摘要
比较不同还原时间原子荧光法(AFS)与电感稱合等离子体质谱法(ICP-MS)测定自来水中锑的差异性。AFS法(还原30 min和60 min)和ICP-MS法均线性良好,相关系数分别为0.9994、0.9993和0.9999;检出限均为0.01μg/L;相对标准偏差<2.0%;加标回收率为95.0%~105.0%;有证的质控样测定结果均在不确定度范围内。但对子实际水样,AFS法测锑的质量浓度随还原时间增加显著升高。还原60 min的AFS法测样结果与ICP-MS测样结果的平均值差异相对较小,但仍然偏低。建议在使用AFS法测锑时,适当延长还原时间。
Antimony in water was determined by AFS(under different reduction times)and ICP-MS methods.The linearity was good for antimony determination by AFS and ICP-MS,with correlation coefficients of 0.9994,0.9993 and 0.9999,respectively.Both of the detection limits were 0.01μg/L.The RSDs of both methods were less than 2.0%.The recovery of AFS and ICP-MS were between95.0%~105.0%.The RSDs of certified standard water samples were dropped in the ranges of uncertainty.But for the actual sample,with the lapse of reduction time,concentration of antimony increased significantly.Meanwhile,the results between AFS(under 60 min)and ICP-MS were close.The reduction time should be prolonged if Sb was determined by AFS.
作者
王振华
夏添
华春芳
姜蕾
WANG Zhenhua;XIA Tian;HUA Chunfang;JIANG Lei(Shanghai National Engineering Research Center of Urban Water Resources Co.,Lid.,Shanghai 200082,China)
出处
《净水技术》
CAS
2019年第11期13-17,共5页
Water Purification Technology
基金
上海市科委人才计划项目“水源地典型新型污染物来源解析与源头控制研究”(18XD1420900)
