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  • 1995-1999  (4)
  • 1970-1974
  • Column liquid chromatography  (2)
  • Numerical Methods and Modeling  (2)
Datenquelle
Materialart
Erscheinungszeitraum
  • 1995-1999  (4)
  • 1970-1974
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): Column liquid chromatography ; Benzalkonium chloride ; Tramadol ; Ophthalmic solution
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02272164
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): Column liquid chromatography ; Stability-indicating method ; 17β-Estradiol-3-phosphate ; Ophthalmic solutions
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02272172
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    The method of fundamental solutions and quasi-Monte-Carlo method for diffusion equations (1998)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 43 (1998), S. 1421-1435 
    Details
    ISSN: 0029-5981
    Schlagwort(e): method of fundamental solutions ; particular solution ; diffusion equations ; quasi-Monte-Carlo method ; Laplace transform ; Engineering ; Numerical Methods and Modeling
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Mathematik , Technik allgemein
    Notizen: The Laplace transform is applied to remove the time-dependent variable in the diffusion equation. For non-harmonic initial conditions this gives rise to a non-homogeneous modified Helmholtz equation which we solve by the method of fundamental solutions. To do this a particular solution must be obtained which we find through a method suggested by Atkinson. To avoid costly Gaussian quadratures, we approximate the particular solution using quasi-Monte-Carlo integration which has the advantage of ignoring the singularity in the integrand. The approximate transformed solution is then inverted numerically using Stehfest's algorithm. Two numerical examples are given to illustrate the simplicity and effectiveness of our approach to solving diffusion equations in 2-D and 3-D. © 1998 John Wiley & Sons, Ltd.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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    Artikel (Nationallizenzen)
  • 4
    Digitale Medien
    Digitale Medien
    A numerical method for heat transfer problems using collocation and radial basis functions (1998)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 42 (1998), S. 1263-1278 
    Details
    ISSN: 0029-5981
    Schlagwort(e): heat transfer ; collocation ; radial basis functions ; random points ; Engineering ; Numerical Methods and Modeling
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Mathematik , Technik allgemein
    Notizen: Simple, mesh/grid free, numerical schemes for the solution of heat transfer problems are developed and validated. Unlike the mesh or grid-based methods, these schemes use well-distributed quasi-random collocation points and approximate the solution using radial basis functions. The schemes work in a similar fashion as finite differences but with random points instead of a regular grid system. This allows the computation of problems with complex-shaped boundaries in higher dimensions with no extra difficulty. © 1998 John Wiley & Sons, Ltd.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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