首页|基于不同前处理方式ICP-MS法测定土壤中22种金属元素

基于不同前处理方式ICP-MS法测定土壤中22种金属元素

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建立了以四酸(HNO3-HCl-HF-HClO4)消解体系,微波消解和电热板消解两种前处理方式的 ICP-MS 测定土壤中 Ag、As、Ba、Be、Bi、Cd、Co、Cr、Cu、Li、Mn、Mo、Ni、Pb、Sb、Sn、Sr、Th、Tl、U、V和Zn等22种金属元素含量的方法.两种前处理方式22种金属元素方法检出限范围分别为0.01~3.0 mg/kg和0.01~2.0 mg/kg,测定下限范围分别为0.04~12.0 mg/kg和0.04~8.0 mg/kg;校准曲线在0~500 μg/L浓度范围内,线性相关系数(r)范围为0.9992~0.9999,校准曲线中间点浓度测定偏差范围为-6.3%~9.1%;不同土壤类型样品平行测定的实验室内相对标准偏差(RSD)范围分别为0.3%~19.9%和0.3%~18.4%;不同浓度梯度标准物质测定的实验室内相对误差(RE)范围分别为-18.5%~15.8%和-20.6%~11.9%.方法特性指标满足相关质量保证和质量控制要求,能够实现快速定性、准确定量检测土壤中22种金属元素,为批量分析测试土壤中多种金属元素提供了方法技术支撑,具有广阔的应用前景.
Determination of 22 Metals in Soil by ICP-MS Based on Different Pretreatment Methods
With the use of tetraacid digestion system(HNO3-HCl-HF-HClO4),microwave digestion and electrothermal plate heating were applied for the digestion of various real soil samples,followed by inductively coupled plasma mass spectrometry(ICP-MS)detection.The proposed method was used for the determination of Ag,As,Ba,Be,Bi,Cd,Co,Cr,Cu,Li,Mn,Mo,Ni,Pb,Sb,Sn,Sr,Th,Tl,U,V and Zn in soil under the optimized sample mass,reagent dosage,digestion temperature/time,and instrumental operation conditions.The detection limits of 22 target elements obtained by ICP-MS with the use of microwave digestion and electrothermal plate heating were 0.01-3.0 mg/kg and 0.01-2.0 mg/kg,with the limit of quantification of 0.04-12.0 mg/kg and 0.04-8.0 mg/kg,respectively.The linear correlation coefficient(r)of the calibration curve ranges from 0.9992 to 0.9999 and the calibration curve intermediate point concentration measurement deviation ranges from-6.3%to 9.1%in the concentration range of 0-500 μg/L.The relative standard deviation ranges were 0.3%-19.9%and 0.3%-18.4%respectively.The relative error ranges were-18.5%-15.8%and-20.6%-11.9%in different contents gradient reference materials soils,respectively.The method characteristic index can meet the quality assurance and quality control requirements.The ICP-MS detection can achieve rapid qualitative and accurate quantitative detection of 22 metals in soil,which can provide technical support and has broad application prospects for batch analysis of multiple metals.

SoilHeavy metalsElectrothermal plate digestionMicrowave digestionInductively coupled plasma mass spectrometry

范俊楠、张钰、李国坡、郭丽、魏巍

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湖北省生态环境监测中心站,湖北武汉 430072

山南市生态环境局,西藏山南 856100

湖北省计量测试技术研究院,湖北武汉 430223

土壤 重金属 电热板消解 微波消解 电感耦合等离子体质谱

生态环境部环境监测司环境监测管理与信息发布专项生态环境部污染物计量和标准样品研究重点实验室开放课题

2024

分析科学学报
武汉大学,北京大学,南京大学

分析科学学报

CSTPCD北大核心
影响因子:0.717
ISSN:1006-6144
年,卷(期):2024.40(4)