气相色谱-质谱联用法研究硅橡胶中甲基环硅氧烷向食品模拟液的迁移

Migration characteristics of dimethylcydosiloxane in silicone rubber into food simulants by gas chromatography-mass spectrometry

中文关键词:  硅橡胶  甲基环硅氧烷  气相色谱-质谱联用法  迁移量

英文关键词:silicone rubber  dimethylcydosiloxane  gas chromatography-mass spectrometry  migration amount

中文摘要:

      目的 探究市售硅橡胶蒸篦中的甲基环硅氧烷类有毒物质的迁出规律, 对食品接触硅橡胶材料使用安全性进行评价。方法 将市售硅橡胶蒸篦在实际使用温度(100 ℃热空气)下进行老化, 并用不同食品模拟液(水、4%乙酸(V:V)、正己烷)对其进行处理, 利用气质联用(GC-MS)分析仪对其中甲基环硅氧烷类有毒物质的迁出量进行检测。结果 以正己烷为模拟液时, 硅橡胶中分子量较低的甲基环硅氧烷在4 h时已全部迁出至模拟液中, 而以超纯水和4%乙酸为模拟液时, 没有有机小分子的迁出。结论 食品接触硅橡胶材料在中性和酸性条件下使用安全, 但在油性环境下使用会存在安全隐患。

英文摘要:

      Objective To evaluate the safety of food contact silicone according to investigating the migration characteristics of dimethylcydosiloxane in commercially available silicone. Methods The commercially available silicon rubber steaming grates were aged under the actual temperature (100 ℃ hot air), and then treated by different food simulants (water, 4% acetic acid (V:V) and hexane), and migration quantity of dimethylcydosiloxane were detected by gas chromatography-mass spectrometry (GC-MS). Results When using n-hexane as a food simulant, the low molecular weight dimethylcydosiloxane had totally migrated into the food simulant after 4h migration. However in water and 4% acetic acid (V:V), dimethylcydosiloxane was not detected. Conclusion Food contact silicone is safety using in neutral and acidic conditions, but when using in oily conditions, there will be a security risk.