| 比值导数光谱法同时测定调味品中的微量金属元素 |
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| 引用本文： | 倪永年,蔡英俊. 比值导数光谱法同时测定调味品中的微量金属元素[J]. 南昌大学学报(理科版), 2007, 31(1): 62-64 |
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| 作者姓名： | 倪永年 蔡英俊 |
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| 作者单位： | 南昌大学,化学系,江西,南昌,330031;南昌大学,食品科学教育部重点实验室,江西,南昌,330047;南昌大学,化学系,江西,南昌,330031 |
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| 基金项目： | 国家自然科学基金 , 江西省自然科学基金 , 长江学者创新团队计划 |
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| 摘 要： | 锌、铜、锰3种金属离子在pH=9.20的硼砂缓冲溶液中能和显色剂4-(2-吡啶偶氮)-间苯二酚(PAR)发生显色反应,但生成的有色络合物吸收光谱严重重叠,分析测定存在困难.本文采用比值导数光谱法对该3种金属元素进行同时测定,实验采集了300～800 nm间的的吸光度数据并建立比值导数光谱法模型,讨论了各试剂的用量、pH值的影响及可能存在的干扰,计算了回归方程和线性范围.该法被用于调味品酱油和红醋中锌、铜、锰的测定,计算结果与原子吸收法得到的结果较接近.
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| 关 键 词： | 比值导数光谱法 PAR 锌(Zn) 铜(Cu) 锰(Mn) |
| 文章编号： | 1006-0464（2007）01-0062-03 |
| 收稿时间： | 2005-11-04 |
| 修稿时间： | 2005-11-04 |
Simultaneous Determination of Zinc,Copper and Manganese in Chinese Condiment by the Ratio Spectrum-Derivative Spectrophotometry |
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| NI Yong-nian,CAI Ying-jun. Simultaneous Determination of Zinc,Copper and Manganese in Chinese Condiment by the Ratio Spectrum-Derivative Spectrophotometry[J]. Journal of Nanchang University(Natural Science), 2007, 31(1): 62-64 |
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| Authors: | NI Yong-nian CAI Ying-jun |
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| Affiliation: | a. Department of Chemistry, Nanchang University, Nanehang 330031 , China ; b. The Key Laboratory of Food Seicrce of Ministry of Education, Nanehang Universtity, Nanehang 330047, China |
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| Abstract: | The spectra of metal - PAR complexes are seriously overlapped in pH 9.20 buffer solution, and it is difficult to analysis them without a pre - separation. In this work,a ratio spectrum - derivative spectrophotometric method was developed for simultaneous determination of zinc, copper and manganese in commercial condiment samples. The optimal experimental condition and the possible interferences were investigated. |
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| Keywords: | ratio spectro - derivative spectrophotometry PAR zinc copper manganese |
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