氯酸钾-亚甲基蓝体系催化光度法测定干制水产品中甲醛  

Catalytic Spectrophotometic Determination of Formaldehyde in Dried Aquatic Products Based on a Potassium Chlorate-Methylene Blue System

作　　者：易灵红 郭峰君[1] 唐秋霞 YI Linghong;GUO Fengjun;TANG Qiuxia(Beihai Vocational College,Beihai 536000,China)

机构地区：[1]北海职业学院,广西北海536000

出　　处：《现代食品》2022年第20期170-173,共4页Modern Food

基　　金：2021年广西高校中青年教师科研基础能力提升项目(2021KY1440)。

摘　　要：本文建立基于氯酸钾-亚甲基蓝体系的催化动力学光度法,用于测定干制水产品中甲醛含量。在最优条件下,甲醛在0~1.4μg·mL^(-1)与吸光度差值呈良好的线性关系,线性方程为ΔA=0.2941c−0.0025,相关系数R^(2)为0.9978,检出限为0.11μg·mL^(-1),相对标准偏差(n=5)为1.9%~5.3%,回收率在94.90%~101.85%。该方法可应用于水产品虾仁干和鱿鱼干中甲醛的直接测定。A catalytic kinetic spectrophotometric method for the determination of formaldehyde in dried aquatic products based on a potassium chlorate-methylene blue system was established.Under the optimal conditions,there was a linear relationship between the difference of absorbance of methylene blue and the concentration of formaldehyde in the range of 0~1.4μg·mL^(-1).The linear equation wasΔA=0.2941c−0.0025,the correlation coefficient was 0.9978,the detection limit was 0.11μg·mL^(-1),the relative standard deviation(n=5)was 1.9%~5.3%and the recovery was 94.90%~101.85%.The method was successfully applied to the determination of formaldehyde in dried shrimps and squid directly.

关 键 词：氯酸钾 亚甲基蓝 催化动力学 甲醛 

分 类 号：TS254.5[轻工技术与工程—水产品加工及贮藏工程]