摘要
目的研究微波消解—原子荧光法测定土壤中汞砷的含量。方法本研究采用微波消解法为前处理方法,通过优化了消解温度、消解液用量等参数,用王水(盐酸和硝酸混合液)进行消解,并用原子荧光法测定样品中汞和砷的含量。结果汞砷标准曲线的相关性系数分别为0.9996和0.9999;方法检出限分别为0.0011、0.0096 mg/kg;平行实验相对标准偏差在1.3%~8.7%,均在10%以内;加标回收率分别在91.2%~117.4%和86.0%~98.0%;有证标准物质测定值均在理论值范围内。结论通过优化消解温度、消解液用量等参数,本方法测定结果准确,简单、可靠、具有较好的实用性。
Objective To study the determination of mercury and arsenic content in soil by microwave digestion/atomic fluorescence method.Methods In this study,microwave digestion was used as the pretreatment,by optimizing the digestion temperature,digestion solution dosage and other parameters,digested with aqua regia(a mixture of hydrochloric acid and nitric acid),and the contents of mercury and arsenic in the samples were determined by atomic fluorescence.Results The results showed that the correlation coefficients of the standard curves of mercury and arsenic were 0.9996 and 0.9999,and the detection limits of the method were 0.0011 mg/kg and 0.0096 mg/kg,respectively.The relative standard deviation of parallel experiments was 1.3%~8.7%,all of which were within 10%.The recoveries were 91.2%~117.4%and 86.0%~98.0%,respectively.The measured values of the certified reference materials are all within the theoretical range.Conclusion By optimizing digestion temperature,digestion solution dosage and other parameters,the method is accurate,simple,reliable and has good practicability.
作者
陈海霞
CHEN Hai-Xia(Guangzhou Jianyan Engineering Testing Service Co.,Ltd.,Guangzhou 510663,China)
出处
《实验室检测》
2024年第11期21-24,共4页
Laboratory Testing
关键词
汞
砷
土壤
微波消解
原子荧光
mercury
arsenic
soil
microwave digestion
atomic fluorescence
