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% 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% .%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％.
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