Solid Phase Extraction and Spectrophotometric Determination of Au(III) with 5-(2-Hydroxy-5-nitrophenylazo)thiorhodanine
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- HU Qiufen
- Department of Chemistry, Yunnan University Department of Chemistry, Yuxi Teacher's College
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- CHEN Xiubin
- Department of Chemistry, Yunnan University
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- YANG Xiangjun
- Department of Chemistry, Yunnan University
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- HUANG Zhangjie
- Department of Chemistry, Yunnan University
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- CHEN Jing
- Department of Chemistry, Yunnan University
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- YANG Guangyu
- Department of Chemistry, Yunnan University
Bibliographic Information
- Other Title
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- Solid Phase Extraction and Spectrophotometric Determination of Au 3 with 5 2 Hydroxy 5 nitrophenylazo thiorhodanine
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Abstract
A new chromogenic reagent, 5-(2-hydroxy-5-nitrophenylazo)thiorhodanine (HNATR) was synthesized. A highly sensitive, selective and rapid method for the determination µg l-1 level of Au(III) based on the rapid reaction of Au(III) with HNATR and the solid phase extraction of the colored complex with a reversed phase polymer-based C18 cartridge have been developed. The HNATR reacted with Au(III) to form a red complex of a molar ratio 1:2 (Au(III) to HNATR) in the presence of 0.05 - 0.5 mol l-1 of phosphoric acid solution and emulsifier-OP medium. This complex was enriched by the solid phase extraction with a polymer-based C18 cartridge. The enrichment factor of 100 was achieved. The molar absorptivity of the complex is 1.37 × 105 l mol-1 cm-1 at 520 nm in the measured solution. The system obeys Beer's law in the range of 0.01 - 3 µg ml-1. The relative standard deviation for eleven replicates sample of 0.5 µg l-1 level is 2.18%. The detection limit, based on the three times of standard deviation is 0.02 µg l-1 in the original sample. This method was applied to the determination of gold in water and ore with good results.
Journal
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- Analytical Sciences
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Analytical Sciences 22 (4), 627-630, 2006
The Japan Society for Analytical Chemistry
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Details 詳細情報について
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- CRID
- 1390001204255481984
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- NII Article ID
- 10018124151
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- NII Book ID
- AA10500785
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- ISSN
- 13482246
- 09106340
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- NDL BIB ID
- 7872133
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed