Sorption Characteristics and Chromatographic Separation of Y from Sr from Aqueous Media by Chelex-100 (Anion Ion Exchange) Packed Column.

There is growing demand for separation of Y carrier free from Sr coexisting to produce high purity Y essential for radiopharmaceutical uses. Thus, in this context the sorption profiles of Y and Sr from aqueous solutions containing diethylenetriaminepenta acetic acid (DTPA), ethylenediaminetetra-acetic acid (EDTA), acetic acid, citric acid, or NaCl onto Chelex-100 (anion ion exchange) solid sorbent were critically studied for developing an efficient and low-cost methodology for selective separation of Y from Sr ions (1.0 × 10 M).

An Eco-Friendly, Interference, and Solvent Free Surfactant-Assisted Dual-Wavelength -CorrectionSpectrometric Method for Total Determination and Speciation of Cu Ions in Water.

Spectral interference through the presence of uninformative variables, excess reagents, and complications in the refinement of the analyte signal is common in the quest to identify complex species in real samples. Therefore, an economical green, facile, and sensitive strategy has been developed for Cu detection using the anionic surfactant sodium dodecylsulphate- (SDS-) assisted dual-wavelength -correction spectrophotometric strategy combined with the chromogenic reagent zincon (ZI). The low limits of detection (LOD) and quantification (LOQ) of Cu using ordinary (single wavelength) spectrophotometry were 0.

A Highly Sensitive Modified Glassy Carbon Electrode with a Carboxylated Multi-walled Carbon Nanotubes/Nafion Nano Composite for Voltammetric Sensing of Dianabol in Biological Fluid.

The extraordinary prerequisite for the analysis of an anabolic steroid, namely dianabol (DB), has inspired towards the development of a cost-effective and high-performance sensing probe. Thus, a simple and robust electrochemical sensor (c-MWCNTs-NafionlGCE) for dianabol (DB), a widely used steroid, was developed using a glassy carbon electrode (GCE) modified with functionalized carboxylated multi-walled carbon nanotubes (c-MWCNT) and Nafion. At pH 7 - 8, differential pulse-cathodic stripping voltammetry (DP-CSV) displayed two cathodic peaks at -0.

An Ultrasensitive Detection Platform for Mercury Ions Speciation in Water Using Procaine Hydrochloride Ion Pair Coupled Extractive Spectrofluorimetry.

A simple extractive spectrofluorimetric strategy for trace determination of mercury(II) ions in water employing procaine hydrochloride (PQ) as an ion pairing fluorescent tagging reagent has been established. The method was based upon the extraction of PQ from aqueous iodide media onto dichloromethane as a ternary complex ion associate [(PQ).(HgI)] at pH 9.

Pipette-tip selective extraction of glycoproteins with lectin modified gold nano-particles on a polymer monolithic phase.

The in situ preparation of ethylene dimethacrylate porous polymer monoliths within 20 μL polypropylene pipette tips, bound via surface grafted methacrylate anchor sites, is reported. Gold nano-particles (AuNPs) were immobilised onto the monolith pore surface utilising azlactone chemistry and coverage verified using field emission scanning electron microscopy. Erythrina cristagalli lectin (ECL) was immobilised upon the attached AuNPs via a bio-functional linker.

Liquid chromatographic profiling of monosaccharide concentrations in complex cell-culture media and fermentation broths.

A solid phase extraction, liquid chromatography and fluorescence (SPE-RPLC-FL) based protocol for the determination of free monosaccharides in highly complex raw material powders and formulated fermentation feedstocks and broths has been developed. Monosaccharides within sample extracts were derivatised pre-column with anthranilic acid and the derivatives separated using reversed-phase LC with fluorescence detection. Using a 2.

Development of a rapid and sensitive method for determination of cysteine/cystine ratio in chemically defined media.

Two rapid, sensitive and quantitative methods for the determination of the cysteine and cystine ratio in complex defined media feedstock using monolithic reversed-phase liquid chromatography (RPLC) and RPLC-MS are presented. Cysteine is pre-derivatised with purified 2-chloro-1-methylquinolinium tetrafluoroborate (CMQT) and separated from other derivatisation products on a narrow-bore 50mmx2mm I.D.