标准加入直读法快速测定南阳彩色小麦中的铜  

Rapid Determination of Copper in Nanyang Color Wheat by Direct-Reading Concentration after Adding to Reference Material

作　　者：宫安晶[1] 乔明武[1] 高向阳[1] 王慧荣[1] 

机构地区：[1]河南农业大学食品科学技术学院,郑州450002

出　　处：《河南科学》2008年第8期920-923,共4页Henan Science

基　　金：河南省科技攻关项目资助(0624430003)

摘　　要：为建立一种快速测定小麦中微量铜的新方法,选用河南不同地区种植的南阳彩色小麦为样品,微波消解处理后,采用标准加入直读离子选择性电极法测定样品中的微量铜,并对测定条件进行优化.结果表明,Cu2+检出限为0.027 5μg/g,用1.0 mg/L Cu2+标准溶液测定的RSD=7.2%,加标回收率介于90.5%—105.4%(n=11),与国标火焰原子吸收法对照测定无显著性差异.该法具有快速、简便、准确、直观、便于现场直接检测等显著优点,用于样品的快速测定结果令人满意.In order to establish a new rapid determination method of copper in color wheat, selecting grey wheat, blue wheat,common.violet wheat and hard violet wheat which plant in Henan province as the raw materials, copper-selective electrode with direct-reading concentration after adding to reference material method is adopted when sample is digested by microwave. The results show that the relative standard deviations is 7.2 %, the lowest detection limit of copper is 0.027 5 μg/g. The recoverty is range of 93.5 %-103.4 % （n=11）. This method is found to be quick, simple, accurate, directing and the analytical result is satisfactory.

关 键 词：标准加入直读法 离子选择型电极 快速测定 南阳彩色小麦 

分 类 号：S132[农业科学—农业基础科学]