食用油脂中矽樹脂(Silicon Resin)檢驗方法之探討

DETERMINATION OF SILICON RESIN IN EDIBLE FATS AND OILS

本研究利用油脂與矽樹脂凝固點差異來達成分離目的，再利用原子吸收光譜儀偵測定量矽樹脂，以建立檢驗方法，進而了解市售食用油脂中矽樹脂之殘留情形。以本研究建立的方法添加siliconpolymer標準品於油脂中進行回收試驗，添加濃度分別為1,2,5,10及20ppm，其回收率介於97.8～111.0%之間。變異係數均在6%以下。本方法最低檢測限量為1ppm。檢體方面，計採購50件市售食用油脂，包括苦茶油、蔬菜油、葵花油、花生油、橄欖油、沙拉油、玉米胚芽油、清香油、紅花籽油及芥花油等國產及進口品，檢測結果除一件葵花油檢出殘留矽樹脂1.7ppm（食品添加物使用範圍及用量標準規定限量為50ppm）外，其餘均未檢出。

A method for the determination of silicon resin in edible fats and oils using atomic absorption spectrophotometry (AAS) was evaluated. The recoveries at 1～20 ppm spike levels varied between 97.8 and 111.0%. Fifty samples (34 domestic, 16 imported) were purchased from October 1994 to March 1995 in Taipei city. The monitoring results showed that only one sample was detected as positive with residues of silicon resin at 1.7 ppm which remains far less than the legal limit of silicon resin permitted in edible fats and oils (50 ppm) according to current regulations.