微波消解-电感耦合等离子体质谱法测定有机肥中镉、砷、汞、铅、铬含量
Determination of cadmium,arsenic,mercury,lead and chromium in organic fertilizer by microwave digestion combined with inductively coupled plasma mass spectrometry
官迪 1陈山 1田发祥 1纪雄辉 1龙世平 1吴家梅1
作者信息
- 1. 湖南省农业科学院/农业农村部长江中游平原农业环境重点实验室/农田土壤重金属污染防控与修复湖南省重点实验室,湖南 长沙 410125
- 折叠
摘要
采用电感耦合等离子体质谱法(ICP-MS)测定,比较湿法消解 30 min,湿法消解至近干和微波消解等不同前处理方法对有机肥料中镉、砷、汞、铅、铬元素的提取效果,建立了一种基于ICP-MS测定有机肥料多种重金属元素含量的方法.结果表明:湿法消解至近干和微波消解法对有机肥多元素成分分析标准物质(RMH-F001)中 5 项重金属含量的测试结果均满足标准要求,方法定量值、标准值偏差分别低于 6.3%、5.7%;硝酸/过氧化氢体系-微波消解处理下,样品结果稳定性最佳,相对标准偏差为 0.8%～6.8%,相对偏差为 1.1%～9.0%,相对相差为 2.2%～18.0%,加标回收率为 99.4%～102.9%.硝酸/过氧化氢体系-微波消解-ICP-MS法可作为有机肥中 5 项重金属统一化测定的常规方法.
Abstract
Inductively couple plasma mass spectrometry(ICP-MS)was used to compare the extraction effects of wet digestion for 30 min,wet digestion to near-dry and microwave digestion on cadmium,arsenic,mercury,lead and chromium from organic fertilizers,and a method for the determination of multiple heavy metal elements from organic fertilizers for the unified measurement by ICP-MS was established.The results indicated that after the wet digestion to near-dry digestion and microwave digestion,the method quantification and standard value deviation of five heavy metals content in standard material for multielement composition analysis of organic fertilizer(RMH-F001)from standard value were less than 6.3%and 5.7%,respectively,and the estimated values were in line with the standard value range.The stability of data under the treatment of microwave digestion with nitric acid-hydrogen peroxide system was the best,the relative standard deviation was 0.8%-6.8%,the relative deviation was 1.1%-9.0%,relative difference values was 2.2%-18.0%and the standard addition recoveries was 99.4%-102.9%.The microwave digestion combined with ICP-MS could be used as a conventional method for the unified measurement of five heavy metals in organic manure.
关键词
湿法消解/微波消解/重金属/有机肥/统一化测定Key words
wet digestion/microwave digestion/heavy metal/organic fertilizer/unified detection引用本文复制引用
基金项目
国家重点研发计划(2022YFD1700105)
湖南省重点研发计划(2021NK2029)
湖南省农业科技创新资金项目(2017QN33)
出版年
2024
NETL
NSTL
万方数据