ABSTRACT
Objective: To establish a GC method for the determination of resorcinol, borneol, glycerol and DMSO in compound fluocinonide tincture.Methods: The analysis was performed on an HP-INNOWax column (30.0 m×0.32 mm,0.25 μm).The inlet temperature was 280℃ and the detector temperature was 290℃.The split ratio was 10∶1.With nitrogen as the carrier gas, the flow rate was 2.0 ml·min-1.The temperature was as follows: the initial temperature was maintained at 100℃ for 5 min and raised to 240℃ at a rate of 20℃·min-1, and maintaining for 8 min.The flow rate of hydrogen, air and tail blows was 35, 350 and 25 ml·min-1, respectively.Chennai was used as the internal standard.Results: The concentrations of DMSO, resorcinol, borneol and glycerol were within the range of 99.20-793.60 μg·ml-1 (r=0.999 9), 507.25-4 058.00 μg·ml-1 ,respectively(r=0.999 9), 102.20-817.60 μg·ml-1 (r=1.000 0) and 316.20-2529.60 μg·ml-1 (r=1.000 0) with a good linear relationship.The average recovery was 98.58%, 98.34%, 98.19% and 102.29%, and RSDs were 3.80%, 3.93%, 2.87% and 3.65% (n=9), respectively.Conclusion: The method is simple, accurate and reliable, and can be used for the quality control of DMSO, resorcinol, borneol and glycerol in compound fluocinonide tincture.