thin-layer chromatog. on silica gel-impregnated glass fiber with hexane-toluene-AcOH (3:3:0.2). C.I. Solvent Red 24 appeared as a pink spot, Rf 0.4, and quinizarin gave a yellow fluorescent spot under UV light, Rf 0.6. The detection limits are 12 and 30 ng for quinizarin and C.I. Solvent Red 24, resp., and the recoveries are ~50%.

Spectral sensitization of photoelectrochemical processes on bismuth oxyhalides by organic dyes

Spectral sensitization of photoelectrochemical processes on bismuth oxyhalides by organic dyes.Chemical with cas number 81-88-9 also plays role. Poznyak, S. K.; Kulak, A. I. (Beloruss. Gos. Univ., Minsk, USSR). Khim. Vys. Energ., 19(2), 128-32 (Russian) 1985.Several substances like 81-88-9 may be metioned in this study. CODEN: KHVKAO. ISSN: 0023-1193. DOCUMENT TYPE: Journal CA Section: 52 (Electrochemical, Radiational, and Thermal Energy Technology) Section cross-reference(s): 41, 73 The spectral sensitization of photoelectrochem. processes on BiOX (X = Cl, Br, I) electrodes by various dyes (Rhodamine B [81-88-9], Rhodamine 6G [989-38-8], 1,4-dihydroxyanthraquinone [81-64-1], etc.) was studied. The quantum yield of the sensitized photocurrent on BiOCl and BiOBr electrodes increased by a factor of 5-10 to 0.01-7% in the presence of hydroquinone [123-31-9]. The stability of sensitized electrodes can be increased by establishing a dynamic equil. between the adsorbed and dissolved dye. ..