微波程序消解-共振光散射法测定生姜中的痕量镉  

Determination of Trace Cadmium in Ginger by Resonance Light Scattering Method with Microwave Digestion Procedure

作　　者：高向阳[1,2] 高桂雅 张娜[1] 赵琛[2] 

机构地区：[1]郑州科技学院食品科学系,郑州450064 [2]河南农业大学食品科学技术学院,郑州450002 [3]河南工程学院,郑州451191

出　　处：《中国调味品》2014年第2期92-96,共5页China Condiment

基　　金：河南省重点学科建设基金项目(10466-X-082301)

摘　　要：为建立一种快速测定食品中重金属痕量镉的新方法，以生姜为样品，碱性介质中，Cd2＋与溴化钾、邻菲罗啉反应生成多元配合物，利用共振光散射技术测定镉。结果表明：镉的最大共振散射光峰位于623．4 nm，镉的质量浓度在0～0．15μg/mL范围内与体系相对共振散射光强度有良好的线性关系，相关系数r为0．9984，检出限为0．012μg/mL；样品测定的 RSD＜3．2％（n＝5），回收率为93．2％～101．2％。该方法快速、简便、灵敏度高，为生姜中痕量镉的测定提供了参考。A new resonance light scattering （RLS）method for the rapid determination of cadmium in ginger is developed based on cadmium in alkaline medium;cadmium （Ⅱ）reacted with potassium bro-mide,1,10-phenanthroline monohydrate to generate multiple complexes,using resonance light scat-tering technique for determination of cadmium.The results show that cadmium has maximum reso-nance light scattering peak at 623.4 nm.A good liner relationship （r=0.9984）is observed between cadmium concentration within the range of 0~0.15μg/mL and relative scattered light intensity.The detection limit of cadmium is 0.012 μg/mL and the relative standard deviations （RSD）of precision （n=5）are less than 3.2%.The average recovery rates of cadmium in four kinds of ginger are 93.2%~101.2%（n=5）.This method is simple,rapid and sensitive,and it has provided references for the determination of trace cadmium in ginger.

关 键 词：共振光散射 生姜 镉 微波消解 

分 类 号：TS264.7[轻工技术与工程—发酵工程]