摘要
建立了检测塑胶跑道面层中6种有害物质(环己基异氰酸酯(CHI)、2,4-甲苯二异氰酸酯(2,4-TDI)、2,6-甲苯二异氰酸酯(2,6-TDI)、六亚甲基二异氰酸酯(HDI)、萘-1,5-二异氰酸酯(NDI)和4,4'-二苯基甲烷二异氰酸酯(4,4'-MDI))含量的GC-MS检测方法,分别讨论了定量方式和萃取时间对6种有害物质回收率的影响。将样品剪碎至10~20目(0.85~2.00 mm)的颗粒,用10 mL乙酸乙酯萃取,室温下超声20 min,提取液用DB-17MS石英毛细管色谱柱(30 m×0.25 mm×0.25μm)分离,采用GC-MS法并选择离子检测,内标法定量。结果表明,在0.5~100.0 mg/L(4,4'-MDI在1.0~100.0 mg/L)浓度范围内,线性良好,相关系数均大于0.998,方法检出限范围为2.0~10.0 mg/kg,定量限范围为6.0~20.0 mg/kg;加标平均回收率在80.1%~100.8%之间,相对标准偏差(n=6)小于5.2%。该方法快速、准确,适用于塑胶跑道面层中有害物质的测定。
A method was developed for the determination of 6 harmful substances(cyclohexyl isocyanate(CHI),2,4-toluene diisocyanate(2,4-TDI),2,6-toluene diisocyanate(2,6-TDI),hexamethylene diisocyanate(HDI),naphthalene-1,5-diisocyanate(NDI)and 4,4'-diphenylmethane diisocyanate(4,4'-MDI))in surface layer of plastic runway by gas chromatography-mass spectrometer(GC-MS).The effects of recovery of 6 harmful substances by different quantitative methods and extraction time were discussed,respectively.The samples were cut to 20 to 10 meshe sieve(0.85~2.00 mm),extracted with 10 mL ethyl acetate for 20 min at room temperature.The samples were separated into DB-17MS quartz capillary column(30 m×0.25 mm×0.25μm).The samples were separated by GC-MS and quantified by internal standard method.The results showed that the correlation coefficientsr were more than 0.998,in the range of 0.5~100.0 mg/L(4,4'-MDI,0.5~100.0 mg/L).The limits of detection(LODs)were 2.0~10.0 mg/kg,the limits of quantitation(LOQs)were 6.0~20.0 mg/kg.The average recovery rate ranged from 80.1%to 100.8%,and the relative standard deviations(n=6)were less than 5.2%.This method could be suitable for the determination of harmful substances in surface layer of plastic runway rapidly and accurately.
作者
周良春
张晓飞
马俊辉
李双琦
ZHOU Liangchun;ZHANG Xiaofei;MA Junhui;LI Shuangqi(Chengdu Institute of Product Quality Inspection and Research Co.,Ltd.,National Center for Packaging Material Quality Supervision and Inspection,Chengdu Institute of Product Quality Supervision and Inspection,Chengdu,Sichuan 610100,China)
出处
《塑料》
CAS
CSCD
北大核心
2020年第1期134-138,共5页
Plastics
关键词
气相色谱质谱法
塑胶跑道
二异氰酸酯
超声提取
有害物质
gas chromatography-mass spectrometry
plastic runway
diisocyanate
ultrasonic extraction
harmful substances