Determination of two components in compound hydrocortisone nasal drops by new vierordt method

Key words: 
• new Vierordt method /
• hydrocorlisone acetate /
• chlorphenamine maleate

Abstract: Objective To determinate two components of hydrocortisone acetate and chlorphenamine maleate in compound hydro-cortisone nasal drops.Methods The components were determinated directly by new Vierordt mothod without separation.The detection wavelengths were 242.5nm and 261.5nm.The blank reference was ethanol absolute.Results The result showed good linear relationship between the concentration and the peak area ratio of the two components.The respective correlation coefficients of hydrocortisone and chlorphenamine maleate were 0.9998 in the range of 1.7754μg/mL to 17.754μg/mL and 0.9997 in the range of 2.656μg/mL to 26.56μg/mL.Average recovery of hydrocortisone and chlorphenamine maleate were 99.6% with RSD 0.8% and 99.7% with RSD 0.6%,respectively.The result of multiplying a by β was less than 0.5.The ratios of A_261.5^a+b to βA_242.5^a+b, and A_242.5^a+b to αA_261.5^a+b were both more than 1.2.According to new Vierordt method, the result is acceptable.Conclusion The mothod is simple, rapid and repeat able.The interference of the two components on each other can be eliminated and the result is reliable.