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| Determination of Phosphorus in Steel by Multicomponent Spectral Fitting-Inductively Coupled Plasma Atomic Emission Spectrometry |
| Received:September 12, 2012 Revised:November 28, 2012 |
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| DOI：doi:10.3969/j.issn.2095-1035.2013.01.013 |
| KeyWord:multi-component spectral fitting; inductively coupled plasma atomic emission spectrometry;steel;phosphorus |
| Author | Institution |
| YI Kehui |
中南大学 化学化工学院，湖南 长沙 |
| DENG Feiyue |
中南大学 化学化工学院，湖南 长沙 |
| WANG Li |
中南大学 化学化工学院，湖南 长沙 |
| ZHU Jie |
中南大学 化学化工学院，湖南 长沙 |
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| Abstract: |
| The method for determination of phosphorus in steel by multi-component spectral fitting(MSF)-inductively coupled plasma atomic emission spectrometry (ICP-AES) was introduced. In this paper, the MSF method was used to correct spectral interference and the spectral line with the wavelength of 213.617 nm was selected as the analysis line for phosphorus. Samples were dissolved in nitric acid (1+5) and concentrated hydrochloric acid, and then without any separation were determined by ICP. The influence of instrument working parameters on the results were discussed. The optimal instrumental conditions were determined as following：13 mm of observation height, 0.7 L/min of nebulizer gas flow rate and 1 300 W of RF power. The method has a wide linear rang of 0.05～100 mg/L with the linear correlation coefficient of 0.999 8. The detection limit(3σ) was 0.0411 mg/L with relative standard deviations of 1.8% and the recovery was in the range of 96.1%～100.8%.The method is accurate and simple with satisfactory precision and accuracy, and is suitable for the determination of phosphorus in steel. |
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