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RECORD NUMBER: 5 OF 6

OLS Field Name OLS Field Data
Main Title Separation of T-MAZ Ethoxylated Sorbitan Fatty Acid Esters by Reverse Phase Chromatography.
Author Ye, M. Y. ; Walkup, R. G. ; Hill, K. D. ;
CORP Author ManTech Environmental Technology, Inc., Ada, OK.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher cMar 94
Year Published 1994
Report Number EPA-68-C8-0025 ;EPA-68-C3-0322; EPA/600/J-94/271;
Stock Number PB94-182359
Additional Subjects Chromatography ; Polymers ; Aliphatic acid esters ; Reprints ; Polyoxyethylene ; Separation ; Elution ; Molecular weight ; Chemical analysis ; Column packings ; T-MAZ ; Ethoxylated sorbitan fatty acid esters ; Reverse phase chromatography ; Oligomers ; Gel permeation chromatography
Holdings
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Status
NTIS  PB94-182359 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 09/01/1994
Collation 7p
Abstract
The method for determination of T-MAZ ethoxylated sorbitan fatty acid esters is described. The work demonstrates that with a less retentive C8 alkyl bonded phase packing, reverse phase chromatography can be used to analyze nonionic polymer mixtures with a molecular weight range of 900 to 1500. Using a gradient elution, a complete separation of T-MAZ eligomers was achieved, comparable to that obtained by Supercritical Fluid Chromatography (SFC). Isocratic elution is used to quantify T-MAZ and the detection limit is 321 ppm, which is acceptable for polymers with high molecular weights and no UV-absorbing chromophores. The work also shows the comparison of the separations of T-MAZ using gel permeation chromatography and reverse phase chromatography. (Copyright (c) 1994 Friedr. Vieweg & Sohn Verlagsgesellschaft mbH.)