RESUMO
<p><b>OBJECTIVE</b>To develop a method for the determination of salvianolic acid B and paeoniflorin in Shuangdan granules.</p><p><b>METHOD</b>The chromatographic separation was performed on a Zorbax SB C18 column with a linear gradient elution of phosphoric acid-water (0.05:100) and phosphoric acid-acetonitrile-methanol (0.05:4:96) was used. The flow rate was 1 mL x min(-1) and column temperature was set at 25 degrees C. The UV detection wavelength was set at 230 nm.</p><p><b>RESULT</b>The linear ranger was of 0.710-22.7 microg for salvianolic acid B and 0.103-3.30 microg for paeoniflorin. Three batches of Shuangdan granules were analyzed, and the content of salvianolic acid B ranged from 6.46-11.6 mg x g(-1) and paeoniflorin ranged from 1.44-1.78 mg x g(-1).</p><p><b>CONCLUSION</b>The method was accurate, reproducible, reliable, and could be used for quantitative control of Shuangdan granules.</p>