[Separation and identification of Fischer-Tropsch wax by high temperature gas chromatography-mass spectrometry].

Fischer-Tropsch (FT) wax is an important material produced from FT synthesis reactions. In this study, an improved separation and identification method for FT wax by high temperature gas chromatography (HTGC) coupled with cold-on-column (without pretreatment) was developed. In our improved separation procedure, the carrier gas was changed to helium and a long chromatographic column was adapted for use at high temperature.

[Preparation and adsorption characteristics of surface-imprinted polymer using bovine serum albumin and lysozyme as double template proteins].

The double template surface-imprinted polymer (Bi-MIP)) was synthesized by atom transfer radical polymerization (ATRP) in aqueous media, using bovine serum albumin (BSA) and lysozyme (Lyz) as the template prteis, X-isopropylacrylamide (NIPAAm) and acrylamide (AAm) as the monomers and X-3-(dimethylamino) propyl-methacrylamide (DMAPMA) as the assistant of basic functional monomner. The ATHP possessed the mild reaction conditions and can be initiated at room temperature without heating and ultraviolet radiations. The preparation conditions of imprinted polymer were optimized, and the content of DMAPMA as the assistant of basic functional monomer was investigated.

[Determination of low-carbon alcohols, aldehydes and ketones in aqueous products of Fischer-Tropsch synthesis by gas chromatography].

A method for the determination of low-carbon (C1-C8) alcohols, aldehydes and ketones in aqueous products of Fischer-Tropsch synthesis was developed by gas chromatography. It included the optimization of separation conditions, the precision and accuracy of determination, and the use of correction factors of the analytes to ethanol for quantification. The aqueous products showed that the correlation coefficients for ethanol in different content ranges were above 0.

Ionic liquid-assisted SDS-PAGE to improve human serum protein separation.

Ionic liquid (IL)-assisted sodium dodecyl sulfate polyacrylamide gel electrophoresis (ILs-SDS-PAGE) was presented to improve protein separation. ILs were employed during the preparation process of polyacrylamide gel, then the modified gel was used for commercial protein marker, binary bovine serum albumin/lysozyme (BSA/Lyz) and human serum separation. The influence of ionic liquid concentration, cation alkyl chain length, cation and anion types on proteins separation were investigated.

Integration of carboxyl modified magnetic particles and aqueous two-phase extraction for selective separation of proteins.

Both of the magnetic particle adsorption and aqueous two-phase extraction (ATPE) were simple, fast and low-cost method for protein separation. Selective proteins adsorption by carboxyl modified magnetic particles was investigated according to protein isoelectric point, solution pH and ionic strength. Aqueous two-phase system of PEG/sulphate exhibited selective separation and extraction for proteins before and after magnetic adsorption.

The preparation of bovine serum albumin surface-imprinted superparamagnetic polymer with the assistance of basic functional monomer and its application for protein separation.

Currently, small proteins imprinting are more reported since large proteins molecular imprinting faces challenge due to their bulk size and complex structure. In this work, bovine serum albumin (BSA) surface-imprinted magnetic polymer was successfully synthesized based on atomic transfer radical polymerization (ATRP) method in the presence of common monomer (N-isopropylacrylamide) with the assistant of basic functional monomer (N-[3-(dimethylamino)propyl]-methacrylamide), which provides a achievable attempt for imprinting larger target proteins based on the ATPR with the mild reaction conditions. The BSA-imprinted polymer exhibited higher adsorption capacity and selectivity to BSA over the non-imprinted polymer.

Superparamagnetic lysozyme surface-imprinted polymer prepared by atom transfer radical polymerization and its application for protein separation.

Molecular imprinting as a promising and facile separation technique has received much attention because of their high selectivity for target molecules. In this study, the superparamagnetic lysozyme surface-imprinted polymer was prepared by a novel fabricating protocol, the grafting of the imprinted polymer on magnetic particles in aqueous media was done by atom transfer radical polymerization (ATRP), and the properties of the imprinted polymer were characterized in detail. Its high selective adsorption and recognition to lysozyme demonstrated the separation ability of the magnetic imprinted material to template molecule, and it has been used for quick and direct separation of lysozyme from the mixture of standard proteins and real egg white samples under an external magnetic field.