title: High-performance liquid chromatographic assay for the simultaneous determination of ipratropium bromide, fenoterol, salbutamol and terbutaline in nebulizer solution.
abstract: A reversed-phase ion-pair high-performance liquid chromatography assay was developed for the simultaneous determination of ipratropium bromide, fenoterol hydrobromide, salbutamol sulphate and terbutaline sulphate in nebulizer solution. Chromatographic separation was achieved with a Nova-Pak C18 4 microns 10 cm x 8 mm i.d. Radial-pak cartridge inside a Waters RCM 8 x 10 compression module using ternary gradient analysis. Detection was performed using UV detection at 220 nm. The standard curves were linear over the following ranges: ipratropium bromide 20.8-250.0 micrograms ml-1, fenoterol hydrobromide 27.8-500.0 micrograms ml-1, salbutamol sulphate 34.7-2500.0 micrograms ml-1 and terbutaline sulphate 69.5-2500 micrograms ml-1. Inter-day and intra-day relative standard deviations for each compound ranged from 4.5-5.2% and 3.5-3.9%, respectively. The assay procedure was developed to allow the accurate determination of constituents in various combinations of nebulizer solution, as well as for stability indicating purposes. This provides a convenient means of testing long-term compatibility and stability following the post-manufacture mixing of commonly used nebulized preparations.
authors.affiliation: Tasmanian School of Pharmacy, Faculty of Medicine and Pharmacy, University of Tasmania, Hobart, Australia.
authors.forename: G A
authors.initials: GA
authors.lastname: Jacobson
authors.forename: G M
authors.initials: GM
authors.lastname: Peterson
mesh_terms: D000420:Albuterol / Q000032:analysis*; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004355:Drug Stability; D005280:Fenoterol / Q000032:analysis*; D009241:Ipratropium / Q000032:analysis*; D015394:Molecular Structure; D009330:Nebulizers and Vaporizers; D012996:Solutions; D013726:Terbutaline / Q000032:analysis*
chemical_list: D012996:Solutions; D005280:Fenoterol; D009241:Ipratropium; D013726:Terbutaline; D000420:Albuterol