Author/Editor		Milačič, R; Ščančar, J; Urbanc, M
Title		Is spectrophotometry a reliable technique for determination of Cr(VI) in leather samples?
Type		članek
Source		J Soc Leath Tech Ch
Vol. and No.		Letnik 82
Publication year		1998
Volume		str. 91-4
Language		eng
Abstract		Chromium (VI) in coloured and non-coloured leather samples was determined by the standard spectrophotometric procedure DIN 53314 and also by extraction of the chromium(VI)-HC1 complex (277 K) into methyl isobutyl ketone (MIBK). Chromium(VI) was determined in the organic phase by flame atomic absorption spectrometry (FAAS). Both techniques were found to be sensitive enough for the determination of chromium(VI) in the samples analysed. The limit of detection for the spectrophotometry was 2.0 mg Cr ( VI ) kg-1 and for MIBK extraction 0.2 mg Cr( VI ) kg-1 of leather. The interference effects of coloured species in leather extracts were investigated by employing the spectrophotometric technique. For this purpose diluted and non-diluted sample extracts were analysed. The results obtained were critically evaluated and compared to the MIBK extraction technique. The applicability of the spectrophotometric procedure for determination of chromium(VI) in coloured leather samples was estimated.
Descriptors		CHROMIUM INDUSTRY SPECTROPHOTOMETRY, ATOMIC ABSORPTION SKIN