摘要
目的建立并优化砂砾型土壤的消解方法。方法样品加入逆王水,放置过夜预消解后,以微波消解,再经过双氧水、硝酸、氢氟酸和高氯酸高温消解,赶酸定容;采用原子荧光法测量砷元素(As),原子吸收火焰法测量铬元素(Cr),原子吸收石墨炉法测量铅元素(Pb)。结果土壤质控样品经该方法消解后的As,Pb和Cr测量结果均在质控范围内,偏差较小;消解砂砾型土壤样品并重复试验5次,As,Pb和Cr的相对标准偏差(RSD)分别为2.02%,1.22%和1.21%。结论该方法具有样品前处理简单、重现性好等优点,且处理后的样品可用于多种元素不同仪器的测量,可满足土壤类型中砂砾型土壤筛查和确证分析的要求。
Objective To establish and optimize the digestion method of gravel soil. Methods After pre-digested with chloronitric acid and placed overnight, the samples were digested by microwave, then digested by hydrogen peroxide, nitric acid, hydrofluoric acid and perchloric acid, drove acid and fixed volume. The arsenic(As) was measured with atomic fluorescence spectrometry, chrome(Cr) with atomic absorption flame, and plumbum(Pb) with atomic absorption graphite furnace. Results After the soil samples for quality control were digested with this method, the results of measurement of As, Pb and Cr were all within the quality control range, with small deviation. Repeated the measurement 5 times, the relative standard deviation(RSD) of As, Pb and Cr was 2.02%, 1.22% and 1.21%, respectively. Conclusions This method is of the advantages of simple sample pretreatment and good reproducibility. After processed, the samples can be taken for the measurement of multi elements with different instruments, and the method meets the requirements of screening and confirmatory analysis of gravel soil.
作者
庹见伟
刘君
邢雪岩
荣晓夙
TUO Jian-wei;LIU Jun;XING Xue-yan;RONG Xiao-su(The Center for Disease Control and Prevention of Akesu Prefecture,Akesu,Xinjiang 843000,China)
出处
《疾病预防控制通报》
2021年第2期80-81,84,共3页
Bulletin of Disease Control & Prevention(China)
关键词
砂砾型土壤
微波消解
重金属元素
Gravel soil
Microwave digestion
Heavy metal elements
