Microextraction by packed sorbent (MEPS) is a new miniaturized form of solid-phase
extraction and it is a green sample pretreatment technology. MEPS has been widely …

Recoveries of cobalt and lithium metals from spent lithium-ion batteries are very important
for prevention of environmental pollution and alleviation of resource shortage. In this study, a …

A carbon fiber ionization (CFI) technique was developed for the mass spectrometric analysis
of various organic compounds with different polarities. The design of the CFI technique was …

Normal phase liquid chromatography (NPLC) is widely applied in the analysis of lipids, plant
extracts, chiral molecules, and petroleum. NPLC alone is not powerful enough to handle the …

By the on-chip integration of a droplet generator in front of an emitter tip, droplets of non-
polar solvents are generated in a free jet of an aqueous matrix. When an IR laser irradiates …

Rationale In liquid chromatography/mass spectrometry (LC/MS) the LC flow is often split
prior to the mass spectrometer, for instance, when collecting fractions of the separated …

Automated post-column sample manipulation is undoubtedly one of the most challenging
approaches in liquid chromatography for the improvement of method selectivity and …

Rationale The direct detection of nonpolar and low‐polarity solvent extracts of herbal
medicine is difficult by conventional electrospray ionization mass spectrometry (ESI‐MS) …

The coupling of micro solid-phase extraction (μSPE) with mass spectrometry (MS) was
reported and coupled with a miniature mass spectrometer for the first time. μSPE is a …

Normal phase liquid chromatography (NPLC) is widely used for separating petroleum into
compound classes, such as polycyclic aromatic hydrocarbons (PAHs) and polar nitrogen …