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Themed collection Analytical Chemistry in South America

23 items
Paper

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.

Graphical abstract: A rapid and non-invasive method for the classification of natural tannin extracts by near-infrared spectroscopy and PLS-DA
From the themed collection: Analytical Chemistry in South America
Paper

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).

Graphical abstract: Different sample preparation methods for the analysis of suspension fertilizers combining LIBS and liquid-to-solid matrix conversion: determination of essential and toxic elements
From the themed collection: Analytical Chemistry in South America
Technical Note

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.

Graphical abstract: Dynamic solid-phase RNA extraction from a biological sample in a polyester-toner based microchip
From the themed collection: Analytical Chemistry in South America
Tutorial Review

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.

Graphical abstract: NMR-based metabolomics strategies: plants, animals and humans
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: Fast sequential determination of manganese and chromium in vegetable oil and biodiesel samples by high-resolution continuum source graphite furnace atomic absorption spectrometry
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: Matrix solid-phase dispersion: a simple and fast technique for the determination of phenolic compounds in olive oil by liquid chromatography
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: Molecularly imprinted polymer-coated paper as a substrate for highly sensitive analysis using paper spray mass spectrometry: quantification of metabolites in urine
From the themed collection: Analytical Chemistry in South America
Critical Review

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.

Graphical abstract: Analysis of amino acids, proteins, carbohydrates and lipids in food by capillary electromigration methods: a review
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: Phosphorus quantification in fertilizers using laser induced breakdown spectroscopy (LIBS): a methodology of analysis to correct physical matrix effects
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: Colorimetric determination of nitrite in clinical, food and environmental samples using microfluidic devices stamped in paper platforms
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: 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
From the themed collection: Analytical Chemistry in South America
Communication

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.

Graphical abstract: Towards low-cost bioanalytical tools for sarcosine assays for cancer diagnostics
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: Electrochemical evaluation of a boron-doped diamond electrode for simultaneous determination of an antihypertensive ternary mixture of amlodipine, hydrochlorothiazide and valsartan in pharmaceuticals
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: Explosive colorimetric discrimination using a smartphone, paper device and chemometrical approach
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: Qualitative analysis of designer drugs by paper spray ionisation mass spectrometry (PSI-MS)
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: Chemical identification of cannabinoids in street marijuana samples using electrospray ionization FT-ICR mass spectrometry
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: 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
From the themed collection: Analytical Chemistry in South America
Technical Note

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.

Graphical abstract: A novel strategy to determine As, Cr, Hg and V in drinking water by ICP-MS/MS
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: Simultaneous determination of urea herbicides in water and soil samples based on second-order photoinduced fluorescence data
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: 3D printing of microfluidic devices for paper-assisted direct spray ionization mass spectrometry
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: Capabilities of several phosphonium ionic liquids for arsenic species determination in water by liquid–liquid microextraction and electrothermal atomic absorption spectrometry
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: Direct chemical inspection of eye shadow and lipstick solid samples using laser-induced breakdown spectroscopy (LIBS) and chemometrics: proposition of classification models
From the themed collection: Analytical Chemistry in South America
Paper

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.

Graphical abstract: Determination of P, S and Si in biodiesel, diesel and lubricating oil using ICP-MS/MS
From the themed collection: Analytical Chemistry in South America
23 items

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.

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