手机涂料及涂膜中邻苯二甲酸酯类有害物质的测定

涂料经溶剂提取或涂膜经索氏提取后,提出液中邻苯二甲酸酯类单体DEHP、DBP、BBP、DNOP可用DB-130.0m×φ0.25mm×0.5μm色谱柱同时分离,GC-FID或GC-MSD全扫描测定,DINP、DIDP宜采用GC-MSD选择离子扫描单独测定。采用GC-MSD测定时,方法的回收率不低于95%,DEHP、DBP、BBP、DNOP的最小检出限(LODs)均为0.04μg/mL,最低定量限(LOQ)均为0.35μg/mL。选择扫描时,DINP、DIDP的LODs、LOQ分别为0.4μg/mL、3.5μg/mL。实验结果表明:某些丙烯酸树脂涂料以及手机外壳涂层含有高含量生殖致癌物PAEs类单体,应为制定手机涂料中邻苯二甲酸酯类有害物质最高允许限量进行评价。

Determination of Harmful PAEs in Mobile Coating and Paint Films

After coating film was extracted by soxhlet method,phthalate ester compounds of DEHP, DBP,BBP,DNOP,DINP and DIDP in extraction solution could be separated by chromatographic column DB - 1 30.0 m×φ0.25 mm xO.5 |xm.Those four compounds(DEHP,DBP,BBP and DNOP) could be determined using Flame Ionization Detector(FID) or Mass Spectrograph Detector(MSD),whereas the other two compounds(DINP and DIDP) could only be measured using MSD with Selected Ion Monitoring (SIM).For DEHP,DBP,BBP and DNOP,when MSD was employed as detector,the limits of detection (LODs) were 0.04μg/mL and the limits of quantity(LOQs) 0.35μg/mL for all for DINP and DIDP,the LODs were 0.04μg/mL,and the LOQs were 3.5μg/mL.The results of the experiment(s) showed that carcinogenic PAEs exists in members of the acrylic resin coatings and film coat of mobile,Therefore its necessary to conduct safety evaluation and establish the allowable maximum concentration in mobile coatings.