摘要
研究并提出了将测定信号的变化率的导数技术和浓缩待测原子的原子捕集技术与火焰原子吸收相联用测定痕量镉的新技术 .通过测定标准粉煤灰 GBW0 840 1和 82 2 0 1中痕量镉含量验证了该技术的可行性 .与常规法相比 ,新方法的灵敏度和检出限可分别改善 2～ 3个数量级和 1～ 2个数量级 (1～ 3 min捕集条件下 ) .1 0次测定的相对偏差为 6.2 6%～ 7.2 3 % ,回收率可达 95 %～ 1 0 4% .研究表明 ,此技术可成功地测定粉煤灰中的痕量镉 .
A new method was proposed that derivative spectrometry determining signals chang rate and atom trapping technique condensing atom were joined with atomic absorption Spectrometry. The feasibility of the method was certified by determining trace cadmium in standard fly ash(GBW08401 and 82201).Its sensitivity and detection limit are improved by 2~3 orders of magnitude and 1~2 orders of magnitude than those of conditional FAAS with 1~3 min collection time, respectively.The relative deviation is 6.25%~7.23% and recovery ratio reachs to 95%~104%. The results showed that this method was successfully applied to determination of trace heavy mental element Cadmium in fly ash.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
北大核心
2002年第4期432-435,共4页
Journal of Inner Mongolia University：Natural Science Edition
