首页 | 本学科首页   官方微博 | 高级检索  
     检索      

比值导数光谱法同时测定调味品中的微量金属元素
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.
作者姓名:倪永年  蔡英俊
作者单位:1. 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
2. 南昌大学,化学系,江西,南昌,330031
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
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.

关 键 词:比值导数光谱法  PAR  锌(Zn)  铜(Cu)  锰(Mn)  比值导数光谱法  同时测定  调味品  微量金属元素  Zinc  Determination  Spectrophotometry  Ratio  Chinese  Manganese  原子吸收法  结果  锰的测定  酱油  线性范围  回归方程  计算  干扰  影响  用量
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
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.
Authors:NI Yong-nian  CAI Ying-jun
Institution: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
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.
Keywords:ratio spectro - derivative spectrophotometry  PAR  zinc  copper  manganese
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号