Solid-Phase Extraction (SPE)

An examination of how greening analytical methods is directly connected to greening the sample preparation step

ExTech is the largest conference dedicated to extraction technology, a field within separation chemistry that has seen remarkable growth over the past three decades.

An overview of different approaches for the qualitative and quantitative analysis of polysorbates.

Plant growth regulators (PGRs) have significant effects on plant physiological processes, but the complex matrices of plants, along with polarity and instability issues inherent with PGRs, complicate trace analysis of these compounds.

Bjorn Berendsen of Wageningen University & Research said at NACRW 2023 that among more than 6,000 suspected per- and polyfluoroalkyl substances (PFAS), detailed information is known about relatively few.

A water-resistant, highly adsorptive molecularly imprinted polymer was developed to address the issues of unstable adsorption performance and high organic solvent consumption in traditional materials.

A research team has developed a new method for the online measurement of tetraethyllead (TEL) in aqueous samples. The approach utilizes magnetism-enhanced in-tube solid phase microextraction (ME/IT-SPME) coupled with high performance liquid chromatography (HPLC) and diode array detection (DAD).

Quality control of raw hazelnuts is already a highly specific process, but has limitations including operator influence, duration, and lack of standardization. AI is now assisting in quality decision-making using GC×GC analysis.

A novel isotopologue was synthesized in a stable isotope dilution assay (SIDA) for quantification of γ-nonalactone for the first time in pinot noir wines from New Zealand.

Enhancements in chromatographic performance were reviewed as were experimental concerns, both pointing toward using specific solvents to influence more sustainable industrial development.

Gas chromatography coupled to mass spectrometry (GC–MS) has been the gold standard in this application, but its limitations in differentiating cancer subtypes have led to the exploration of newer related technologies.

Representatives of three subclasses of flavonoids were targeted for identification and quantitation in non-destructive single seed evaluation of Medicago sativa and Melilotus officinalis.

In a lecture at HPLC 2023, Valérie Pichon of ESPCI Paris and Sorbonne University said these advances address limitations of more traditional extraction techniques.

An ultrahigh-pressure liquid chromatography–tandem mass spectrometry method (UHPLC–MS/MS) using polarity switching, preceded by solid-phase extraction (SPE), was used to quantify eight ultraviolet filter (UVF) compounds in chlorinated outdoor pools in Winnipeg.

Samples of honey, chicken breast, and environmental water were analyzed for residue of nitroimidazoles, which are common antibiotics but can have detrimental effects on humans.

A new method for monitoring tricyclic antidepressants (TCA) in biological fluids and tissues in real time was proposed for the purposes of improving their effects or determining causes of death.

Extraction phase processes are well covered in literature, but lack of attention to the mechanism of these systems deprives researchers of information needed to evaluate their current and future use.

Researchers in Iran utilize graphene oxide aerogels to significantly improve the extraction and analysis of risperidone from plasma samples, offering enhanced accuracy and efficiency in pharmaceutical analysis.

Extraction of gasoline and its major aromatic groups was promising using a carbon nanotube-assisted solid-phase microextraction (CNT-SPME) fiber.

New MSPE-CE-DAD study indicates that efficiency remained above 75% even when a magnetic solid-phase extraction (MSPE) method was repeated five times, noting that the magnetic porous carbon (MPC) used in the extraction can be easily recycled.

Eighty drugs prohibited in athletic competition were analyzed, with seven samples returning adverse findings compared to previous methods.

A new method determines gas-polydimethylsiloxane (PDMS) distribution constants of key Cannabis terpenes and terpenoids, providing insights into their behavior and for optimizing SPME methods for analysis of these compounds.

This month we interview Juan L. Benedé from the University of Valencia in Spain, about his work developing microextraction approaches, based on the use of sorbent materials, for application to complex matrices, and his focus on the determination of disease biomarkers in biofluids.

A team of researchers from the University of Barcelona has developed a new method for the selective extraction of monosaccharide anhydrides from sediment samples, which is crucial for their analysis.

A solid-phase microextraction (SPME) Arrow combined with comprehensive two-dimensional gas chromatography coupled to mass spectrometry (GC×GC–MS) identified about 40 more volatile compounds in a variety of whiskeys compared to conventional SPME.

Scientists have developed a magnetic ionic liquid hypercrosslinked polymer composite for use in magnetic solid-phase extraction (MSPE) of non-steroidal anti-inflammatory drugs (NSAIDs), which was coupled with high-performance liquid chromatography (HPLC) for the detection of trace amounts of NSAIDs in water and urine samples.

Exploring the impact of green chemistry on analytical chemistry and GC is the focus of this instalment of "GC Connections".

This yearly report on new products introduced at Pittcon and in the preceding year covers sample preparation instruments, supplies, and accessories.

Direct-injection mass spectrometry (DIMS) and gas chromatography (GC) approaches have some significant differences that are pertinent when analyzing volatile organic compounds (VOCs). We explain.

Everyone is talking about sustainability, and organizations are creating sustainability programs. But what does green chemistry really mean, and how does it apply to gas chromatography?