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采用顶空气相色谱法,以GDX-101为固定相,选择70℃温度下恒温15min的气液平衡条件,正丙醇为内标物,测定了庆大霉素中甲醇残留量。标准加入法回收率试验的平均回收率为94.9％,对同一试样重复测定7次,其RSD为0.53％。
The stationary phase of GDX-101 was selected as the stationary phase by headspace gas chromatography (GC-MS). The gas-liquid equilibrium conditions were selected at constant temperature of 70 ℃ for 15min. Propanol was used as the internal standard to determine the residual amount of methanol in gentamicin. The average recovery of the standard addition method was 94.9% and the RSD was 0.53% for the same sample seven times.