冷溶提取土壤和沉积物中砷的快速消解方法研究  

Determination of Arsenic in Soil and Sediment by Cold Dissolution

作　　者：梁志尧 廖文晋 LIANG Zhiyao;LIAO Wenjin(Guangdong Calibration Environmental Science Co.,Ltd.,Zhuhai 519090,China)

机构地区：[1]广东标定环境科学有限公司,广东珠海519090

出　　处：《山东化工》2024年第20期248-250,共3页Shandong Chemical Industry

摘　　要：本研究拟使用室温逆王水冷溶提取消解处理联合原子荧光法创建一种土壤中沉积物中砷元素的新测定方法:采用5 mL逆王水作为冷溶处理土壤和沉积物样品中砷的提取介质,使用原子荧光法进行测定。结果表明:当土壤样品量为0.1000 g,定容体积为25 mL时,本研究在标准溶液浓度范围为0.0~10.0 mg/L,相关线性系数为0.9992,砷的检出限为0.000367 mg/kg。在五种浓度梯度的标准物质测定结果均在标准值范围内,相对误差介于2.22%~5.81%。对高、中、低3种标准物质连续6次的测定结果RSD分别为5.42%,3.04%,2.94%。采用HJ 680的方法与本研究对2个实际样品进行方法比对的相对偏差分别为2.75%,1.67%;向不同浓度梯度的样品中进行加标回收实验的结果分别为94.0%~102%,95.5%~105%。In this study,a new determination method of arsenic in soil and sediment was constructed by the atomic fluorescence with 5 mL of lefort aqua regia was used as the dissolution to treat soil and sediment samples.The results showed that when the soil sample was 0.1000 g and the fixed volume was 25 mL,the concentration range of the standard solution was 0.0~10.0 mg/L,the correlation coefficient was 0.9992,and the detection limit of arsenic was 0.000367 mg/kg.The test results of five different concentration levels were within the range of standard values,with the relative error ranging between 2.22%and 5.81%.The RSD of the high,medium and low standard substances was 5.42%,3.04%and 2.94%.The relative deviation of the method comparison between HJ 680 and the present study is 2.75%and 1.67%;the spike recovery rate of different gradients are 94.0%~102%and 95.5%~105%.

关 键 词：逆王水 冷溶 砷 土壤 沉积物 

分 类 号：X703.1[环境科学与工程—环境工程]