Determination of seven effective components in Yiqing Capsule simultaneously by RP-HPLC / 中成药

AIM: The multiple effective components in Yiqing Capsule(Radix et Rhizoma Rhei,Rhizoma Coptidis,Radix Scutellariae) were analyzed by RP-HPLC. METHODS: A column of Kromasil C_(18)(250 mm?4.6 mm,5 ?m)was used.The mobile phase was composed of A 0.5% triethylamine(pH3.0,containing 5 mmol/L SDS),B methanol and acetonitrile(50∶50) with gradient elution.The flow rate was 1.0 mL/min with the detection wavelength at 254 nm. RESULTS: In the linear range the correlation coefficients ranged from 0.999 4 to(0.999 9).The average recoveries were 95.2%-102.2% with corresponding RSD of 0.8%-2.0%,respectively. CONCLUSION: The method is rapid,accurate and reliable.It can be used to control the quality of Yiqing Capsule.