火焰原子吸收法测定钠元素分析条件的优化
目的探讨火焰原子吸收光谱法测定钠元素的最佳工作条件。方法对仪器元素灯的灯电流、狭缝宽度、压缩空气流量、燃气/助燃气比等参数进行正交试验优化,确定最佳的测定条件。结果最佳工作条件为：元素灯电流4.0 mA;压缩空气流量140 kPa;燃气/助燃气比1：7;狭缝0.4 nm;钠元素在1.0~5.0 mg/L范围内线性关系良好（r=0.9996）,具有良好精密度（RSD=0.54%）,在浓度1.0、3.0和6.0 mg/L添加水平下,钠加标回收率分别为98.09%、101.63%和99.49%。结论经优化分析解决了高浓度标准曲线向下弯曲的问题,扩宽了线性范围,提高了检测结果准确性,能满足食品中钠元素...
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| Published in | 食品安全质量检测学报 Vol. 8; no. 5; pp. 1872 - 1877 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
汤臣倍健股份有限公司,珠海,519040
2017
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| Subjects | |
| Online Access | Get full text |
| ISSN | 2095-0381 |
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| Summary: | 目的探讨火焰原子吸收光谱法测定钠元素的最佳工作条件。方法对仪器元素灯的灯电流、狭缝宽度、压缩空气流量、燃气/助燃气比等参数进行正交试验优化,确定最佳的测定条件。结果最佳工作条件为：元素灯电流4.0 mA;压缩空气流量140 kPa;燃气/助燃气比1：7;狭缝0.4 nm;钠元素在1.0~5.0 mg/L范围内线性关系良好（r=0.9996）,具有良好精密度（RSD=0.54%）,在浓度1.0、3.0和6.0 mg/L添加水平下,钠加标回收率分别为98.09%、101.63%和99.49%。结论经优化分析解决了高浓度标准曲线向下弯曲的问题,扩宽了线性范围,提高了检测结果准确性,能满足食品中钠元素的实际检测需要。 |
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| Bibliography: | 11-5956/TS OUYANG Chao, CHEN Jun-Hong, ZHU Zhi-Hui, LIU Yu-Feng, LI Mu-Qi （By-Health Coco., ltdLtd, Zhuhai 519040, China） flame atomic absorption spectrometry;sodium;orthogonal test;optimization Objective To explore the optimum working conditions for the determination of sodium element by flame atomic absorption spectrometry.Methods The orthogonal test was conducted using instrument lamp,slit width,compressed air flow,and fuel gas/oxidant gas ratio as considering parameters,to determine the best measurement conditions.Results The optimum working conditions were as follows：element lamp current was 4.0 mA,compressed air flow was 140 kPa,fuel gas/oxidant gas ratio was 1∶7,slit width was 0.4 nm.Under the optimum working solution,sodium element had a good linear relationship in the range of 1.0～5.0 mg/L（r=0.9996） with good precision （RSD=0.54%）.The recoveries of sodium element spiked at 1.0,3.0 and 6.00 mg/L were 98.09%,101.63% and 99.49%,respectively.Conclusion The analysis and optimization solve the problem of high |
| ISSN: | 2095-0381 |