| 光谱学与光谱分析 |
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| Study on Spectrophotometric Determination of Silver(Ⅰ) with 2-(2-Quinolinylazo)-1, 5-Dihydroxidebenzene |
| TAI Xi1, HU Qiu-fen1, YANG Guang-yu2, YIN Jia-yuan2 |
1. Department of Chemistry, Yuxi Normal College, Yuxi 653100, China
2. Department of Chemistry, Yunnan University, Kunming 650091, China |
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Abstract The color reaction of silver(Ⅰ) with 2-(2-quinolinylazo)-1, 5-dihydroxidebenzene (QADHB) and the solid phase extraction of the colored chelate with Waters Sep-Park C18 cartridge were developed. In the presence of pH=5.0 sodium citrate-sodium hydroxide buffer solution and sodium dodecyl sulfonate (SDS) medium, QADHB can reacts with silver to form a chelate of a molar ratio 1∶2 (silver to QADHB). This chelate can be enriched by the solid phase extraction with Waters Sep-Park C18 cartridge. The retained chelate can be eluted from cartridge with ethanol. In ethanol medium, The molar absorptivity is 6.99×104 L·mol-1·cm-1 at 550 nm. Beer′s law is obeyed in the range of 0-1.2 μg·mL-1. This method can be applied to the determination of silver in water with satisfactory results.
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Received: 2002-06-26
Accepted: 2002-10-08
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Corresponding Authors:
TAI Xi
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| Cite this article: |
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TAI Xi,HU Qiu-fen,YANG Guang-yu, et al. Study on Spectrophotometric Determination of Silver(Ⅰ) with 2-(2-Quinolinylazo)-1, 5-Dihydroxidebenzene [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(01): 125-127.
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http://www.gpxygpfx.com/EN/Y2004/V24/I01/125 |
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