Content and Extraction Characteristics of Two Chloropropanol Contaminants in Food-contact Paper Products

MENG Fanchao; LIU Jinpeng; LIU Xinxing

doi:10.19554/j.cnki.1001-3563.2026.19.012

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Packaging Engineering ›› 2026, Vol. 47 ›› Issue (19) : 116-121. DOI: 10.19554/j.cnki.1001-3563.2026.19.012

Agro-products Preservation and Food Packaging

Content and Extraction Characteristics of Two Chloropropanol Contaminants in Food-contact Paper Products

MENG Fanchao¹, LIU Jinpeng¹, LIU Xinxing^2,*

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Abstract

The work aims to investigate the concentrations of two chloropropanols contaminants in commercially available food-contact paper products and their release characteristics under different extraction conditions. A total of 166 batches of commercially available food-contact paper products (including paper straws, paper cups/bowls, greaseproof paper, molded pulp products, general packaging paper, and kitchen towel paper) collected between 2023 and 2025 were analyzed. Extraction was performed according to the extraction test conditions specified in GB 4806.8-2022. The contents of 1,3-dichloro-2-propanol (1,3-DCP) and 3-chloro-1,2-propanediol (3-MCPD) in the extracts were determined by gas chromatography-mass spectrometry. Two chloropropanols contaminants were detected in all six categories of paper products, with detection rates ranging from 23% to 80%. Except for paper straws, the other five product categories exhibited exceedances of regulatory limits, with rates ranging from 5% to 80%. Kitchen towel paper and greaseproof paper demonstrated notably higher contamination levels, with a maximum detected value of 902 μg/L for 3-MCPD. The detection rate of 1,3-DCP was relatively low across product types, with 3-MCPD being the primary chloropropanols contaminant. Regarding extraction conditions, the detected values of 3-MCPD under cold-water extraction (23 ℃, 24 h) were generally higher than those under hot-water extraction (80 ℃, 2 h), with the former being 1.1 to 2.0 times the latter. In conclusion, chloropropanols contaminants are in commercially available food-contact paper products, with some products posing potential exceedance risks. Particularly, kitchen towel paper and greaseproof paper show elevated contamination levels. Chloropropanols are more prone to extraction under prolonged immersion at room temperature.

Key words

food-contact paper products / chloropropanols / 1,3-dichloro-2-propanol / 3-chloro-1,2-propanediol / wet-strength agent

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MENG Fanchao, LIU Jinpeng, LIU Xinxing. Content and Extraction Characteristics of Two Chloropropanol Contaminants in Food-contact Paper Products[J]. Packaging Engineering. 2026, 47(19): 116-121 https://doi.org/10.19554/j.cnki.1001-3563.2026.19.012

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