恒温振荡提取-电感耦合等离子体质谱法测定土壤中有效态铅  

Determination of available lead in soil by isothermal oscillation extraction inductively coupled plasma mass spectrometry

作　　者：田戈 郭颖超 刘卫 谷周雷 何煦 TIAN Ge;GUO Yingchao;LIU Wei;GU Zhoulei;HE Xu(Geological Brigade of North China Geological Survey Bureau,Chengde 067000,China)

机构地区：[1]华北地质勘查局514地质大队,河北承德067000

出　　处：《农业环境科学学报》2023年第5期1181-1186,共6页Journal of Agro-Environment Science

基　　金：河北省重点研发计划项目(21327504D);天津华北地质勘查局科研项目(HK2022-B14);华北地质勘查局514地质大队科研项目(HKWYS2022-C1)。

摘　　要：为精准、快速检测土壤中有效态铅含量,以土壤有效态标准物质为研究对象,采用智能精密型摇床作为前处理设备,结合电感耦合等离子体质谱仪(ICP-MS)进行测试,从提取温度、振荡时间、振荡频率、浸提剂用量等方面进行条件考察,确定了最优实验条件为振荡时间2 h、提取温度(25±2)℃、振荡频率(180±10)r·min^(-1)、浸提剂用量25 mL。本方法检出限达到0.009 mg·kg^(-1),土壤有效态标准物质相对标准偏差为2.1%~3.3%,精密度好、准确度高、检出限低。采用本方法和国家标准方法对不同地区实采样品进行比对测试,相对偏差均小于5%,结果准确可靠。恒温振荡提取-电感耦合等离子体质谱法前处理操作简单、可控性强,处理效率高,分析结果准确可靠,具有较好的应用前景。To accurately and quickly detect the effective lead content in soil,available soil standard substances were taken as the research objects,with the intelligent precision shaking table used as the pretreatment equipment.Furthermore,the inductively coupled plasma mass spectrometer(ICP-MS)was used for testing.The conditions were investigated with respect to the extraction temperature,oscillation time,oscillation frequency,and amount of extractant.The optimal experimental conditions were also determined.The experimental results showed that the detection limit of the proposed method was 0.009 mg·kg^(-1),and the relative standard deviation(RSD)of soil available standard substances was 2.1%–3.3%.These results implied that the method had good precision,high accuracy,and a low detection limit.The proposed method and the national standard method were used to compare samples collected throughout different regions,and the relative deviation was shown to be less than 5%,thereby verifying the accuracy and reliability of the obtained results.The pretreatment of isothermal oscillating extraction ICP-MS is simple,controllable,efficient,accurate,and reliable.Therefore,it is considered suitable for batch production and has promising application potential.

关 键 词：土壤 有效态铅 振荡 电感耦合等离子体质谱仪(ICP-MS) 

分 类 号：O657.63[理学—分析化学] X833[理学—化学]