Column liquid chromatographyStationary phase regenerationOn-column endcappingReversed-phase modeOn-column endcapping and derivatization or regeneration of C 8 and C 18 reversed-phase HPLC columns with newly introduced reagents were studied. These treatments can increase column life expectancy by restoring ...
the impact of both the grafting position of the PDI and the nature of the end-capping moieties on photovoltaic and charge transport properties and will hopefully contribute in reconsidering conventional design principles and above all, the use of 1,6-difunctionalized isomer in some organic ...
Employing pure silica and a full end-capping procedure resulted in sharp peaks for basic and chelating compounds. To avoid the loss of column efficiency,... H Moriyama,M Anegayama,K Komiya,... - 《Journal of Chromatography A》 被引量: 53发表: 1995年 Combined supercritical fluid chromatograph...
ColumnTMSIHPLCFollowing a bonding reaction with octadecyldimethyl- N, N-diethylaminosilane (ODS-DEA), a monolithic silica was subjected to consequential on-line endcapping reactions with hexamethyldisilazane (HMDS) or N-(trimethylsilyl)imidazole (TMSI) to compare the two reagents. Endcapping of ...
Reactivity of the TMS donors studied may be ranked in the following order: TMSIM > TMSDMA > BSTFA > BSA > TMCS > TMSOP > HMDS. TMSIM appears to be the reagent of choice for end-capping of alkyl bonded HPLC phases.doi:10.1080/01483918808082260...
The extend Of BSA end-capping as measured by the increase in column efficiency (67,260 N/m vs. 60,480 N/m) on a 2.1 i.d. x 50 mm column, methylene group selectivity (alpha(CH2) = 2.27 vs. 2.14) and decreased silanophilic interactions (S=3.7 vs. 4.10) indicate that the ...