对二安替比林甲烷比色法测定食品中二氧化钛方法的探讨  

Discussion about using diantipyrylmethane colorimetry method to measure titanium dioxide content in food

作　　者：胡娴凤 沈海丽 Hu Xianfeng;Shen Haili(Wuxi Institute For Food Control ,Wuxi 214142)

机构地区：[1]无锡市食品安全检验检测中心,无锡214142

出　　处：《粮食与食品工业》2020年第3期69-71,共3页Cereal & Food Industry

摘　　要：用国标方法中的二安替比林甲烷比色法测小麦粉中二氧化钛含量时,背景吸收的干扰使得检测结果常常偏高,容易引起较大误差。本文对原有方法进行优化,改用一对一扣本底空白方式进行试验,提高了检测结果的准确性。优化后的比色法标准曲线线性相关系数为0.9995,回收率在91.0%~100.4%之间,数值可靠。用优化后的检测结果与电感耦合等离子体-原子发射光谱法的结果进行对比,相对误差符合标准要求。When using the national standard diantipyrylmethane colorimetry method to measure the content of titanium dioxide in wheat flour,the interference of background absorption makes the detection result higher oftenly,which is easy to cause large error.In order to improve the accuracy of test results,this article optimizes the original method,using the method of one-to-one deduction of background blank to test.For the optimized colorimetry,the linear correlation coefficient of the standard curve is 0.9995,the recovery ranges from 91.0%to 100.4%,and the result value is reliable.Compared with the results of ICP-AES,their relative error also meets the standard requirement.

关 键 词：比色法 二氧化钛 探讨 

分 类 号：TS210.7[轻工技术与工程—粮食、油脂及植物蛋白工程]