该研究旨在对市售纸质吸管中3-氯-1,2-丙二醇(3-chloro-1,2-propanediol,3-MCPD)和1,3-二氯-2-丙醇(1,3-dichloro-2-propanol,1,3-DCP)的含量进行调查分析,并对其向饮料迁移的情况进行研究。采用冷水提取法对纸质吸管中的3-MCPD和1,3-DCP进行提取,超声辅助分散液相微萃取方法进行富集和衍生化,气相色谱-质谱联用进行分析检测。结果表明,20种市售纸质吸管中,3-MCPD检出率为65%,其含量为79.0~2 289.6 ng/g;1,3-DCP检出率为70%,其含量为5.3~104.9 ng/g;随着时间延长和温度上升,纸质吸管中氯丙醇向饮料迁移的量呈增加趋势;在温度为室温、时间为30 min时,3-MCPD迁移的总体检出率为16.7%,迁移量为7.8~60.5 ng/mL,1,3-DCP的总体检出率为13.3%,迁移量为2.9~8.4 ng/mL。研究结果有望为进一步系统评估纸质吸管中氯丙醇的潜在风险提供参考。
To analyze the contents and their migration behavior to beverages, 3-chloro-1, 2-propanediol (3-MCPD) and 1, 3-dichloro-2-propanol (1,3-DCP) in commercially available paper straws were extracted by cold-water, enriched and derivatized by ultrasound-assisted dispersive liquid-liquid micro-extraction method (UA-DLLME).Then they were detected by gas chromatography-mass spectrometry (GC-MS). The results showed thatamong the 20 kinds of analyzed commercialized paper straws, the positive rate of 3-MCPD was 65%, and its content ranged from 79.0 to 2 289.6 ng/g.While the positive rate of 1,3-DCP was 70%, and its content ranged from 5.3 to 104.9 ng/g. The migration amount of chloropropanol from paper straws to beverages increasedwith the extension of time and the rise of temperature.At room temperature and 30 min, the detection rate of 3-MCPD migration was 16.7%, and the migration amount ranged from 7.8 to 60.5 ng/mL.For the detection rate of 1,3-DCP migration which was 13.3%, and the migration amount ranged from 2.9 to 8.4 ng/mL. These results could provide a reference for further systematic evaluation of the potential risk of chloropropanol in paper straws.
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