UPLC同时测定桂枝中5种活性成分的含量

目的:建立UPLC同时测定桂枝中原儿茶酸、香豆素、肉桂醇、肉桂酸和桂皮醛的含量.方法:采用ACQUITY UPLC,HSS T3色谱柱(2.1mm×100 mm,1.8 μm),以乙腈-0.05％的磷酸水溶液为流动相,梯度洗脱,流速0.5 mL·min-1,检测波长254 nm,柱温30℃.结果:原儿茶酸、香豆素、肉桂醇、肉桂酸和桂皮醛分别在0.359～3.59 mg· L-1(r =0.9993),2.83 4～28.34 mg·L-1(r=0.9998),0.574～5.74 mg· L-1(r =0.9998),2.400 ～24.00 mg·L-1(r =0.9999),和32.57～325.7 mg·L-1(r =0.999 8)(n =6)有良好的线性关系;平均加样回收率(n=9)均在96.7％～101.0％,RSD均小于2.3％.结论:该方法快速、准确、重现性好,可作为测定桂枝中原儿茶酸、香豆素、肉桂醇、肉桂酸和桂皮醛含量的方法.

UPLC simultaneous determination of five active components in Cinnamomi Ramulus

A rapid UPLC method for simultaneous determination of protocatechuic acid, coumarin, cinnamic alcohol, cinnamic acid and cinnamaldehyde in Cinnamomi Ramulus was established. The optimal conditions of separation and detection were achieved on an HSS T3 Column (2.1 mm x 100 mm, 1.8 microm) eluted with a gradient of acetonitrile and 0.05% aqueous phosphoric acid, at a flow rate of 0.5 mL x min(-1), detected at 254 nm. The linear response ranges of protocatechuic acid, coumarin, cinnamic alcohol, cinnamic acid and cinnamaldehyde were 0.359-3.59 mg x L(-1) (r = 0. 999 3), 2. 834-28.34 mg x L(-1) (r = 0.999 8), 0.574-5.74 mg x L(-1) (r = 0.999 8), 2.400-24.00 mg x L(-1) (r = 0.999 9), 32.57-325.7 mg x L(-1) (r = 0.999 8), respectively (n = 6). The mean recoveries (n = 9) of the five components were 96.7%-101.0%, RSD < 2.3%. The assay demonstrates that the method has adequate accuracy and selectivity to measure the concentration of protocatechuic acid, coumarin, cinnamic alcohol, cinnamic acid and cinnamaldehyde in Cinnamomi Ramulus.