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  • 1
    Electronic Resource
    Electronic Resource
    A stability-indicating HPLC method for the determination of benzalkonium chloride in 0.5% tramadol ophthalmic solution (1995)
    Springer
    Chromatographia 40 (1995), S. 155-158 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Benzalkonium chloride ; Tramadol ; Ophthalmic solution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A high-performance liquid chromatographic procedure employing ultraviolet detection for the analysis of benzalkonium chloride in 0.5% Tramadol ophthalmic solution is reported. The method requires minimal sample pretreatment and is sensitive, accurate, and reproducible. The peak area versus BAK concentration is linear over the range of 50–150% of its label claim of 0.05 mg/mL. The mean absolute recovery of BAK using the described method is 100.2±1.2%, (mean ±SD, n=10). A stress study with heat, acid, base and UV radiation indicates that the method is stabilityindicating with no interference from drug or degradation products.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02272164
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A stability-indicating HPLC method for the determination of 17β-estradiol-3-phosphate in an ophthalmic solution (1995)
    Springer
    Chromatographia 40 (1995), S. 204-206 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Stability-indicating method ; 17β-Estradiol-3-phosphate ; Ophthalmic solutions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A reversed-phase high-performance liquid chromatographic (HPLC) procedure using ultra-violet (UV) detection for the analysis of 17β-estradiol-3-phosphate in an ophthalmic solution is reported. The method is selective, accurate, and reproducible. The peak area versus 17β-estradiol-3-phosphate concentration is linear over the range of 50–150% of its label claim of 1.0 mg/mL, with a detection limit of 20 ng/mL. The mean absolute recovery of 17β-estradiol-3-phosphate using the described method is 99.8±0.6% (mean ±SD, n=10). A stress study with heat, acid, base and UV radiation indicates that the method is stability-indicating with no interference from excipients or degradation products.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02272172
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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