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  • Inorganic Chemistry  (4)
  • Column liquid chromatography  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Determination of the lipophilicity of some anti-hypoxia drugs: Comparison of TLC and HPLC methods (1993)
    Springer
    Chromatographia 35 (1993), S. 275-280 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Thin-layer chromatography ; Anti-hypoxia drugs ; Lipophilic character and retention
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The lipophilicity of 14 anti-hypoxia drugs has been determined by reversed phase thin-layer (RPTLC) and reversed phase high performance liquid chromatography (RPHPLC) in eluent systems containing different concentrations of acetonitrile and potassium dihydrogen phosphate. There was significant correlation between lipophilicity and the specific hydrophobic surface area of the drugs in RPTLC, indicating that the drugs behave as an homologous series of compounds. In RPTLC the concentration of buffer has a negligible effect on the retention of the drugs whereas in RPHPLC the buffer concentration influenced the retention. This discrepancy can be explained by the lower sensitivity of RPTLC. There was strong correlation between lipophilicity values determined by both methods, proving that both are suitable for the determination of molecular lipophilicity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02277509
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  • 2
    Electronic Resource
    Electronic Resource
    Method for determination of plasticizers in industrial emissions (1993)
    Springer
    Chromatographia 37 (1993), S. 47-50 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Solid phase extraction ; Phthalate esters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A simple method has been developed for the determination of dibutyl phthalate, di-(2-ethylhexyl) phthalate, diisodecyl phthalate, and di(2-ethylhexyl) adipate in industrial emissions. A cartridge packed with a modified silica gel is used as adsorbent and adsorbed compounds are eluted and analyzed by HPLC in normal and reversed phase system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02272187
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  • 3
    Electronic Resource
    Electronic Resource
    Beitrag zur Kenntnis der sauren Barium-diphosphateProfessor Paul Royen zum 60, Geburtstage am 17. Dezember 1964 gewidmet. (1964)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 334 (1964), S. 15-20 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The precipitation of diphosphate from solutions of secondary alkali diphosphates by means of Ba2+ yields the acid salt Ba7H2P8O28·6H2O. With increasing alkalinity of the solutions, the hydrogen ion content of the Ba salt precipitate decreases. Precipitation from Na4-diphosphate solutions yields the neutral Ba2P2O7·1,5 H2O. From X-ray investigations (no structural differences between the two precipitates being found) it in concluded that the “neutral” Ba diphosphate has a phase range from Ba:H = 2:0 to 7:2.
    Notes: Ba2+ bildet-im Unterschied zu vielen anderen zweiwertigen Metallen-bei der Fällung aus Lösungen sekundärer Diphosphate ein saures Diphosphat, Ba7H2P8O28·6H2O. Mit steigender Alkalität der Fällungslösung nimmt die Acidität der Ba-Verbindung ab. Das neutrale Na-Diphosphat entsteht nur bei der Fällung aus quaternären Diphosphat-Lösungen. Bemerkenswerterweise besteht kein struktureller Unterschied zwischen den sauren Verbindungen und dem quaternären Salz, was zu der Annahme führt, daß das quaternäre Ba-Diphosphat eine Phasenbreite zwischen Ba:H = 2:0 und 7:2 besitzt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19643340104
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  • 4
    Electronic Resource
    Electronic Resource
    Pseudochalkogenverbindungen. XI. Über einen neuen Typ pseudochalkogen-modifizierter PhosphateProfessor Kurt Issleib zum 60. Geburtstage gewidmet (1979)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 458 (1979), S. 177-182 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pseudochalcogeno Compounds. XI. On a New Type of Pseudochalcogeno-Modified PhosphatesThe preparation of pseudochalcogenophosphates of the general formulas [PO3Y]3- and [P2O7-nYn]4- (Y = C(CN)2, n = 1, 2) is described. Chromatography of sodium salts, the formation of silver and calcium salts, characteristic IR and 31P-NMR data are discussed.
    Notes: Es wird über die Synthese von Pseudochalkogenophosphaten der allgemeinen Formeln [PO3Y]3-, [P2O7-nYn]4- (Y = C(CN)2, n = 1, 2) berichtet. Chromatographisches Verhalten der Natriumsalze, Silber- und Calciumsalzbildung, charakteristische IR- und 31P-NMR-Daten werden diskutiert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19794580124
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  • 5
    Electronic Resource
    Electronic Resource
    Die Reaktionsfähigkeit α-und γ-ständiger Methylgruppen in Pyryliumsalzen. (Über Pyryliumverbindungen, XIII.) (1924)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 57 (1924), S. 1653-1656 
    Details
    ISSN: 0365-9631
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19240570904
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  • 6
    Electronic Resource
    Electronic Resource
    Die Konstitution der Methyldiphenyl-pyryliumsalze. (Über Pyrylium-Verbindungen, XII) (1923)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 56 (1923), S. 1012-1013 
    Details
    ISSN: 0365-9631
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19230560504
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