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Determination of the migration of 2,6-diisopropylaniline and 2,6-diisopropylphenol from food-contact plant fiber/degradable plastics by ultra performance liquid chromatography
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Ren-Yue SUN1, Kai ZOU1, Li-Li JIN1, Shi-Peng LUO2, 3, *, Gui-Hua LIU2, 3, *
Journal of Food Safety & Quality | 2026, 17(2) : 19 - 26
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Journal of Food Safety & Quality | 2026, 17(2): 19-26
• Special Topic: Detection of Harmful Substances in Food Contact Materials •
Determination of the migration of 2,6-diisopropylaniline and 2,6-diisopropylphenol from food-contact plant fiber/degradable plastics by ultra performance liquid chromatography
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Ren-Yue SUN1, Kai ZOU1, Li-Li JIN1, Shi-Peng LUO2, 3, *, Gui-Hua LIU2, 3, *
Affiliations
  • 1.Changzhou Industrial and Consumable Products Inspection Co., Ltd., Changzhou 213000, China
  • 2.School of Chemistry and Chemical Engineering, Jiangsu University of Technology, Changzhou 213000, China
  • 3.Nanjing Customs District Testing Center for Dangerous Goods and Packaging, Changzhou 213000, China
doi: 10.19812/j.cnki.jfsq11-5956/ts.20251107004
Outline
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Objective

To establish a method for determination of the migration of 2,6-diisopropylaniline(2,6-DIPA) and 2,6-diisopropyphenol (2,6-DIPP) from food-contact plant fiber/degradable plastics by ultra performance liquid chromatography, and conduct a comprehensive study on the migration pattern of 2,6-DIPA from positive plant fiber/polylactic acid (PLA) samples.

Methods

Basing on optimized chromatographic conditions, the linear relationships and recoveries of 2,6-DIPA and 2,6-DIPP were validated in 4% acetic acid, 10% ethanol, 20% ethanol, 50% ethanol and 95% ethanol (V:V) soaking solution. The migration pattern of 2,6-DIPA was investigated from 4 dimensions.

Results

The method showed good linearity for both compounds, with limits of the detection of 0.010 mg/L (2,6-DIPA) and 0.003 mg/L (2,6-DIPP), and overall recoveries of 72.0%–109.0%. The migration amount of 2,6-DIPA was positively correlated with ethanol concentration, migration temperature and migration time, and negatively correlated with migration frequency. High temperature screening tests could replace some experimental conditions.

Conclusion

The integrated study indicates that the migration of 2,6-DIPA from plant fiber/PLA materials poses a potential health risk, requiring focused attention across various stages.

plant fiber/degradable plastics  /  food contact materials  /  ultra performance liquid chromatography  /  migration patterns
孙仁悦, 邹凯, 金莉莉, 罗世鹏, 刘桂华. 超高效液相色谱法测定食品接触用植物纤维/可降解塑料中2,6-二异丙基苯胺和2,6-二异丙基苯酚的迁移量. 食品安全质量检测学报, 2026 , 17 (2) : 19 -26 . DOI: 10.19812/j.cnki.jfsq11-5956/ts.20251107004
Ren-Yue SUN, Kai ZOU, Li-Li JIN, Shi-Peng LUO, Gui-Hua LIU. Determination of the migration of 2,6-diisopropylaniline and 2,6-diisopropylphenol from food-contact plant fiber/degradable plastics by ultra performance liquid chromatography[J]. Journal of Food Safety & Quality, 2026 , 17 (2) : 19 -26 . DOI: 10.19812/j.cnki.jfsq11-5956/ts.20251107004
Appendix
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Year 2026 volume 17 Issue 2
13
4
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Article Info
doi: 10.19812/j.cnki.jfsq11-5956/ts.20251107004
  • Receive Date：2025-11-07
  • Online Date：2026-11-05
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History
  • Received：2025-11-07
Funding
Affiliations
    1.Changzhou Industrial and Consumable Products Inspection Co., Ltd., Changzhou 213000, China
    2.School of Chemistry and Chemical Engineering, Jiangsu University of Technology, Changzhou 213000, China
    3.Nanjing Customs District Testing Center for Dangerous Goods and Packaging, Changzhou 213000, China
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表12种不同金属材料的力学参数
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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