南阳彩色小麦面粉中微量铜的快速测定方法研究  

Study on Rapid Determination of Trace-copper in Nanyang Color Wheat Flour

作　　者：高向阳[1] 冉慧慧 王坤[1] 宫安晶[1] 

机构地区：[1]河南农业大学食品科学技术学院,河南郑州450002 [2]保定市质量监督局,河北保定071000

出　　处：《食品科学》2007年第6期274-277,共4页Food Science

基　　金：河南省科技攻关项目(0624430003)

摘　　要：目的:建立一种快速测定小麦面粉中微量铜的新方法。方法:以南阳彩色小麦和周麦16为材料,在密闭容器中用微波压力快速消解样品,用离子选择性电极浓度直读法快速测定了样品中的铜,对测定条件进行了优化,并与国家颁布标准方法(GB/T5009.13-2003)进行对照测定。结果:加标回收率为86.5%～102.0%,RSD为1.1%～3.1%(n=11),铜的最低检出限为0.0026mg/L,测定的线性范围为0.032～65mg/L,相关系数为0.997,电极的斜率为25.363。结论:用该法与国标方法对照测定样品并进行显著性检验表明,该方法具有直观、简便、灵敏、快速、准确、适于现场进行测定的显著优点,结果令人满意。Objective： To establish a new determination method of trace-copper in Nanyang color wheat. Methods： Selecting Nanyang grey wheat, blue wheat, common violet wheat, viotet hard-wheat and Zhou wheat 16 as the raw materials, copper-selective electrode with direct reading concentration method was＇ adopted. It compared it with the China Standard （GB/T5009.13 - 2003） for determining trace copper in Nanyang color wheat, after the samples being digested by highpressure microwave. Results： The-recovery is in range 86.5%- 102.0% by standard addition method. The relative standard deviations（RSD） is between 1.1%-3.1%（n=11）. The lowest detection limit of copper is 0.0026 mg/L. The linear range is 0.032-65 mg/L. Conclusions： This method is found to be direct-reading, quick, simple, sensitive and accurate. The analytical results are satisfactory.

关 键 词：离子选择性电极 浓度直读法 微量铜 微波消解 南阳彩色小麦 快速测定 

分 类 号：TS211.7[轻工技术与工程—粮食、油脂及植物蛋白工程]