原子吸收法测定水中锌质量控制指标研究

根据地域和监测技术代表性的筛选,在11个省份中选择了70家实验室参加测试工作,通过大量的监测数据,研究了原子吸收分光光度法测定水中锌的质量控制指标。研究表明:在0.3～1.5mg/L范围内,标准样品RSD≤3.0%,RSD’≤10.0%;浓度小于等于0.5mg/L时RE在±10.0%范围内,浓度为0.5～1.5mg/L时RE在±5.0%范围内。实际样品浓度小于等于0.05mg/L时,RD≤20.0%;浓度0.05～3.5mg/L时,RD≤5.0%。加标回收率控制范围为85%～110%。

The Quality Control Index on Atomic Absorption Spectrometry for the Analysis of Zinc in Water

This article according to representative screening of regional and monitoring technology, we chose 70 laboratories from 11 provinces to analyzed the samples by atomic absorption spectrometry. On the basis of a large number of monitoring data, we studied the QC index of the zinc in water,and compared with the QC index in references.Studies indicated that the RSD (within-laboratory relative standard deviation)control limit of standard samples which concentration was between 0.3mg/L and 1.5mg/L was less than 3.0%, RSD' (inter-laboratory relative standard deviation)was less than 10%. RE (relative error ) was controlled within ±10% when the concentration was below 0.5mg/L, and ±5.0% when the concentration was between 0.5mg/L and 1.5mg/L. RD (relative deviation) of actual samples was less than 20.0% which concentration was below 0.05mg/L, and less than 5% which the concentration between 0.05mg/L and 3.5mg/L. The recovery rates can be ranged between 85% and 110%.