SCHEDULED MAINTENANCE
NMR-based metabolomics strategies: plants, animals and humans
This Tutorial Review addresses the principal steps from the sample preparation, acquisition and processing of spectra, data analysis and biomarker discovery and methodologies used in NMR-based metabolomics applied for pointing to key metabolites of diseases.
Analysis of amino acids, proteins, carbohydrates and lipids in food by capillary electromigration methods: a review
We review the literature covering the evolution of amino acid, protein, lipid and carbohydrate analysis in food samples by electromigration techniques over the last 20 years.
Towards low-cost bioanalytical tools for sarcosine assays for cancer diagnostics
Sarcosine is an amino acid that has been listed as a new indicator for prostate cancer.
Molecularly imprinted polymer-coated paper as a substrate for highly sensitive analysis using paper spray mass spectrometry: quantification of metabolites in urine
Molecularly imprinted polymer-coated paper substrate was used for highly sensitive analysis using paper spray mass spectrometry.
Different sample preparation methods for the analysis of suspension fertilizers combining LIBS and liquid-to-solid matrix conversion: determination of essential and toxic elements
A novel calibration method was developed for the determination of macronutrients in suspension fertilizer samples by laser-induced breakdown spectroscopy (LIBS).
Calibration of the mobility scale in ion mobility spectrometry: the use of 2,4-lutidine as a chemical standard, the two-standard calibration method and the incorrect use of drift tube temperature for calibration
2,4-Lutidine is not a good IMS chemical standard because its K0 depends on temperature and moisture. Drift gas instead of drift tube temperature should be used to calculate K0.
Simultaneous determination of urea herbicides in water and soil samples based on second-order photoinduced fluorescence data
An eco-friendly method is developed for the simultaneous quantification of four urea-derivative herbicides in water and soil samples.
Direct chemical inspection of eye shadow and lipstick solid samples using laser-induced breakdown spectroscopy (LIBS) and chemometrics: proposition of classification models
This study proposes classification models focusing on the identification of contaminated (high concentration of Cd, Co, Cr and Ni) and non-contaminated eye shadow and lipstick samples.
Fast sequential determination of manganese and chromium in vegetable oil and biodiesel samples by high-resolution continuum source graphite furnace atomic absorption spectrometry
HR-CS GF AAS was used for the sequential determination of Mn and Cr in vegetable oil and biodiesel samples.
A rapid and non-invasive method for the classification of natural tannin extracts by near-infrared spectroscopy and PLS-DA
A green, fast and sensitive method using NIR and PLS-DA was developed for classification of commercial tannins according to their nature.
Qualitative analysis of designer drugs by paper spray ionisation mass spectrometry (PSI-MS)
The application of ambient ionization mass spectrometry such as paper spray ionisation (PSI) is a fast, powerful, and simple method to analyze designer drugs directly on the surface of blotters.
3D printing of microfluidic devices for paper-assisted direct spray ionization mass spectrometry
We describe the use of a RepRap 3D printer to fabricate microfluidic devices for direct spray ionization mass spectrometry assisted by paper tips.
Phosphorus quantification in fertilizers using laser induced breakdown spectroscopy (LIBS): a methodology of analysis to correct physical matrix effects
P analysis in fertilizers using LIBS.
Colorimetric determination of nitrite in clinical, food and environmental samples using microfluidic devices stamped in paper platforms
Paper microfluidic devices were explored to perform the colorimetric determination of nitrite in saliva, sausage, ham, preservative water and river water samples with no statistical difference from a reference method.
Chemical identification of cannabinoids in street marijuana samples using electrospray ionization FT-ICR mass spectrometry
The Cannabis sativa L. plant is a species rich in a variety of cannabinoid compounds and Δ9-tetrahydrocannabinol (Δ9-THC) has been reported as a main psychotropic substance.
Electrochemical evaluation of a boron-doped diamond electrode for simultaneous determination of an antihypertensive ternary mixture of amlodipine, hydrochlorothiazide and valsartan in pharmaceuticals
The simultaneous voltammetric determination of amlodipine, hydrochlorothiazide and valsartan using a boron-doped diamond electrode is reported for the first time.
Separation of asparagine, valine and tetraethylammonium ions overlapping in an ion mobility spectrum by clustering with methanol introduced as a modifier into the buffer gas
We introduced methanol into the buffer gas of an ion mobility spectrometer-mass spectrometer and mobilities changed depending on ion structures; baseline separation of valine, asparagine, and tetraalkylammonium ions was achieved.
Capabilities of several phosphonium ionic liquids for arsenic species determination in water by liquid–liquid microextraction and electrothermal atomic absorption spectrometry
Different phosphonium ionic liquids have been assayed for liquid–liquid microextraction of As species.
Matrix solid-phase dispersion: a simple and fast technique for the determination of phenolic compounds in olive oil by liquid chromatography
MSPD-HPLC-MWD for phenolic compound determination in olive oil was developed. It is simple and requires little sample preparation, thus increasing the throughput.
Determination of P, S and Si in biodiesel, diesel and lubricating oil using ICP-MS/MS
The feasibility of inductively coupled plasma tandem mass spectrometry (ICP-MS/MS) to overcome polyatomic interferents in severely affected isotope determination is demonstrated here.
Explosive colorimetric discrimination using a smartphone, paper device and chemometrical approach
In this report we introduce a novel approach for an inexpensive and disposable colorimetric paper sensor array for the detection and discrimination of five explosives – triacetone triperoxide, hexamethylene triperoxide diamine, 4-amino-2-nitrophenol, nitrobenzene, and picric acid.
Dynamic solid-phase RNA extraction from a biological sample in a polyester-toner based microchip
High-quality pure RNA from dengue virus was obtained from serum using a dynamic solid phase extraction procedure on a polyester-toner microchip.
A novel strategy to determine As, Cr, Hg and V in drinking water by ICP-MS/MS
Trace element determination exploiting MS/MS mode and reaction with oxygen gas.
About this collection
This retrospective collection of articles from Analytical Methods showcases some of the best research from South American institutes in the field of analytical chemistry.