离子色谱法检测食品包装纸中乙二酸迁移量的研究

陈杰; 陈燕芬; 陈彩霞; 李函珂; 姚皓程; 董犇; 李丹; 钟怀宁; 王小慧

陈杰,陈燕芬,陈彩霞,李函珂,姚皓程,董犇,李丹,钟怀宁,王小慧.离子色谱法检测食品包装纸中乙二酸迁移量的研究[J].中国造纸,2026,45(8):208-215

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离子色谱法检测食品包装纸中乙二酸迁移量的研究

Study on Determination of Oxalic Acid Migration from Food Packaging Paper by Ion Chromatography

收稿日期：2026-04-30 修订日期：2026-05-26

DOI：10.11980/j.issn.0254-508X.2026.08.022

关键词: 食品包装纸乙二酸迁移实验离子色谱

Key Words:food packaging paper oxalic acid migration test ion chromatography

基金项目:广东省重点研发计划项目（2025B0202120004）。

作者	单位	邮编
陈杰^*	1广州海关技术中心,广东广州,510623	510623
陈燕芬	1广州海关技术中心,广东广州,510623	510623
陈彩霞	1广州海关技术中心,广东广州,510623	510623
李函珂	1广州海关技术中心,广东广州,510623	510623
姚皓程	1广州海关技术中心,广东广州,510623	510623
董犇	1广州海关技术中心,广东广州,510623	510623
李丹^*	1广州海关技术中心,广东广州,510623	510623
钟怀宁^*	1广州海关技术中心,广东广州,510623	510623
王小慧	2华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640	510640

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摘要:本研究采用离子色谱法建立了食品包装纸中乙二酸迁移量的检测方法，并利用该方法研究了7种食品包装纸在不同食品模拟物中的迁移规律。对于水、4%乙酸溶液、10%乙醇溶液、50%乙醇溶液和95%乙醇溶液（均为体积分数）5种食品模拟物，优化后的离子色谱条件为：Metrosep A Supp 19离子色谱柱（250 mm×4.0 mm×9.0 μm）和Metrosep A Supp 19 Guard保护柱（50 mm×4.0 mm×9.0 μm），以18 mmol/L碳酸钠+8 mmol/L碳酸氢钠+5%的丙酮混合液作为流动相进行等度洗脱，进样量20 μL，流速0.7 mL/min，柱温30 ℃，用抑制型电导检测器进行测定，外标法定量。结果表明，标准工作曲线线性关系良好，线性相关系数>0.995，检出限为0.08~0.15 mg/kg，定量限为0.025~0.50 mg/kg，加标回收率为90.2%~99.8%，精密度相对标准偏差（RSD，n=6）为2.1%~9.2%。对7款食品包装纸进行迁移量测试，发现4%乙酸浸泡液中乙二酸迁移量最高，95%乙醇浸泡液中迁移量最低（均未检出），且检测结果提示，不含阻隔涂层的纸基材料中的乙二酸迁移风险值得关注。

Abstract:This study established an ion chromatography (IC) method for the determination of oxalic acid migration in food packaging paper, and applied this method to investigate the migration behavior of seven food packaging papers in different food simulants. For five food simulants—water, 4% (v/v) acetic acid solution, 10% (v/v) ethanol solution, 50% (v/v) ethanol solution, and 95% (v/v) ethanol solution—the optimized IC conditions were as follows: a Metrosep A Supp 19 analytical column (250 mm×4.0 mm×9.0 μm) and a Metrosep A Supp 19 Guard column (50 mm×4.0 mm×9.0 μm), isocratic elution with a mobile phase composed of 18 mmol/L Na₂CO₃+8 mmol/L NaHCO₃+5% (v/v) acetone mixed solution, injection volume 20 μL, flow rate 0.7 mL/min, column temperature 30 °C, suppressed conductivity detection, and external standard quantification. The results showed that the calibration curves exhibited good linearity with correlation coefficients >0.995. The limits of detection (LOD) ranged from 0.08 to 0.15 mg/kg, and the limits of quantification (LOQ) ranged from 0.025 to 0.50 mg/kg. Spike recoveries were between 90.2% and 99.8%, and the precision relative standard deviation (RSD, n=6) ranged from 2.1% to 9.2%. Migration tests on seven food packaging papers revealed that the highest oxalic acid migration occurred in the 4% (v/v) acetic acid simulant, while the lowest migration (all below the detection limit) was found in the 95% (v/v) ethanol simulant. These findings suggested that the risk of oxalic acid migration from paper-based materials without barrier coatings warrants attention.

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