Optimized Method for the Determination of Arsenic in Drinking Water by Graphite Furnace Atomic Absorption Spectrometry
Received:December 18, 2018  Revised:May 13, 2019
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DOI:doi:10.3969/j.issn.2095-1035.2019.03.004
KeyWord:Graphite Furnace Atomic Absorption Spectrometry (GFAAS); Drinking Water; Arsenic;
  
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ZHOU shan 宁德市疾病预防控制中心
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Abstract:
      A method for the determination of arsenic in drinking water by graphite furnace atomic absorption spectrometry (GFAAS) was established. The use of high boost discharge hollow cathode lamp reduces the baseline noise level and detection limit. Temperature program, chemical matrix modifier and heat stabilizer were optimized and applied to the determination of arsenic by GFAAS without preliminary treatment. The results showed that the linear equation was y=0.00562x+0.00004, with R 0.9983. LOD was 0.26 ug/L when the sample volume is 16 ug/L. The applicability of the method was verified by the actual drinking water samples. The recoveries ranged from 98.1% to 99.2%, and RSD was less than 5%.
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