The role of matrix modifier and for the determination of cadmium in blood by graphite furnace atomic absorption spectrometry

흑연로 원자흡수분광법에 의한 혈중 카드뮴 분석시 매트릭스 개선제(matrix modifier)의 역할

  • Received : 1994.09.08
  • Published : 1995.03.25

Abstract

The low concentration of cadmium in the whole-blood was determined by graphite furnace atomic absorption spectrometry(GFAAS) after the sample was diluted five-fold by 1% Triton X-100, 2% $(NH_4)_2HPO_4$ as matrix modifier and pyrocoated graphite tube with L'vov platform was tried remove the interferences of blood matrix and reduce the loss of volatility of cadmium at higher ashing temperature($600^{\circ}C$). The criteria for evaluating the accuracy and precision of this analysis was confirmed by analysis of interlaboratory comparison(Japan) and NIST SRM No. 909(Cd in Serum). The limit of the determination for cadium was 0.1ng/ml and the relative standard deviation(RSD) at 1.0ng/ml level was about 10% for the GFAAS.

Keywords

Cadmium;blood;graphite furnace AAS;L'vov platform