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- [5] ANALYTICAL ASPECTS OF SOME AZO DYES FROM CHROMOTROPIC ACID .9. SPECTROPHOTOMETRIC DETERMINATION OF THORIUM WITH 2-(4-SULFO-2-HYDROXYNAPHTHYLAZO)-1,8-DIHYDROXYNPHTHALENE-3,6-DISULFONIC ACID AND 2-(3,6-DISULFO-8-HYDROXYNAPHTHYLAZO)-1,8-DIHYDROXYNAPHTHALENE-3,6-DISULFONIC ACID FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE, 1960, 173 (05): : 377 - 382
- [6] ANALYTICAL ASPECTS OF SOME AZO DYES FROM CHROMOTROPIC ACID .4. SPECTROPHOTOMETRIC DETERMINATION OF THORIUM WITH 2-7-DI-(4-SULPHONAPHTHYL AZO)-1,8-DIHYDROXY NAPHTHALENE-3,6-DISULHONIC ACID (DI-SNADNS) FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE, 1956, 150 (05): : 347 - 355
- [9] HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY OF WATER-SOLUBLE VITAMINS .3. SIMULTANEOUS DETERMINATION OF VITAMIN-B1, VITAMIN-B2, VITAMIN-B6, VITAMIN-B12 AND VITAMIN-C, NICOTINAMIDE AND FOLIC-ACID IN CAPSULE PREPARATIONS BY ION-PAIR REVERSED-PHASE HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY ANALYST, 1987, 112 (07) : 989 - 991