特殊医学用途婴儿配方食品中氯的国标检测方法适用性

Applicability of the National Standard Detection Methods for Chlorine to Infant Formula for Special Medical Purposes

依据GB 5009.44—2016《食品安全国家标准食品中氯化物的测定》,对特殊医学用途婴儿配方食品中氯的检测方法适用性展开研究。结果表明:采用GB 5009.44—2016第三法(银量法)检测特殊医学用途婴儿配方食品中乳蛋白部分水解配方、乳蛋白深度水解配方、氨基酸配方得到的样品加标回收率分别为95%~108%、98%~125%、100%~106%,相对标准偏差为12.7%~32.9%;采用GB 5009.44—2016第一法(电位滴定法)得到的检测结果低于第三法检测结果。

The applicability of silver nitrate titration and potentiometric titration,two of the three detection methods for chlorine in food samples specified in the national standard GB 5009.44—2016,for infant formula for special medical purposes was evaluated.The results showed that the spiked recoveries of silver nitrate titration for partially hydrolyzed protein infant formula,extensively hydrolyzed protein infant formula,and amino acid-based infant formula for special medical purposes were 95%–108%,98%–125%and 100%–106%,respectively,and the relative standard deviations(RSD)for precision were between 12.7%and 32.9%.The results of potentiometric titration was lower than that of silver nitrate titration.