| 粮油作物中微量铜测定的光度法研究 |
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| 引用本文： | 冯爱青,胡秋娈,张玉松.粮油作物中微量铜测定的光度法研究[J].洛阳师范学院学报,2007,26(5):78-80. |
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| 作者姓名： | 冯爱青 胡秋娈 张玉松 |
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| 作者单位： | 1. 洛阳师范学院生命科学系,河南洛阳,471022
2. 洛阳师范学院化学化工学院,河南洛阳,471022 |
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| 摘 要： | 在pH2.5～5.0条件下,Cu~(2+)与红色的氯磺酚S(CS)作用生成蓝色配合物,其最大吸收波长为650nm,比CS本身红移86nm。铜含量在0～20μg/10mL范围内符合Beer定律,表观摩尔吸光系数为6.87×10~4L·mol~(-1)·cm~(-1)。研究了CS与Cu~(2+)的光谱变化、反应条件、表面活性剂及共存物质的影响。十二烷基苯磺酸钠有增敏作用。方法操作简便,快速,灵敏度高,用于多种粮食,油料作物中铜(Ⅱ)含量的测定,结果满意。
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| 关 键 词： | 氯磺酚S 分光光度法 微量铜 |
| 文章编号： | 1009-4790（2007）05-0078-03 |
| 修稿时间： | 2007-03-06 |
Research on the Determination of Trace Copper in Crops by Using Sepctrophotometry Method |
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| FENG Ai-qing,HU Qiu-luan,ZHANG Yu-song.Research on the Determination of Trace Copper in Crops by Using Sepctrophotometry Method[J].Journal of Luoyang Teachers College,2007,26(5):78-80. |
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| Authors: | FENG Ai-qing HU Qiu-luan ZHANG Yu-song |
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| Institution: | 1. Department of Life Science, Luoyang Normal University, Luoyang 471022, China; 2. College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, China |
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| Abstract: | The organic dyes ChlorosulfophenolS(CS)-Spectrophotometry was applied to determine the micro- copper in crops.The change of spectrum and the reaction conditions of Cu(Ⅱ)with CS have been studied. The result showed that Cu(Ⅱ)reacts with CS and generates the blue complex in Britton-Robinson buffer me- dium at pH=2.5～5.0,which presents maximum absorption at 650nm with 86nm of red shift compared to CS itself.Beer's law is followed the rang of 0～20μg/10mL,and the apparent mole absorptivity is 2.0×10~4L·tool~(-1)·cm~(-1).The proposed method was used for the determination of copper crops. |
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| Keywords: | chlorosulfophenols spectrophotometry trace copper |
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