Determination of cadmium in human urine using electrothermal atomic absorption spectrometry with probe atomization and deuterium background correction
- 1 January 1992
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Analytical Atomic Spectrometry
- Vol. 7 (7) , 1079-1083
- https://doi.org/10.1039/ja9920701079
Abstract
A procedure for the determination of cadmium in human urine using electrothermal atomic absorption spectrometry with probe atomization and deuterium background correction is described. The human urine samples were diluted 1 + 3 with ultrapure water and no chemical modifier or sample pre-treatment was necessary, thus reducing the risk of contamination. The concentration of cadmium in human urine was evaluated directly by aqueous standard calibration (avoiding the time-consuming technique of standard additions). The precision at a cadmium level of 3.5 ppb was ± 2%. The detection limit observed (using the ‘three times the standard deviation of the blanks’ criterion) was 0.3 µg dm–3 of cadmium. The recovery of cadmium obtained from urine was 100 ± 5%. The method is especially suitable for biological monitoring of cadmium in occupationally exposed persons.Keywords
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