1.广州市疾病预防控制中心,广东 广州 510440
2.广州质量监督检测研究院,国家化妆品质量监督检验中心(广州),广东 广州 511447
谭建华,博士,教授级高级工程师,研究方向:色谱质谱检测技术,E-mail:tanjianhua0734@aliyun.com
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柳华春,梁文耀,王继才等.顶空气相色谱-质谱联用法测定化妆品中α-氯甲苯[J].分析测试学报,2021,40(08):1230-1234.
LIU Hua-chun,LIANG Wen-yao,WANG Ji-cai,et al.Determination of α-Chlorotoluene in Cosmetics by Headspace Gas Chromatography-Mass Spectrometry[J].Journal of Instrumental Analysis,2021,40(08):1230-1234.
柳华春,梁文耀,王继才等.顶空气相色谱-质谱联用法测定化妆品中α-氯甲苯[J].分析测试学报,2021,40(08):1230-1234. DOI: 10.19969/j.fxcsxb.20121001.
LIU Hua-chun,LIANG Wen-yao,WANG Ji-cai,et al.Determination of α-Chlorotoluene in Cosmetics by Headspace Gas Chromatography-Mass Spectrometry[J].Journal of Instrumental Analysis,2021,40(08):1230-1234. DOI: 10.19969/j.fxcsxb.20121001.
该文建立了一种适用于含苯扎氯铵的化妆品中α-氯甲苯的测定方法。首先通过气相色谱-质谱联用法(GC-MS)剖析苯扎氯铵热分解产物的成分,确证了苯扎氯铵类化合物在气相进样口会分解产生,α,-氯甲苯。采用气液平衡的顶空进样方式,并通过优化顶空进样参数、色谱分离和质谱测定条件,建立了一种化妆品中,α,-氯甲苯的新型分析方法。选择顶空平衡温度和时间分别为80 ℃和30 min,样品于顶空瓶中用8 mL水和1.0 g氯化钠分散,以HP-INNOWax色谱柱(60 m × 0.25 mm × 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:α-氯甲苯在0.01~5.00 μg/mL质量浓度范围内与对应的峰面积呈良好的线性关系(,r, = 0.999),方法检出限和定量下限分别为0.02 μg/g和0.05 μg/g,加标回收率为91.3%~98.8%,相对标准偏差(RSD)为1.5%~4.9%。该方法操作简便,快速,灵敏度高,专一性好,能有效解决现有方法假阳性干扰的问题,适用于各种化妆品中α-氯甲苯的准确测定。
A method was developed for the determination of α-chlorotoluene in cosmetics containing benzalkonium chloride. Firstly, the thermal decomposition products of benzalkonium chloride was analyzed by gas chromatography-mass spectrometry(GC-MS). A phenomenon was confirmed that benzalkonium chloride and similar compounds will decompose into α-chlorotoluene at the inlet of GC-MS. Then, a new analytical method for α-chlorotoluene in cosmetics was developed by a headspace injection mode of gas-liquid equilibrium. The headspace sampling parameters, chromatographic separation and mass spectrometry conditions were optimized. The equilibrium temperature and time for headspace sampler were set at 80 ℃ and 30 min, respectively. The sample was dissolved with 8 mL water and 1.0 g sodium chloride in headspace bottle. The analytes were separated on an HP-INNOWax column(60 m × 0.25 mm × 0.25 μm), then detected in selectedion monitoring mode and quantified by external standard method. Results showed that the standard curves for α-chlorotoluene were linear over the concentration range of 0.01-5.00 μg/mL with linear correlation coefficients(,r,) of 0.999. The detection limits and quantification limits of the method were 0.02 μg/g and 0.05 μg/g, respectively. The spiked recoveries ranged from 91.3% to 98.8% with relative standard deviations(RSDs) of 1.5%-4.9%. The method is simple, rapid, high sensitive and specific, and it is suitable for the determination of α-chlorotoluene in cosmetics.
α-氯甲苯化妆品苯扎氯铵热降解顶空气相色谱-质谱联用法(HS-GC-MS)
α-chlorotoluenecosmeticsbenzalkonium chloridethermal degradationheadspace gas chromatography-mass spectrometry (HS-GC-MS)
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