ICP-MS法测定绿色建材-砌体材料中可浸出重金属元素砷

Determination of Dissolvable Heavy Metals Arsenic in Green BuildingMaterials - Masonry Materials by ICP-MS

本文建立了一种利用电感耦合等离子体质谱(ICP-MS)来测定绿色建材-砌体材料中可浸出重金属砷含量的方法。本方法以硫酸硝酸法为浸提剂,对砌体材料进行浸提,所得浸提液经微波消解后,通过ICP-MS进行分析可浸出重金属砷元素的含量。经过大量实验进行了方法学验证。该方法检出限为0.047µg/L,加标回收率在98.4%~107.2%之间,精密度均小于2%。说明该方法稳定性好、精密度高,检出限低,并可进一步实现多种可浸出重金属元素同时测定。

In this paper,an inductively coupled plasma mass spectrometry(ICP-MS)was founded to detect the content of leachable heavy metal arsenic in green building-masonry materials.In this method,sulfuric acid and nitric acid were used as leaching agent to extract masonry materials.After microwave digestion,the content of leachable heavy metal arsenic was analyzed by ICP-MS.A large number of experiments were carried out to verify the methodology.The detection limit was 0.047μg/L,the recoveries ranged from 98.4%-107.2%,and the precision was less than 2%.The results show that the method has good stability,high precision and low detection limit,and it can be used to determine many heavy metals simultaneously.