RESUMEN
OBJECTIVE: To establish a method for the determination of nitrofurazone in nitrofurazone and zinc oxide liniment. METHODS: The content of nitrofurazone was determined by UV spectrophotometry. The solvent was water and the wavelength was 375nm. RESULTS: There was good linear relationship within the concentration range of 1.05～12.60?g?mL-1(r=0.999 8). The average recovery was 100.9%,RSD=0.07%. CONCLUSION: The method was sensitive, accurate, reliable, reproducible, and suitable for quality control of nitrofurazone in nitrofurazone and zinc oxide liniment.
RESUMEN
OBJECTIVE:To improve the old way of examining minimum loading capacity so as to facilitate its operation and make it meet the specific requirements of some special preparations further.METHODS:The minimum loading capacities of ulcer paste,crystal ointment and zinc oxide liniment were examined by specific gravity method,capacity substitution method and capacity addition method.RESULTS:Method for examining minimum loading capacity that failed to be examined before is available now.CONCLUSION:The improved method is reliable and easy to handle.