JBCS

Medicine has been improving the assessment of health-related biomarkers towards precise diagnosis. In this context, we discuss how capillary electromigration techniques stand out as an alternative for the development of new high-efficient cost-effective diagnostic assays.

Two-dimensional liquid chromatography (2D-LC) for multiple applications.

A quantitative analysis method by gas chromatography-mass spectrometry (GC-MS) was developed using only a few standards and through the use of relative response factors (FRRIs) applied to compounds of the same family or similar. This method facilitates the quantitative (approximate) analysis of complex samples such as bio-oils. Samples of sawdust bio-oil, obtained at different catalyst/biomass ratios (CTB), were analyzed, being found a direct relationship between CTB and the concentration of phenols.

A biocompatible molecularly imprinted polymer chemically bound to the internal surface of a fused-silica capillary was synthesized by
in-situ polymerization. The molecularly imprinted coating exhibited selective sites for anandamide enrichment in plasma samples.

Solid phase extraction (SPE) and analytical columns based on C₁₈ polymer monoliths for the determination of urinary myoglobin by reversed-phase liquid chromatography.

Aluminized silica particles immersed in fluorinated polymer solution result in high-performance liquid chromatography (HPLC) stationary phase, after solvent evaporation at room temperature, with properties intimately related to the polymer characteristics.

Magnetic molecularly imprinted polymers (MIP) synthetized by semi-covalent imprinting approach for fast and selective cholesterol determination.

Alterations in the parameters of the extraction method favored some lipid subclasses of bromeliad leaves.

Polyvinyl alcohol (PVOH):pectin-based hydrogel disk cross-linked with citric acid, with application in solid phase extraction (SPE), for the extraction of parabens in urine samples, was studied.

Determination of biomarkers correlated with resistance and susceptibility to anthracnose in dwarf-cashew leaves.

In this work, a novel application of cork associated parallel disposable pipette extraction (DPX) procedure followed by high-performance liquid chromatography with diode array detection (HPLC-DAD) was used for the determination of hexanal and heptanal in human urine.

Synthesis and characterization of molecularly imprinted polymers (MIPs) for the determination of cocaine and its adulterants in urine.

A simple method for simultaneous determination of glyphosate, aminomethylphosphonic acid (AMPA) and inorganic anions in water samples by gradient capillary ion chromatography was successfully established, validated and applied to different water matrices.

Identification of similarities and possible unreported spill events by analysis of thirteen oil samples from the Pernambuco state coast using gas chromatography and mass spectrometry.

A new gas chromatography-mass spectrometry method that employs liquid-liquid extraction and a drying step assisted by a household microwave oven was proposed to determine simultaneously thirty-six pesticides in fresh coconut water samples.

An analytical method for the simultaneous determination of pesticides in soil samples using solid-liquid extraction (SLE)-liquid chromatography coupled with mass spectrometry in tandem (LC-MS/MS) was develop and validated.

Stress factors such as the temperature increase inside the colony could promote absconding in Apis mellifera. In this aspect, 9-ODA ((E)-9-oxodec-2-enoic acid) and 9-HDA ((E)-9-hydroxydec-2-enoic acid) levels could bring valuable information about this process for European carniolan and Africanized honeybees.

Evaluation of pesticide residues in processed tomato products.