In proteomics, nanoflow multidimensional chromatography is now the gold standard for the separation of complex mixtures of peptides as generated by in-solution digestion of whole-cell lysates. Ideally, the different stationary phases used in multidimensional chromatography should provide orthogonal separation characteristics. For this reason, the combination of strong cation exchange chromatogr...

Ionic liquid-based dispersive liquid–liquid microextraction (IL– –DLLME) coupled with high performance liquid chromatography (HPLC) with UV detection was developed for the simultaneous extraction and determination of nickel, cobalt, copper and zinc ions. In the proposed approach, salophen (N,N'-bis(salicylidene)-1,2-phenylenediamine) was used as a chelating agent, the ionic liquid, 1-hexyl-3-me...

chamomile ( matricaria chamomilla l.) is a widely used medicinal plant possessing several pharmacological effects due to presence of active compounds. this study describes a method of using ultra performance liquid chromatography (uplc) coupled with photodiode array (pda) detector for the separation of phenolic compounds in m. chamomilla and its crude extracts. separation was conducted on c 18 ...

Abstract A method for rapid separation of americium from complex matrices by use two commercially available extraction chromatography resins is reported. TRU resin capable purifying americium/lanthanides together Group 1, 2 and transition metals. tolerated high loadings iron, aluminium, calcium sodium potassium. TEVA purified elution with ammonium thiocyanate. Decontamination factors > 20,00...

The application of liquid–liquid chromatography principles to solvent extraction processes in hydrometallurgy can greatly simplify rare earth metal separation technologies by separating multicomponent mixtures one technological operation. In this study, the chromatographic elements (REEs) multistage columns was experimentally studied under conditions impulse sample injection—single and multiple...

synthesis of zinc dialkyldithiophosphate (zddp) consists of two stages. in the first stage, phosphorus pentasulfide reacts with an alcohol to give dialkyldithiophosphoric acid. in the second stage, the acid is neutralized by zinc oxide. in addition  to the product, some impurities are also formed which affect the quality of the final product. if we can determine the chemical structure of these ...