HPLC determination of chlorhexidine gluconate and p-chloroaniline in topical ointment.
A novel fast isocratic reversed-phase HPLC method for simultaneous determination of chlorhexidine and its degradation product p-chloroaniline was developed. Zorbax SB Phenyl column (75 mm x 4.6 mm, 3.5 microm) was used for the separation. Mobile phase composed of acetonitrile and buffer solution of 0.08 M sodium phosphate monobasic containing 5 ml of triethylamine (0.5%) and adjust with 85% phosphoric acid to pH 3.0 in ratio 35:65 (v/v) pumped isocratically at flow rate 0.6 ml min(-1) was used. UV detection was performed at 239 nm, the total analysis time was about 10 min. The method is suitable for practical routine analysis of topical ointment in the quality control laboratory.
Havlíková
L
L
Department of Analytical Chemistry, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic.
Matysová
L
L
Nováková
L
L
Hájková
R
R
Solich
P
P
D000097:Acetonitriles; D000287:Administration, Topical; D000814:Aniline Compounds / Q000032:analysis*; D002021:Buffers; D002710:Chlorhexidine / Q000031:analogs & derivatives* / Q000032:analysis; D002851:Chromatography, High Pressure Liquid; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D009824:Ointments / Q000032:analysis; D011786:Quality Control; D012015:Reference Standards; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet; D019155:Veterinary Drugs
D000097:Acetonitriles; D000814:Aniline Compounds; D002021:Buffers; D007202:Indicators and Reagents; D009824:Ointments; D019155:Veterinary Drugs; C010882:chlorhexidine gluconate; D002710:Chlorhexidine; C032159:acetonitrile; C004658:4-chloroaniline