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顶空/气相色谱-质谱法测定圆珠笔中8种挥发性苯系物
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作者单位
李长于,廖上富,胡丹,叶涛 浙江方圆检测集团股份有限公司 
基金项目:浙江省质量技术监督系统科研计划项目资助(20180346)
中文摘要:建立了顶空/气相色谱-质谱法测定圆珠笔中8种挥发性苯系物(苯、甲苯、乙苯、对二甲苯、间二甲苯、异丙苯、邻二甲苯和苯乙烯)含量的分析方法。选择顶空平衡温度和时间分别为70 ℃和40 min,以HP-INNOWax色谱柱(60 m×320 μm×0.25 μm)分离,采用选择离子监测模式(SIM)检测,外标法定量。结果显示,8种苯系物在0.005~0.5 mg/L质量浓度范围内均与对应的峰面积呈良好的线性关系(r2>0.999),检出限(S/N=3)为0.01~0.02 mg/kg,加标回收率为86.0%~104%,相对标准偏差(RSD)为2.3%~9.6%。该方法操作简单,快速,且灵敏度高,适用于圆珠笔中挥发性苯系物的快速检测。
中文关键词:顶空/气相色谱-质谱法  圆珠笔  苯系物
 
Determination of Eight Volatile Benzene Homologues in Ball-point Pen by Headspace Gas Chromatography-Mass Spectrometry
Abstract:A method of headspace gas chromatography-mass spectrometry(HS/GC-MS) was developed for the determination of eight volatile benzene homologues,i.e.benzene,toluene,ethylbenzene,p-xylene,m-xylene,isopropylbenzene,o-xylene and styrene in ball-point pen.The equilibrium temperature and time for headspace sampler were set at 70 ℃ and 40 min,respectively.The analytes were separated on an HP-INNOWax column(60 m×320 μm×0.25 μm),then detected in selected-ion monitoring mode and quantified by external standard method.Results showed that the standard curves for eight benzene homologues were linear over the concentration range of 0.005-0.05 mg/L with the linear correlation coefficients greater than 0.999.The detection limits of the method(S/N=3) were in the range of 0.01-0.02 mg/kg.The spiked recoveries ranged from 86.0% to 104% with RSDs of 2.3%-9.6%.The method is simple,rapid and high sensitive,and is suitable for the determination of volatile benzene homologues in ball-point pen.
Key Words:headspace gas chromatography-mass spectrometry(HS/GC-MS)  ball-point pen  benzene homologues
引用本文:李长于,廖上富,胡丹,叶涛.顶空/气相色谱-质谱法测定圆珠笔中8种挥发性苯系物[J].分析测试学报,2019,(6):739-743.
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