CAJ | 학술논문

建立了一种快速测定土壤中氯化苦残留的方法.用石油醚室温下浸提土壤30 min后漩涡振荡,离心后取上清液直接采用顶空气相色谱法测定.结果显示,在质量浓度0.005 ～4 mg/L范围内,线性相关系数R~2=0.999.氯化苦的添加水平在0.012 5 ～1.25 mg/kg范围内,5次重复的平均添加回收率在82.7% ～109.9%之间,相对标准偏差(RSD)在8.4% ～9.5%之间,检测限为0.008 8 mg/kg,定量限为0.029 mg/kg .该方法可以满足土壤中氯化苦残留测定的要求.
건립료일충쾌속측정토양중록화고잔류적방법.용석유미실온하침제토양30 min후선와진탕,리심후취상청액직접채용정공기상색보법측정.결과현시,재질량농도0.005 ～4 mg/L범위내,선성상관계수R~2=0.999.록화고적첨가수평재0.012 5 ～1.25 mg/kg범위내,5차중복적평균첨가회수솔재82.7% ～109.9%지간,상대표준편차(RSD)재8.4% ～9.5%지간,검측한위0.008 8 mg/kg,정량한위0.029 mg/kg .해방법가이만족토양중록화고잔류측정적요구.
An effective and rapid analytical method for determination of chioropicrin residues in soil was developed.Chloropicrin in soil was extracted with petroleum ether by shaking for 30 min.The supernatant was transferred into a clear headspace vial after centrifugation and determined by headspace gas chromatography with ECD.The correlation coefficient at the concentration range of 0.005- 4 mg/L was 0.999.The average recoveries were 82.7%-109.9% at fortified concentration range of 0.012 5-1.25 mg/kg,with relative standard deviations(RSD) of 8.4%-9.5%.The limit of detection(LOD) was 0.008 8 mg/kg,The limit of quantitation(LOQ) was 0.029 mg/kg.The results showed that this method can be applied to determine the residues of chloropicrin in soil.