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| Determination of Arsenic in Mill Scale Solid Waste by Atomic Fluorescence Spectrometry |
| Received:November 08, 2012 Revised:December 25, 2012 |
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| DOI：doi:10.3969/j.issn.2095-1035.2013.02.006 |
| KeyWord:solid waste; mill scale; arsenic; determination |
| Author | Institution |
| ZHANG Qingjian |
山东出入境检验检疫局，山东 青岛 |
| DING Shibing |
山东出入境检验检疫局，山东 青岛 |
| GUO Bing |
山东出入境检验检疫局，山东 青岛 |
| DU Hengqing |
山东出入境检验检疫局，山东 青岛 |
| MIN Guohua |
山东出入境检验检疫局，山东 青岛 |
| FENG Lili |
山东出入境检验检疫局，山东 青岛 |
| LIU Zhi |
山东出入境检验检疫局，山东 青岛 |
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| Abstract: |
| A new analytical method for the determination of arsenic in a mill scale solid waste is established. Mill scale powder materials were dissolved by hydrochloric acid. Thiourea and ascorbic acid were added to the solution to reduce arsenate. Arsenic reacts with sodium borohydride and hydrochloric acid to generate arsine using 2% hydrochloric acid as carrier and the mixed solution containing 10 g/L sodium borohydride and 5 g/L potassium hydroxide as reducing agent. Arsine was introduced by argon gas stream into a quartz furnace atomizer to be atomized. The intensity of arsenic fluorescence excited by the hollow cathode lamps was measured. The relative standard deviation of arsenic is not more than 4.8%. The detection limit is 0.12 μg/L. And the recovery rate is between 97% and 103%. And the accuracy is better. The method has the advantages of less reagent consumption, rapidity and lower detection limit. |
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