QuEChERS-气相色谱—三重四极杆质谱法测定辣条中16种多环芳烃
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李莎,女,长沙县食品药品安全检测中心工程师,硕士。

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食品安全监测与预警湖南省重点实验室开放基金项目(编号:2020FKJJ09);湖南省市场监督管理局科技计划项目(编号:2021KJJH47)


Determination of 16 kinds of polycyclic aromatic hydrocarbons in spicy strip by QuEChERS gas chromatography-triple quadrupole mass
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    摘要:

    目的:有效提高辣条中多环芳烃污染风险预警和质量安全监管。方法:采用乙腈提取样品中的目标物,经含100 mg N-丙基乙二胺(PSA)、100 mg 十八烷基硅烷键合硅胶(C18)、1 000 mg中性氧化铝吸附剂的QuEChERS净化,选择DB-EUPAH色谱柱分离待测物,以气相色谱—三重四极杆质谱仪检测,采用多反应监测模式,基质匹配外标法定量。结果:16种PAHs在0.005~0.500 μg/mL范围线性良好,相关系数为0.998 4~0.999 9。方法的检出限和定量限分别为0.04~0.55 μg/kg 和0.12~1.85 μg/kg;10,20,100 μg/kg 三水平加标样品,16种PAHs平均加标回收率达71.54%~103.70%,相对标准偏差为2.4%~9.3%。采用该方法对20批次市售辣条样品中16种PAHs污染情况进行了分析,其中14批次样品检出多环芳烃,含量在0.42~42.28 μg/kg。结论:该方法操作简单、灵敏度高,适用于辣条中16种PAHs的日常检测。

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    Objective:This study aimed to effectively improve the risk warning and quality and safety supervision of polycyclic aromatic hydrocarbons (PAHs) in spicy strip.Methods: The target compounds in the samples were extracted with acetonitrile and purified by QuEChERS, containing 100 mg N-propyl ethylenediamine (PSA), 100 mg octadecylsilane bonded silica gel (C18), and 1 000 mg neutral alumina adsorbent, and then were separated by DB-EUPAH column. It was detected by gas chromatography-triple quadrupole mass spectrometer with multiple reaction monitoring mode and matrix matching external standard method.Results: The 16 kinds of PAHs showed good linearity in the range of 0.005~0.500 μg/mL, and the correlation coefficients were 0.998 4~0.999 9. The limits of detection and quantification were 0.04~0.55 μg/kg and 0.12~1.85 μg/kg, respectively. The average recoveries of 16 kinds of PAHs were 71.54%~103.70% with the relative standard deviations of 2.4%~9.3% at three-level spiked standard sample of 10, 20 and 100 μg/kg. The method was used to analyze the contamination of 16 kinds of PAHs in 20 batches of spicy strip. PAHs were detected in 14 batches with the content ranging from 0.42 μg/kg to 42.28 μg/kg.Conclusion: The method is easy to operate with high sensitivity, and suitable for daily detection of 16 kinds of PAHs in spicy strip.

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李莎,曾习文,申睿,等. QuEChERS-气相色谱—三重四极杆质谱法测定辣条中16种多环芳烃[J].食品与机械,2022,38(7):68-74.
LI Sha, ZENG Xi-wen, SHEN Rui, et al. Determination of 16 kinds of polycyclic aromatic hydrocarbons in spicy strip by QuEChERS gas chromatography-triple quadrupole mass[J]. Food & Machinery,2022,38(7):68-74.

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  • 在线发布日期: 2022-09-08
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