离子选择电极法测定食品接触用纸中氟含量  

Determination of Fluorine in Food-Contact Paper by Ion-Selective Electrode Method

作　　者：卢诗强 刘能模 詹雨婷 杨青华 林勤保[3] 马洪生 LU Shiqiang;LIU Nengmu;ZHAN Yuting;YANG Qinghua;LIN Qinbao;MA Hongsheng(Zhuhai Hongta Renheng Packaging Co.,Ltd.,Zhuhai Guangdong 519070,China;Zhili Technology(Guangdong)Co.,Ltd.,Guangzhou 510000,China;College of Packaging Engineering,Jinan University,Zhuhai Guangdong 519070,China)

机构地区：[1]珠海红塔仁恒包装股份有限公司,广东珠海519070 [2]知里科技(广东)有限公司,广东广州510000 [3]暨南大学包装工程学院,广东珠海519070

出　　处：《包装学报》2024年第6期72-80,共9页Packaging Journal

基　　金：珠海市产学研协同创新计划项目(2220004003084)。

摘　　要：为加强对我国纸包装行业中全氟和多氟烷基物质合规性的监管,通过采用不同样品前处理,结合离子选择电极法建立食品接触用纸中总氟、无机氟和可提取有机氟含量的测定方法,并对市面收集的纸样进行筛查分析。实验结果表明:3种氟含量测定方法均具有良好线性关系,总氟的检出限(LOD)、定量限(LOQ)分别为2.50,6.25 mg/kg,无机氟的LOD、LOQ分别为0.30,0.75 mg/kg;可提取有机氟的LOD、LOQ分别为0.50,2.00 mg/kg。3种方法加标回收率为80%~120%,精密度均小于10%(n=6)。所筛查的48种食品接触用纸中总氟含量为(9.44±0.12)~(533.77±18.20)mg/kg,与欧盟限量要求相比,不合格率为29.2%,并且超过半数纸样中总有机氟含量不符合丹麦的限量规定。To strengthen the regulation of compliance concerning perfluoroalkyl and polyfluoroalkyl substances(PFAS)in domestic paper packaging industry,a determination method for total fluorine,inorganic fluorine,and extractable organic fluorine content in food contact paper was established by utilizing various sample pretreatment techniques in conjunction with ion-selective electrode(ISE).Subsequently,the established methods were applied to screen paper samples collected from the market.Three fluorine determination methods exhibited good linear correlations.The limit of detection(LOD)and limit of quantitation(LOQ)for total fluorine were 2.50 mg/kg and 6.25 mg/kg,respectively.For inorganic fluorine,the LOD and LOQ were 0.30 mg/kg and 0.75 mg/kg,respectively.For extractable organic fluorine,the LOD and LOQ were 0.50 mg/kg and 2.00 mg/kg,respectively.The recoveries for all methods ranged from 80% to 120%,with precision values below 10%(n=6).Screening results revealed that total fluorine content in 48 food contact paper samples varied from(9.44±0.12)to(533.77±18.20)mg/kg,with a non-compliance rate of 29.2%,compared to the EU limited requirements.More than half of the paper samples did not comply with the Danish regulations for total organic fluorine content limits.

关 键 词：全氟和多氟烷基物质 食品接触用纸 离子选择电极法 总氟 无机氟 可提取有机氟 

分 类 号：TB484.1[一般工业技术—包装工程]