文档介绍：直接汞分析仪快速
DMA-80
测定环境样品中总汞量
刘海玲刘雪陈皓袁园
, , ,
(同济大学污染控制与资源化研究国家重点实验室,上海 200092)
摘要应用直接汞分析仪快速测定了土壤大米人发垃圾污水等类样品中汞
: DMA-80 、、、、 8
的含量按样品性质取适量样品置于镍质样品舟或石英样品舟内在约
。, 150℃~300 ℃( 30~
将样品烘干后在温度下分解并氧化约所生成的氧化汞进入
300s) , 800℃~950℃( 180~420s)。
催化炉催化还原为汞蒸气,再经过汞齐化器使汞蒸气被选择性捕集并汞齐化,加热使汞解吸,由载
处进行原子吸收光谱法检测。用标准曲线法定量,按所选择的测
定条件测定了种标准样品土壤标准样品和水系沉积物标准样品中的汞含量测
2 (GSS-3 GSD-9 ) ,
定值与认定值相符,测定值的相对标准偏差(n=5)%,%。用此仪器测定了污泥、土
壤、垃圾浸出液,生活污水和河水等样品中的汞含量,测定值与常规原子荧光光谱法的测定值一致。
关键词:直接汞分析仪;汞;高温分解氧化;汞齐化富集;原子吸收光谱法;环境样品
中图分类号文献标志码文章编号
: :A :1001-4020(2013)11-1360-04
Rapid Determination of Total Mercury in Enviromental Samples
by the DMA-80Direct Mercury Analyzer
LIU Hai-ling,LIU Xue,CHEN Hao,YUAN Yuan
(State Key Research on Pollution Control and Resource Utilization,Tongji University,Shanghai 200092,China)
Abstract:DMA-80direct mercury analyzer was applied to rapid determination of total mercury in 8kinds of
samples,including soil,rice,human hair,gabbage,waste water and appropriate amount of solid or liquid
sample was placed in the nickel or quartz sample boat,dried at 150℃-300℃for 30-300s,selected according to
different properties of the sample;mercury in the sample was oxidized to HgO at 800℃-950℃for 180to 420s.
The HgO was reduced to Hg0 vapor in the catalytic reductor,and the Hg0 vapor was amalgamated and trapped