摘要
[目的]建立一种土壤样品的测定方法。[方法]将电镀厂周围土壤样品,磨碎,过130目筛,取1.000 g土壤样品于聚四氟乙烯坩埚中,加入10 ml H2O2放置过夜,在微波炉中消解至近干;加15 ml浓HCl、5 ml浓HNO3消解至近干,再加5 ml HF,继续消解至粘稠状,用去离子水低温溶解残渣,转入25 ml容量瓶中,加5%HNO3定容,用ICP-AES法测定土壤中的Zn、Ni、Cr、Cu。[结果]在选定的测定条件下,检出限分别为0.005 2、0.013、0.006 9、0.009 6 mg/L;精密度的相对标准偏差分别为2.4%、2.9%、2.1%、3.4%;回收率在98.3%～103.7%。[结论]该测定方法灵敏、精密、准确度高;电镀厂周围土壤已经受到了影响,应严格加强管理。
[Objective]The aim of the study was to find a way to measure soil sample.[Method]The soil sample was obtained from peripheral of electroplating factor,milled and separated by screen grit 130.Take 1.000 g soil sample into teflon pot,put in 10 ml H2O2 for a whole night and clear them up to end in micro-wave stove.Then put in 15 ml strong HCl and strong 5 ml HNO3,and also clear them up to end in micro-wave stove.After that,put in another 5 mL HF and continue to clear them up till they become a kind of stick substance,use water dissolving leavings,transfer them into 25 ml content bottle,put in 5% HNO3 to fix them,and use ICP-AES to measure Zn,Ni,Cr,and Cu in soil sample.[Result]Under the determining situation,it could detect out 0.005 2,0.013,0.006 9 and 0.009 6 mg/L,the relative standard deviation of precision was 2.4%,2.9%,2.1% and 3.4% separately,the percent recovery of Zn was between 98.3% and 103.7%.[Conclusion]The above measure was sensitive,precise and exact.And the result indicates that the soil of peripheral of electroplating factor was polluted and should be under strict control.
出处
《安徽农业科学》
CAS
北大核心
2011年第8期4669-4670,共2页
Journal of Anhui Agricultural Sciences
基金
河南省2008年科技发展计划项目(082102270046)
