| 高灵敏度分光光度法测定茶叶中锌的含量 |
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| 引用本文： | 陈慧敏,应如梦,王帅,林丝丝,张春牛.高灵敏度分光光度法测定茶叶中锌的含量[J].广东微量元素科学,2011,18(6):37-40. |
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| 作者姓名： | 陈慧敏 应如梦 王帅 林丝丝 张春牛 |
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| 作者单位： | 丽水学院化学系,浙江,丽水,323000 |
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| 基金项目： | 浙江省新苗人才计划基金 |
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| 摘 要： | 研究了在聚乙烯醇(PVA)存在下,Zn2+ - SCN—- RhB高灵敏度显色反应体系,采用分光光度法测定茶叶中微量锌的新方法.结果表明,络合物的最大吸收峰在605 nm处,摩尔吸光系数为1.59×106 L·mol—1·cm—1,Zn2+的质量浓度在0.0~0.04 μg/mL范围内服从比尔定律.该法用于测定茶叶中锌...
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| 关 键 词： | 分光光度法 锌 罗丹明B 茶叶 |
Determination of Zinc in Tea Through Highly SensitiveSpectrophotometric System |
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| CHEN Huimin,YING Rumeng,WANG Shuai,LIN Sisi,ZHANG Chunniu.Determination of Zinc in Tea Through Highly SensitiveSpectrophotometric System[J].Trace Elements Science,2011,18(6):37-40. |
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| Authors: | CHEN Huimin YING Rumeng WANG Shuai LIN Sisi ZHANG Chunniu |
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| Institution: | CHEN Huimin,YING Rumeng,WANG Shuai,LIN Sisi,ZHANG Chunniu(Department of Chemistry,Lishui College,Zhejiang Lishui 323000,China) |
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| Abstract: | A new spectrophotometric method for the determination of zinc in tea by using Zn2+-SCN——RhB-PVA highly sensitive chromogenic reaction system was studied.The results show that the strongest absorption peak of ion complex is at 605 nm and the molar absorption coefficient is 1.59×106L mol-1 cm-1.When the zinc concentration is in the range of 0.0~0.04 μg/mL,which accords with lambert beer’s law.Favorable results can be achieved with this method. |
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| Keywords: | spectrophotometry zinc rhodamine B tea |
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