Column- and gel-chromatography have been used to study the phenylglycidyl ether (PGE) oligomers produced in the presence of dimethylbenzylamine with or without alcohol as additive. The oligomers have been found to possess a trimodal terminal OH-group distribution and to contain also non-hydroxyl ...
Column liquid chromatographyEnantiomeric separationChiral stationary phaseCyclodextrinDinitrophenyl etherThe comparisons of five different chiral stationary phases (CSPs) based on 2,6-dinitro-4-trifluoromethylphenyl (DNP-TFM) ether substituted β-cyclodextrin are presented. The five CSPs differ from each ...
for some time before isolation of the crystals. From the crystalline salt the free acid was isolated by extraction with ethyl acetate after acidification using dilute sulfuric acid. The enantiomeric ratio (S):(R) was determined by HPLC on a chiral column and the results are shown in Table 1...
Our results show that the CR-I (+)-column can be applied for the separation of endogenous DAACPs generated by the post-translational modification.Biochimica et Biophysica Acta (BBA) - Proteins and Proteomicsdoi:10.1016/j.bbapap.2020.140429Izuru Kawamura a b...
The relative proportion of rearrangement products is dependent on the temperature of the capillary column and the substituents on the phenyl ring.J. ZhaiW. YingFz ZhaoYz Chen中国化学快报(英文版)J.J.ZHAI. Detection of claisen rearrangement occurring in allyl phenyl ether by in situ GC/MS[J]....
The use of a reversed‐phase C18 column (250mm×4.0mm and 5m) using a gradient elution system enabled six compounds to be separated simultaneously in a single chromatographic run in less than 12 minutes. The method was successfully validated following ICH guidelines, and it has been demonstrated...
Non-linear plots of the logarithms of capacity factors versus the number of oxyethylene units in sulphated oligomers were observed on the bonded amino column in mobile phases consisting of cetyltrimethylammonium bromide, 2-propanol and n -heptane. It is possible to separate sulphated oligomers and...
The adducts formed between 2′-deoxyadenosine (dAdo), 2′-deoxycytidine (dCyd) and 2′-deoxyuridine (dUrd) and phenyl glycidyl ether (PGE) were analysed by HPLC and LC—thermospray (TSP)-MS. Good results were obtained on a 10 RP Select B column (12.5 cm × 4 mm I.D.) using 0.1 ...