碱融-灰化-离子色谱法测定食品中的氟化物  

Determination of Fluoride in Food by Alkali-Melting-Ashing Ion Chromatography

作　　者：彭超 李佳宽 涂凤琴 朱有涛 邵梅 姚浩 PENG Chao;LI Jiakuan;TU Fengqin;ZHU Youtao;SHAO Mei;YAO Hao(Wuhan Institute for Food and Cosmetic Control,Wuhan 430040,China;State Key Laboratory of Market Regulation,Edible Oil Quality and Safety,Wuhan 430040,China)

机构地区：[1]武汉食品化妆品检验所,湖北武汉430040 [2]国家市场监督管理总局重点实验室(食用油质量与安全),湖北武汉430040

出　　处：《食品安全导刊》2024年第35期94-99,共6页China Food Safety Magazine

基　　金：国家市场监督管理总局科技计划项目(No.2022MK151)。

摘　　要：目的:建立碱熔-灰化-离子色谱法测定食品中氟化物的方法。方法:样品经氢氧化钠熔融灼烧,马弗炉灰化,过滤后采用离子色谱仪检测。目标物经阴离子色谱柱分离,外标法定量。结果:方法的线性范围为0~2.000 mg·L^(-1),相关系数为0.9991;检出限为0.2 mg·kg^(-1),定量限为0.5 mg·kg^(-1)。按照实验方法测定不同食品基质,动物性农产品回收率为81.3%~95.7%,相对标准偏差为3.16%~6.57%;植物性农产品回收率为81.3%~89.6%,相对标准偏差为3.28%~7.19%;加工食品回收率为81.8%~94.9%,相对标准偏差为1.97%~6.83%;质控样品结果符合标示要求。结论:方法精密度、重复性、准确度表现良好,稳定可靠,可为食品中氟化物的监管工作提供技术支持。Objective:To establish a method for the determination of fluoride in food by alkali fusion-ashing-ion chromatography.Method:The samples were melted and calcined with sodium hydroxide,ashed in a muffle furnace,filtered and detected by ion chromatography.The target compounds were separated by anion chromatography column and quantified by external standard method.Result:The linear range of the method was 0~2.000 mg·L^(-1),and the correlation coefficient was 0.9991;the detection limit was 0.2 mg·kg^(-1),and the quantification limit was 0.5 mg·kg^(-1).According to the experimental method,the recovery rates of animal agricultural products were 81.3%~95.7%,and the relative standard deviations were 3.16%~6.57%;the recovery rates of plant agricultural products were 81.3%~89.6%,and the relative standard deviations were 3.28%~7.19%;the recovery rates of processed foods were 81.8%~94.9%,and the relative standard deviations were 1.97%~6.83%;the results of quality control samples met the labeling requirements.Conclusion:The method has good precision,repeatability and accuracy,is stable and reliable,and can provide technical support for the supervision of f luoride in food.

关 键 词：碱融 灰化 离子色谱 氟 食品 

分 类 号：TS207.3[轻工技术与工程—食品科学] O657.7[轻工技术与工程—食品科学与工程]