ABSTRACT
Objective To establish a method for the chiral separation and determination of S-isomer in epinephrine hydrochloride injection by HPLC with chiral mobile phase additives. Methods Column of Purospher? STAR RP-18 (4. 6 mm×250 mm, 5 μm) was used. The mobile phase was acetonitrile-10 mmol·L-1 sodium dihydrogen phosphate buffer containing 10 mmol·L-1 sulfobutylether-b-cyclodextrin (pH adjusted to 3. 0 with phosphoric acid) (98. 5:1. 5), detection wavelength was 280 nm, the flow rate was 0. 8 mL·min-1 , and the column temperature was 30 ℃ . Results Good linear relationship was established between the peak area and the concentration of S-isomer over the range of 5. 02-1501. 50 μg·mL-1 (R2 =0. 999 7). The detection limit was 0. 05 μg·mL-1 . Conclusion The proposed method shows high repeatability and durability. It can be employed for the quality control of S-isomer in epinephrine hydrochloride injection.
ABSTRACT
Objective:To establish a method for the simultaneous determination of chlorphenamine maleate and ephedrine hydro-chloride in chlorphenamine maleate and ephedrine nasal drops by HPLC. Methods:An HPLC method was performed on a column of Purospher STAR RP18(150 mm × 4. 6 mm,5 μm)with the mobile phase of acetonitrile -potassium dihydrogen phosphate buffer(pH 3. 0 ± 0. 1)(18:82 v/v)at the detection wavelength of 210 nm(adjusting the flow rate and column temperature to 1. 0 ml·min-1 and 35℃,respectively). The injection volume was 20 μl. Results:A good linear relationship was established between the peak response and the concentration of ephedrine hydrochloride and chlorphenamine maleate over the range of 19. 81-118. 85μg·ml-1(r=0. 999 6) and 6. 21-37. 25 μg·ml-1(r=0. 999 8),respectively. The mean recovery of ephedrine hydrochloride and chlorphenamine maleate was 100. 39%(RSD=0. 69%,n=9)and 100. 11%(RSD=0. 60%,n=9),respectively. Conclusion:The proposed method shows high repeatability,good durability and promising accuracy. It can be employed for the determination of two components in chlorphena-mine maleate and ephedrine nasal drops.
ABSTRACT
Based on the requirements of quality assurance during drug control process,a quality assurance system is developed for drug control in the institute of drug and equipment control.The results show that the method developed in this paper is much suitable tothe process of drug control and can be applied tocontrolling the quality from the drug receiving tothe drug releasing.The quality assurance system guarantees that the detected data are achieved scientifically and efficiently.