摘要
采用碱消解-火焰原子吸收分光光度法测定固体废物中的六价铬,样品消解温度控制在90℃～95℃范围内,消解时间为1 h,消解液pH值调节至9.0±0.2。方法检出限与测定下限分别为0.05 mg/kg与0.20 mg/kg,对不同基体实际样品平行测定的RSD为1.4%～13.0%,加标回收率为93%～130%。
A method for determining Cr（VI） in the solid waste by alkali digestion-atomic absorption spec- trophotometry was developed. The pre-treatment conditions were discussed. The optimum digestion temperature of the samples should be at 90 ℃ -95 ℃, the digestion time was 60 minutes, and pH of the digestion fluid was 9.0 ＋ 0.2. The detection limit and reliable quantitation limit of this method were O. 05 mg/kg and 0.20 mg/kg respectively,the RSD of actual sample on the different matrix was 1.4% - 13.0% ,spiking recovery was 93% ~ 130%.
出处
《环境监测管理与技术》
2012年第6期57-59,共3页
The Administration and Technique of Environmental Monitoring
关键词
六价铬
碱消解
火焰原子吸收分光光度法
固体废物
Hexavalent chromium
Alkali digestion
Flame atomic absorption spectrometry
Solid wastes
