液相色谱法测定土壤中的丙烯酸

Determination of acrylic acid in soil by liquid chromatography

选取3种不同类型的土壤样品,分别考察了提取方式、提取时长、提取温度和提取液固比对土壤中丙烯酸提取效率的影响,优化了提取条件,建立了土壤中丙烯酸的检测方法。研究表明,用纯水作为提取剂对土壤中的丙烯酸按照液固比5∶1进行提取,采用液相色谱法测定,该检测方法的线性良好,相关系数达到0.9993。当称样量为10.0 g时,该方法检出限为0.2 mg·kg^(-1);对不同类型的土壤进行低、中、高浓度加标,丙烯酸的加标回收率在96.3%~107.0%;重复测定6组样品,其精密度相对标准偏差为1.2%~4.9%。将该方法用于造纸污染场地丙烯酸的检测,检出浓度范围为8.9~12.2 mg·kg^(-1),证明该方法适用于土壤中丙烯酸的检测。

Three types of soil samples were selected,and the effects of extraction types,extraction time,extraction temperatures and extraction liquid-solid ratios on the extraction efficiency of acrylic acid in soil were investigated.The extraction conditions were optimized,and a detection method of acrylic acid in soil was established.The results show that the acrylic acid in soil is extract by pure water as extraction agent with the liquid-solid ratio of 5∶1,and determined by liquid chromatography.The linearity of the detection method is good,and the correlation coefficient reaches 0.9993.When the sample weight is 10.0 g,the detection limit of the method is 0.4 mg·kg^(-1).When different types of soils are spiked with low,medium and high concentrations of acrylic acid,the recovery of acrylic acid is 96.3%~107.0%.The relative standard deviation of the method is 1.2%~4.9%when six groups of samples are measured repeatedly.This method is applied to detect the concentration of acrylic acid in soil from paper mill and the obtained concentration range is 8.9~12.2 mg·kg^(-1),demonstrating the method is suitable for the detection of acrylic acid in soil.