摘要
利用吹扫捕集气相色谱-原子荧光光度法测定土壤中烷基汞含量。分别用酸法消解和碱法消解处理土壤样品,对比了两种样品处理方法的效果,结果表明碱法消解优于酸法消解,该法具有步骤少,耗时短,使用的试剂种类少、毒性小,土壤中烷基汞回收率高等优点。甲基汞、乙基汞的质量在0.5~1000 pg范围内与色谱峰面积线性关系良好,相关系数分别为0.9999和0.9998,当称样质量为0.5 g时,甲基汞的检出限为0.35μg/kg,乙基汞的检出限为0.53μg/kg。土壤样品加标回收率为70.0%~114.0%,测定结果的相对标准偏差为3.5%~12.0%(n=5)。
The content of alkyl mercury in soil was determined by alkali digestion-chemical derivatization-atomic fluorescence spectrometry.The soil sample was respectively treated with acid method and alkali method,and the differences of the two pretreatment methods was compared,which showed that the alkali digestion was better than the acid digestion in the experimental results,with less steps,short time-consuming,less types of reagents,low toxicity and hight recovery of alkyl mercury in soil.The mass of methyl mercury and ethyl mercury had a good linear relationship with the chromatographic peak area in the range of 0.5-1000 pg,and the correlation coefficients were 0.9999 and 0.9998 respectively.When the sample weight was 0.5 g,the detection limit of methyl mercury was 0.35μg/kg,and the detection limit of ethyl mercury was 0.53μg/kg.The recoveries rate of soil samples were 70.0%-114.0%,and the relative standard deviations of determination results were 3.5%-12.0%(n=5).
作者
岳中慧
赵方舟
刘剑
易文杰
YUE Zhonghui;ZHAO Fangzhou;LIU Jian;YI Wenjie(Changsha Uranium Geology Research Institute,Changsha 410007,China;Hunan Provincial Department of Ecology and Environment,Changsha 410014,China)
出处
《化学分析计量》
CAS
2023年第2期57-61,共5页
Chemical Analysis And Meterage
关键词
碱法消解
化学衍生
原子荧光光度法
土壤
烷基汞
alkaline digestion
chemical derivatization
atomic fluorescence spectrometry
soil
alkyl mercury
作者简介
通信作者:赵方舟,本科,工程师,从事有机化学分析检测工作。
