英文摘要 |
Phenformin was prohibited by the ROC Department of Health in 1978. In this investigation, a GC-MS was used for the detection of phenformin in herbal preparation produced in Mainland China followed by determination by HPLC. For GC-MS, a HP-5MS capillary column was used. The initial column temperature was at 100°C for 2 min, ramping 10°C/min to 280°C, then holding at 280°C for 15 min. Ionization source temperature was at 230°C, and 70 eV electron impact mode was employed. HPLC was performed on a Cosmosil 5C18 AR (5 cm × 4.6 mm), and a μBondpak phenyl (30 cm × 3.9 mm) column using 0.01M potassium dihydrogenphosphate (pH 6.55) - acetonitrile (60:40, v/v) as eluent, with flow rate at 1.0 mL/min and detection wavelength set at 235 nm. Metformin was used as the internal standard. The interday and intraday precisions were less than 1.6%. The limit of detection and the limit of quantitation were 0.065 μg/mL and 0.20 μg/mL, respectively. The spike recovery was 102.7%. The average content of phenformin in the preparation was 3.45 mg per capsule.
治療糖尿病之phenformin(芬法敏)由於使用後會造成乳酸中毒,行政院衛生署雖已於民國67年即禁用,然卻於某大陸藥品中檢出,因而引起我們研究的興趣。本研究係以氣相層析質譜儀鑑定該成分,續以高效液相層析儀分析其含量。氣相層析質譜儀設定條件如下:HP-5MS毛細氣相層析管,以70eV離子電能作電子撞擊式(EI mode)分析,起始溫度100℃維持2分鐘,再以每分鐘10℃之升溫速率,至280℃並維持15分鐘。高效液相層析分析條件如下:Cosmosil 5C18 AR (5 cm x 4.6 mm)及μBondpak phenyl (30 cm x 3.9 mm) 為分析之管柱,使用移動相為磷酸二氫鉀(pH 6.55):乙腈(40:60)。流速1 mL/min,偵測波長235 nm。以metformin為內部標準品。分析結果如下:同日間及異日間之測試,其相對標準偏差在1.6%以下。偵測極限及最低檢出量分別為0.065μg/mL及0.20μg/mL,添加回收率102.7%,檢體中平均含量為3.45 mg/膠囊。 |