| 气相色谱－质谱法测定食品接触材料中2-甲基-1，3-丙二醇和新戊二醇的迁移量 |
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| 基金项目:国家重点研发计划项目（2016YFF0203705）；广州海关科研项目（2021GZCK12，2020GZCK-026） |
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| 中文摘要:建立了食品接触材料中2-甲基-1，3-丙二醇（MPO）和新戊二醇（NPG）迁移量的气相色谱－质谱（GC－MS）检测方法。食品接触材料经迁移试验后，所得浸泡液经苯硼酸溶液衍生化、正己烷萃取后，GC－MS测定。结果表明，该方法在优化条件下的线性相关性良好，相关系数（r2）大于0.995；MPO和NPG在4%乙酸、10%乙醇、50%乙醇和异辛烷中的检出限均为0.01 mg/L；线性范围均为0.02～0.10 mg/L；在95%乙醇中，MPO的检出限为0.30 mg/L，线性范围为0.50～1.6 mg/L，NPG的检出限为0.03 mg/L，线性范围为0.05～0.16 mg/L。该方法在低、中、高3个浓度水平的平均回收率为85.0%～112%，相对标准偏差（RSD）为0.60%～9.5%。该方法的检测结果准确、灵敏度高，能较好地实现食品接触材料及制品中MPO和NPG迁移量的测定，满足我国法规的限量要求。 |
| 中文关键词:2-甲基-1，3-丙二醇（MPO） 新戊二醇（NPG） 食品接触材料 气相色谱－质谱法（GC－MS） 衍生化法 |
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| Determination of Migration of 2-Methyl-1，3-Propanediol and 2，2- Methyl-1，3-Propanediol in Food Contact Materials by Gas Chromatography－Mass Spectrometry |
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| Abstract:A gas chromatography－mass spectrometry（GC－MS） was developed for the determination of migration of 2-methyl-1，3-propanediol（MPO） and 2，2-methyl-1，3-propanediol（NPG）in food contact materials. After the migration test of food contact materials，the obtained soaking solution was firstly derivatized with phenylboric acid solution，then extracted with n-hexane，and finally determined by GC－MS. Results showed that there were good linear relationship of this method in the optimized conditions，with correlation coefficients（r2） larger than 0.995. The detection limits for MPO and NPG in 4% acetic acid，10% ethanol，50% ethanol and isooctane were all 0.01 mg/L within linear ranges of 0.02－0.10 mg/L.The detection limit of MPO in 95% ethanol was 0.30 mg/L within a linear range of 0.50－1.6 mg/L. The detection limit for NPG in 95% ethanol was 0.03 mg/L within a linear range of 0.05－0.16 mg/L.The relative standard deviations（RSD） of this method were in the range of 0.60%－9.5%，and the average recoveries were 85.0%－112%.With the high accuracy and sensitivity，the method could be used to determine the migration of 2-methyl-1，3-propanediol and 2，2-methyl-1，3-propanediol in food contact coatings and plastic products， so as to meet the limited requirements of Chinese regulations. |
| Key Words:2-methyl-1,3-propanediol（MPO） 2,2-methyl-1,3-propanediol（NPG） food contact materials gas chromatography－mass spectrometry （GC－MS） derivatization method |
| 引用本文：贝荣华，陈湘颖，董犇，钟怀宁，陈燕芬，曾莹 ，陈胜，李丹，蔡汶静，郑建国.气相色谱－质谱法测定食品接触材料中2-甲基-1，3-丙二醇和新戊二醇的迁移量[J].分析测试学报,2021,40(11):1657-1662. |
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