以L-酒石酸正已酯-硼酸配合物为手性流动相添加剂,建立了普萘洛尔、艾司洛尔、美托洛尔、比索洛尔和索他洛尔5种β-受体阻滞剂的反栩高效液相色谱手性分离方法。对影响对映体分离的主要因素:L-酒石酸正己酯和硼酸的浓度,缓冲溶液的种类、浓度、pH值,有机改性剂甲醇的含鞋以及对映体分子结构等进行了详细考察。最佳色谱条件为:Venusil MP-C18色滑朴(250mm×4.6mm,5μm);流动相为15mmol/L乙酸铵-甲醇(体积比为20:80或30:70(索他洛尔)),含60mmol/L硼酸,70mmol/LL-酒石酸正己酯,乙酸调节pH值至6.00;检测波长214nm。在最佳分离条件下,5对对映体可以分别获得基线分离。
A reversed-phase high performance liquid chromatographic (HPLC) method using the di-n-hexyl L-tartrate-boric acid complex as a chiral mobile phase additive was developed for the enantioseparation of five fi-blockers including propranolol, esmolol, metoprolol, bisoprolol and sotalol. In order to obtain a better enantioseparation, the influences of concentrations of di-n-butyl L-tartrate and boric acid, the type, concentration and pH of the buffer, methanol content as well as the molecular structure of analytes were extensively investigated. The sepa-ration of the analytes was performed on a Venusil MP-C18 column (250 mm×4.6 ram, 5 μm). The mobile phase was 15 mmol/L ammonium acetate-methanol containing 60 mmol/L boric acid, 70 mmol/L di-n-hexyl L-tartrate ( pH 6.00 ). The volume ratios of 15 mmol/L ammonium acetate to methanol were 20:80 for propranolol, esmolol, metoprolol, bisoprolol and 30:70 for sotalol. The flow rate was 0. 5 mL/min and the detection wavelength was set at 214 nm. Under the optimized conditions, baseline enantioseparation was obtained separately for the five pairs of analytes.