| 光谱学与光谱分析 |
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| Determination of Trace Germanium in Coal by Spectrophotometry with 2,4-Dichlorophenylfluorone |
| SAI Yin, LI Sheng, HAN Fu-bin |
| College of Chemistry and Chemical Engineering，Inner Mongolia University, Hohhot 010021, China |
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Abstract A method for the determination of germanium in coal samples by spectrophotometry has been developed. The color reaction of germanium with 2,4-dichlorophenylfluorone(2,4-DClPF) in the presence of cetyltrimethylammonium bromide(CTMAB) has been studied. The results show that Ge(Ⅳ) reacts on 2,4-DClPF and CTMAB to form a multicomponent complex in a 1.8-2.5 mol·L-1 H2SO4 medium. The complex has the maximum absorption wavelength at 516 nm and its apparent molar absorptivity ε is 1.38×105 L·mol-1·cm-1. Beer’s law is obeyed in the range of 0-12.5 μg·(25 mL)-1 for Ge(Ⅳ). The recovery of standard addition is 103%-106% and the relative standard deviation(RSD) is 1.1%-1.7%. This method has been applied to the determination of Ge(Ⅳ) in coal samples with satisfactory results.
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Received: 2003-09-16
Accepted: 2003-12-29
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Corresponding Authors:
SAI Yin
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| Cite this article: |
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SAI Yin,LI Sheng,HAN Fu-bin. Determination of Trace Germanium in Coal by Spectrophotometry with 2,4-Dichlorophenylfluorone[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(11): 1404-1406.
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http://www.gpxygpfx.com/EN/Y2004/V24/I11/1404 |
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