摘要
采用微波消解-石墨炉原子吸收分光光度法测定北方某市环境空气PM10及PM25样品中的镉,并比较了硝酸-盐酸体系与硝酸-过氧化氢体系的消解效果.结果表明,硝酸-盐酸体系与硝酸-过氧化氢体系的方法检出限分别为0.006、0.008 μg/L,相对偏差分别为5.4％、7.9％,加标回收率为85％ - 110％,其检出限、精密度与加标回收率均满足要求.2种消解体系均能较好地提取颗粒物中的镉,测定结果无显著差异（P＜0.05）,但硝酸-过氧化氢体系更适合作为多种分析仪器测试通用的前处理体系.
The method of microwave digestion-graphite furnace atomic absorption spectrophotometry was used to determine thecontent of Cd in ambient particulate matter （PM10 and PMzs） in the northern city of China. The digestion effect of HNO3-HC1and HNO3-H202 was contrasted also. The results showed that the detection limits of HNO3-HCI and HNO3-H202 were 0. 006μg/L and 0. 008 μg/L, the RSD were 5.4% and 7.9% , respectively. The recovery range as 85% -110%. The detection limit,precision and recovery range could satisfy the requirements. These acid digestion system could decompose the samples effectivelywithout significant difference （P 〈 0. 05 ） and the acid digestion system of HNO3-H202 was more suitable for many kinds ofinstrumental analysis.
出处
《中国环境监测》
CAS
CSCD
北大核心
2015年第1期90-93,共4页
Environmental Monitoring in China
关键词
大气颗粒物
石墨炉原子分光光度吸收法
酸体系
微波消解
重金属
镉
ambient particulate matter
graphite furnace atomic absorption spectrophotometry
acid system
microwave digestion
heavy metal
Cd
