| 全二维气相色谱-飞行时间质谱法测定消费品中20种邻苯二甲酸酯类塑化剂 |
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| 基金项目:国家重点研发计划资助项目(2016YFF0203702)；海关总署科研项目(2019HK070) |
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| 中文摘要:该文建立了日用消费品中20种邻苯二甲酸酯类塑化剂的全二维气相色谱-飞行时间质谱(GC×GC-TOF MS)筛查与定量检测方法。样品破碎后采用正己烷超声提取，提取液经石墨化炭黑(GCB)和无水硫酸镁(MgSO4)分散固相萃取净化，GC×GC-TOF MS检测，飞行时间质谱定性，外标法定量。结果显示，20种邻苯二甲酸酯类塑化剂在0.03~30 mg/L质量浓度范围内呈良好线性，相关系数(r2)大于0.99，方法的检出限为0.09~22.13 mg/kg，定量下限为0.25~63.1 mg/kg，在低、中、高3个加标浓度水平下的回收率为63.2%~120%，相对标准偏差(RSD,n=6)为0.30%~10%。将该方法用于实际样品检测，在1例塑料样品中检出邻苯二甲酸二异壬酯，含量为1.55 mg/kg，在1例橡胶样品中检出邻苯二甲酸二丁酯和邻苯二甲酸二(2-乙基)己酯，含量分别为1.48 mg/kg和7.66 mg/kg。该方法准确、高效，前处理操作简单，可同时实现包含5种异构体的20种邻苯二甲酸酯类塑化剂的筛查和确证。 |
| 中文关键词:全二维气相色谱-飞行时间质谱 邻苯二甲酸酯 分散固相萃取 消费品 |
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| Determination of 20 Phthalates in Consumer Products by Two-dimensional Gas Chromatography-Time-of-flight Mass Spectrometry |
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| Abstract:An analytical method was developed for screening and quantitative detection of 20 phthalates (PAEs) in consumer products by two-dimensional gas chromatography-time of flight mass spectrometry(GC×GC-TOF MS).Samples were shattered,and followed by ultrasonic extraction with hexane.The extract was purified by dispersive solid phase extraction(dSPE) with graphitized carbon black(GCB) and magnesium sulfate anhydrous(MgSO4),analyzed by time-of-flight mass spectrometry and quantified by external standard method.Experimental results demonstrated that there were good linear relationships for 20 PAEs in the range of 0.03-30 mg/L with their correlation coefficients(r2) larger than 099.The limits of detection(LODs) and limits of quantitation(LOQs) were in the ranges of 0.09-2213 mg/kg and 0.25-63.1 mg/kg,respectively.The recoveries at low,medium and high three spiked levels ranged from 63.2% to 120% with relative standard deviations(RSDs,n=6) of 0.30%-10%.This method was practically used in the detection for different samples.Results showed that diisononyl phthalate was found containing 155 mg/kg in a plastic sample,and dibutyl phthalate and di(2-ethylhexyl) phthalate were 1.48 mg/kg and 7.66 mg/kg in a rubber sample,respectively.This method could be applied in the determination of 20 phthalates including 5 phthalate isomers in consumer products with accuracy,efficiency and easy pretreatment. |
| Key Words:two dimensional gas chromatography tandem with time of flight mass spectrometry phthalates dispersive solid phase extraction consumer products |
| 引用本文：周龙龙,薛秋红,罗忻,辛学谦,马强,叶曦雯,牛增元,孙忠松,王子涵.全二维气相色谱-飞行时间质谱法测定消费品中20种邻苯二甲酸酯类塑化剂[J].分析测试学报,2019,38(11):1301-1309. |
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