HPLC法测定甲基苯丙胺与苯丙胺

目的 建立甲基苯丙胺(methamphetamine,MA)和苯丙胺(amphetamine,AMP)的反相高效液相色谱测定方法.方法 采用C18柱,以甲醇-磷酸盐缓冲液为流动相,流速1.0 mL/min,检测波长为215 nm,同时收集190～360 nm的紫外光谱图,并以此与保留时间作为定性依据.在定性的基础上,建立定量检测方法,并对方法进行评价研究.结果 所建方法能良好分离MA和AMP,结合判断依据能准确定性;MA在1.4～270 μg/mL浓度范围内线性关系良好,R2=1,日内标准偏差(RSD)与日间RSD均＜2.4%,检出限为0.73 μg/mL,平均加样回收率为102.5%;AMP在0.9～580 μg/mL浓度范围内线性关系良好,R2=0.9999,日内RSD与日间RSD均＜2.3%,检出限为0.52 μg/mL,平均加样回收率为101.7%.结论 此方法简便、快速、准确,适用于MA与AMP的检测.

Detecting Methamphetamine and Amphetamine with High Performance Liquid Chromatography

OBJECTIVE: To establish a method for detecting methamphetamine (MA) and amphetamine (AMP) with high performance liquid chromatography (HPLC). METHODS: Both MA and AMP were isolated on a C18 column and methanol-phosphate buffer (0.015 mol/L NaH2PO4) at a flow rate of 1.0 mL/min. The 190-360 nm ultraviolet spectrum was examined, with 215 nm as the detection wavelength. RESULTS: The MA and AMP were well isolated and determined. The MA determined by the HPLC had good linearity with the real value at the range from 1.4 to 270 microg/mL (R2=1), with an average recovery rate of 102.5%. The detectable Limit was 0.73 microg/mL (S/N > or =3). The AMP determined by the HPLC had a good linearity with the real value at the range from 0.9 to 580 microg/mL (R2 = 0.9999), with an average recovery rate of 101.7%. The detectable limit was 0.52 microg/mL (S/N > or =3). Both intra-day and inter-day precisions expressed by relative standard deviations of the MA and AMP were less than 2.4%. CONCLUSION: This is a simple, rapid and accurate method for detecting methamphetamine and amphetamine.