以聚焦式微波消化法及原子螢光光譜儀分析食用油脂類中砷含量   全文下載

Determination of Arsenic in Edible Fats and Oils by Focused Microwave Digestion and Atomic Fluorescence Spectrometer

本研究探討以聚焦式微波消化器（Focused Microwave Digester）前處理，及原子螢光光譜儀（Atomic Fluorescence Spectrometer）檢測食用油脂類中砷含量。將檢體0.5 g 加硫酸10 mL與硝酸5 mL，以聚焦式微波消化器加熱消化，再以原子螢光光譜儀檢測，儀器檢出限量為50 pg／mL 。添加砷0.05 ， 0.10 及0.20 ppm於棕櫚油中，其回收率分別為89.8 、93.0 及94.7% ，於橄欖油中回收率為86.4 、92.0 及96.9% ，於豬油中其回收率為86.9、91.2 及91.5%。分析市售食用油脂21 件，檢出範圍為0.005 ? 0.027 ppm ，均低於食用油脂類衛生標準之最大容許量（0.1 ppm）。

A method for the determination of arsenic in edible fats and oils was developed. A half-gram sample was digested with 10 mL sulfuric acid and 5 mL nitric acid by focused microwave digester, and then analyzed by atomic fluorescence spectrometer (AFS). The detection limit of the instrument was at 50 pg/mL. The recovery studies were performed at 0.05, 0.10 and 0.20 ppm spike levels of arsenic in palm oil, olive oil and lard. The recoveries were in range of 89.8∼ 94.7, 86.4∼ 96.9 and 86.9 ∼91.5%, respectively. Twenty-one market samples of edible fats and oils were analyzed to contain 0.005 ∼ 0.027 ppm of arsenic. 本研究探討以聚焦式微波消化器（Focused Microwave Digester）前處理，及原子螢光光譜儀（Atomic Fluorescence Spectrometer）檢測食用油脂類中砷含量。將檢體0.5 g 加硫酸10 mL與硝酸5 mL，以聚焦式微波消化器加熱消化，再以原子螢光光譜儀檢測，儀器檢出限量為50 pg／mL 。添加砷0.05 ， 0.10 及0.20 ppm於棕櫚油中，其回收率分別為89.8 、93.0 及94.7% ，於橄欖油中回收率為86.4 、92.0 及96.9% ，於豬油中其回收率為86.9、91.2 及91.5%。分析市售食用油脂21 件，檢出範圍為0.005 ∼ 0.027 ppm ，均低於食用油脂類衛生標準之最大容許量（0.1 ppm）。