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- [4] RAPID EXTRACTION AND DIRECT SPECTROPHOTOMETRIC DETERMINATION OF IRON(III) WITH THIOTHENOYLTRIFLUOROACETONE FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE, 1973, 265 (05): : 348 - 348
- [8] EXTRACTIVE SPECTROPHOTOMETRIC DETERMINATION OF MANGANESE WITH THIOTHENOYLTRIFLUOROACETONE FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE, 1975, 275 (04): : 286 - 286