废水中Cr^(6+)的离子树脂交换-电感耦合等离子体质谱法测定

Determination of Cr^(6+) Content in Wastewater by ICP-MS

废水中的Cr^(6+)经H-732苯乙烯型强酸性阳离子树脂交换分离后,浓缩。用电感耦合等离子体质谱法(ICP-MS)检测,该法的线性范围为0～100ng.mL^(-1)、线性相关系数R^2=0.9997、检出限为0.02ng.mL^(-1)(3δ)、加标回收率为88%～105%,相对标准偏差≤5%。

The Cr6＋ content in wastewater was detected by ICP-MS after it was separated by H-732 type strong acidic cationic exchange resin and concentrated. The results showed that the linear range was 0 - 100 ng·mL^-1, the linear correlation coefficient R2 = 0.9997, the detection limit 0.02 ng·mL^-1 （3δ）, the average recovery was 88%-105%, and relative standard deviation ≤5%.