PT Journal AU Nise, G Vesterberg, O TI Direct determination of chromium in urine by electrothermal atomic absorption spectrometry. SO Scandinavian Journal of Work, Environment & Health PD 12VL PY 1979 BP 404 EP 410 IS 4 DI 10.5271/sjweh.2642 WP https://www.sjweh.fi/show_abstract.php?abstract_id=2642 DE absorption spectrometry; atomic absorption spectrometry; chromium; direct determination; electrothermal atomic absorption spectrometry; spectrometry; urine SN 0355-3140 AB

A simple, direct method for the determination of chromium levels in urine is described, electrothermal atomic absorption spectrometry having been used after the urine samples had been acidified. The optimal conditions at the ashing and atomization stages was determined. The detection limit of this method is 5 nmol/1, and the coefficient of variation (within day) is about 3% in the concentration range 20-400 nmol/1. Use of a low temperature asher with electrically excited oxygen before analysis gave results similar to those of the direct procedure. Good correlation was obtained from two other laboratories using different instruments and pretreatments.

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