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采用气相色谱法测定卡维地洛中残留溶剂甲醇、异丙醇、甲苯的含量。结果为：甲醇在 10～ 160μ g/ml的浓度范围内，回归方程为 Y=2.288X－ 0.0072 r=0.9998；异丙醇在 160～ 800μ g/ml的浓度范围内，回归方程为 Y=3.5465X＋ 0.0960 r=0.9997；甲苯在 30～ 160μ g/ml的浓度范围内，回归方程为 Y=9.1875X＋ 0.1174 r=1.0000。结果表明：以上各浓度范围，线性关系良好。本法简便易行，结果准确。
The contents of methanol, isopropanol and toluene in carvedilol were determined by gas chromatography. The results showed that the regression equation was Y = 2.288X-0.0072 r = 0.9998 for methanol in the concentration range of 10 ~ 160μg / ml; the regression equation was Y = 3.5465 for isopropanol in the concentration range of 160 ~ 800μg / ml X + 0.0960 r = 0.9997; The regression equation of toluene in the range of 30 ~ 160μg / ml was Y = 9.1875X + 0.1174 r = 1.0000. The results show that: the above concentration range, a good linear relationship. This method is simple and easy to use, the result is accurate.