云南化工2026，Vol.53Issue(6)：56-59,4.DOI:10.3969/j.issn.1004-275X.2026.06.12
微波消解-电感耦合等离子体质谱法测定水系沉积物中的钍
Determination of Thorium in Aquatic Sediments by Microwave Digestion-Inductively Coupled Plasma Mass Spectrometry
奚邦菊1
作者信息
- 1. 上海市岩土工程检测中心有限公司,上海 200436
- 折叠
摘要
Abstract
A microwave digestion system was employed for sample preparation,and inductively coupled plasma mass spectrometry(ICP-MS)was used to determine thorium content in aquatic sediments.Through optimization of the pretreatment method,instrument parameters,and inter-ference correction strategies,a highly sensitive and accurate ICP-MS determination method was established.Experimental results indicated that-the linear calibration curve has a mass the concentration range of 0-100 μg/L with a correlation coefficient r of 0.9999.The method detection limit was determined to be 0.001 mg/kg,with a lower limit of quantification of 0.004 mg/kg.The relative standard deviation(RSD)for parallel samples ranged from 1.7%to 4.4%(n=6),while the relative error for certified reference materials ranged from-0.2%to1.3%.Spiked sample recovery rates were85.1%～93.9%.Application of this method to actual river sediment samples indicates that thorium in sediments from this region primarily originates from natural geological backgrounds,with no significant anthropogenic contamination detected.关键词
钍/微波消解/电感耦合等离子体质谱法/沉积物Key words
Thorium/Microwave Digestion/Inductively Coupled Plasma Mass Spectrometry/Sediment分类
化学化工引用本文复制引用
奚邦菊..微波消解-电感耦合等离子体质谱法测定水系沉积物中的钍[J].云南化工,2026,53(6):56-59,4.
