| 光谱学与光谱分析 |
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| Simultaneous Determination of Copper(Ⅱ) and Chromium(Ⅲ) by Absorbance Ratio-Derivative Method |
| ZHANG Shu-fang |
| Department of Chemistry, Qufu Normal University, Qufu 273165，China |
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Abstract In the present paper, an absorbance ratio-derivative method for the simultaneous determination of copper(Ⅱ) and chromium(Ⅲ) was proposed. In the HAc-NaAc buffer solution at pH 5.7 with heating, Cr3+ or Cu2+ with CAS and CTMAB formed a blue ternary complex. The molar absorptivities of Cr(Ⅲ)-CAS-CTMAB and Cu(Ⅱ)-CAS-CTMAB were 2.52×105 L·mol-1·cm-1 and 1.01×105 L·mol-1·cm-1 respectively. Beer’s law was obeyed in the range of 0.08-1.2 μg·mL-1 for Cu(Ⅱ) and 0.05-0.52 μg·mL-1 for Cr(Ⅲ). The detection limits of Cu(Ⅱ) and Cr(Ⅲ) are 0.014 μg·mL-1and 0.013 μg·mL-1 respectively. This method was applied to the determination of Cu(Ⅱ) and Cr(Ⅲ) in surrounding water with satisfactory results.
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Received: 2004-10-08
Accepted: 2005-01-16
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Corresponding Authors:
ZHANG Shu-fang
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| Cite this article: |
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ZHANG Shu-fang. Simultaneous Determination of Copper(Ⅱ) and Chromium(Ⅲ) by Absorbance Ratio-Derivative Method[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(03): 535-538.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2006/V26/I03/535 |
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