| 光谱学与光谱分析 |
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| Simultaneous Determination of Calcium and Magnesium in Urines by Flame Atomic Absorption Spectrometry |
| BAI Yu，OUYANG Jian-ming*，BAI Yan，CHEN Mei-luan |
| Institute of Biomineralization and Lithiasis Research, Ji′nan University, Guangzhou 510632，China |
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Abstract The contents of calcium and magnesium in urines were simultaneously determined by flame atomic absorption spectrometry. The optimized working conditions were ascertained. For the determination of calcium, the used wavelength was 422.8 nm, and the current of HCL(Hollow Cathode Lamp) was 3 mA; for the determination of magnesium, the used wavelength was 285.2 nm, and the current of HCL(Hollow Cathode Lamp) was 4 mA. The height of burner and the air-acetylene ratio were 8 mm and 6∶1, respectively, for the determination of both calcium and magnesium. In order to remove the disturbance of phosphate，sulphate and silicate on the determination of calcium, a releasing reagent can be used. Lanthanum chloride (LaCl3) was tested as a better releasing reagent than strontium chloride (SrCl2). The disturbance of urinary substrate coｕld be avoided after the urines were diluted to 1∶100 with distilled water. The concentrations of Ca and Mg in 15 urines were determined under the optimized conditions. The obtained results were consistent with the archived data. The recovery was 96%-104%, the relative standard deviation for a sample was 1.8% with P＜0.05.
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Received: 2003-03-16
Accepted: 2003-08-06
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Corresponding Authors:
OUYANG Jian-ming
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| Cite this article: |
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BAI Yu,OUYANG Jian-ming,BAI Yan, et al. Simultaneous Determination of Calcium and Magnesium in Urines by Flame Atomic Absorption Spectrometry [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(08): 1016-1019.
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| URL: |
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http://www.gpxygpfx.com/EN/Y2004/V24/I08/1016 |
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