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目的:建立气相色谱法测定薄荷传统饮片及薄荷新型饮片中薄荷脑的含量。方法:色谱柱:HP Inno-wax(30 m×0.320 mm×0.5μm);进样口温度:250℃;FID检测器温度:250℃;初始温度120℃,保持2 min后以5℃/min的速率升温至150℃,保持6 min;以15℃/min的速率升温至220℃,保持6.667 min。分流比:20∶1;载气:N2;体积流量:1.0 mL/min。结果:薄荷脑在0.034～1.36 g.L-1的范围内呈良好线性关系(r=0.9998),加样回收率为99.68%,RSD为3.23%(n=6)。结论:本测定方法快捷,灵敏,准确,重现性好,可用作薄荷新型饮片和薄荷传统饮片的质量控制。
Objective: To establish a method for the determination of menthol in traditional peppermint and new peppermint peppermint tablets by gas chromatography. Method: Column: HP Inno-wax (30 m × 0.320 mm × 0.5 μm); inlet temperature: 250 ℃; FID detector temperature: 250 ℃; initial temperature of 120 ℃; The temperature was raised to 150 ° C for 6 min; the temperature was increased to 220 ° C at a rate of 15 ° C / min, maintaining 6.667 min. Split ratio: 20: 1 Carrier gas: N2 Volume flow: 1.0 mL / min. Results: Menthol showed a good linearity (r = 0.9998) in the range of 0.034-1.36 g · L -1, with a recovery of 99.68% and RSD of 3.23% (n = 6). Conclusion: The method is fast, sensitive, accurate and reproducible. It can be used for quality control of new mint slices and mint traditional slices.