【摘要】 在不同的工作条件下,分析了不同Sn(锡)/Cd(镉)比值下Sn对电感耦合等离子体质谱法(ICP-MS)测定Cd的干扰程度,并将经过在线干扰校正和离线干扰校正后的Cd浓度与标准值比较,实验结果表明:当样品中Sn浓度与Cd浓度比值在2以下时,Sn对Cd的干扰很小,Cd的测定值不用经过任何方式校正也比较接近标准值;当Sn浓度与Cd浓度比值在2~30时,采用离线校正和在线校正后的Cd测定值与标准值均比较接近;当Sn浓度与Cd浓度比值大于30时,采用离线校正才能获得更满意的结果。更多还原

【Abstract】 The spectral interference level of tin(Sn)in the determination of cadmium(Cd)by inductively coupled plasma mass spectrometry(ICP-MS)was investigated with different concentration ratio of Sn/Cd under different work conditions.The content of Cd was obtained by on-line and off-line interference corrections,respectively,which was consistent with the certified value.The results showed that:the contents of Cd maintained good agreement with the certified value without any interference corrections when the concentration ratio of Sn/Cd was below 2 and the effect of Sn on Cd determination was negligible;the contents of Cd corrected by on-line and off-line interference were in accordance with the certified value when the concentration ratio of Sn/Cd was in the range 2~30;satisfactory results were obtained only by off-line interference when the concentration ratio of Sn/Cd exceeded 30.更多还原