微波消解-电感耦合等离子体质谱(ICP-MS)法同时测定城市污泥中7种重金属元素

Simultaneous determination of seven heavy metal elements in municipal sludge by Microwave Digestion-Inductively Coupled Plasma Mass Spectrometry(ICP-MS)

采用微波消解-电感耦合等离子体质谱法同时测定城市污泥中铍、钴、钼、镉、铅、锑、铊7种重金属元素。7种重金属元素在一定的质量浓度范围内与其信号强度呈线性关系,方法的检出限在0.01～0.10μg/L。用加标回收测定其回收率,加标回收率范围在90.0%～104%,对标准样品平行测定6次,测定值的相对标准偏差在0.94%～4.15%。以镇江市A、B、C三个污水处理厂的压滤出厂污泥为实验材料,对镇江城市污泥进行重金属监测,监测结果符合标准要求。

In this paper,microwave digestion-inductively coupled plasma mass spectrometry (ICP-MS) was used for simultaneous determination of 7 kinds of heavy metal elements of Co,Mo,Be,Sb,Tl,Cd and Pb in municipal sludge.These seven heavy metal elements showed a linear relationship of concentration and signal intensity for a certain concentration range.The detection limit was between 0.01 - 0.10μg/L and recovery rate ranged between 90.0%- 104%.The relative standard deviation of six measurements was 0.94%- 4.15%.The method was used for heavy metal monitoring in municipal sludge of Zhenjiang sewage treatment plants(A,B,C)and monitoring results were in accordance with relevant standards.