Green analytical chemistry

Ebook "Analytical chemistry applied to emerging pollutants" addresses the highly relevant subject of emerging pollutants, which are especially alarming since most of the available treatment technologies are unable to degrade them. It discusses the sources of these pollutants and their fate in the environment, and the main tools available for their analysis. It also describes the representative environmental matrices (air, soil and water) and appropriate analytical methods for each matrix.

128p tracanhphuonghoa1007 22-04-2024 4 2   Download

Ebook "High pressure fluid technology for green food processing" of this book is to present the fundamentals of high pressure technologies from the perspective of mass transfer phenomena and thermodynamic considerations. Novel food applications are exposed and their relation to chemical analysis, extraction, reaction and particle formation processes are outlined. The chapters are written by a diverse group of scientists with expertise in chemistry, food processes, analytical chemistry, chemical engineering and chemical engineering thermodynamics, and biotechnology.

521p tudohanhtau1006 29-03-2024 4 1   Download

Sample preparation is the crucial and most challenging part of analytical chemistry for the speciation of environmental pollutants’ traces. Along with the development of the sample preparation methods, the ionic liquid-based microextraction technique plays an important role. Due to the unequivocally unique “green” characteristic of ionic liquids (ILs), they owe their tunable properties, such as highly selective and high reaction efficiency, reusability, and good thermal stability, to present advancements in the sample preparation process.

21p lyhuyenthu 31-01-2023 5 2   Download

While current trends in Green Analytical Chemistry aim at reducing or simplifying sample treatment, food usually comprises complex matrices where direct analysis is not possible in most cases. In this context, sample treatment plays a pivotal role. Biogenic amines are naturally formed in many foodstuffs due to the action of microorganisms, while their presence has been associated with adverse health effects.

7p viginny 23-12-2022 7 3   Download

Magnetic nanoparticles of Fe3O4 coated with polyaniline have been synthesised through chemical coprecipitation, and successfully characterised using different techniques such as FT-IR and X-ray diffraction. Such nanocomposite was applied as sorbent for a new magnetic micro-dispersive solid phase extraction procedure for the extraction of seven plastic migrants in jelly samples.

10p viginny 23-12-2022 4 3   Download

Eosin-Y exhibits high affinity and emission based spectral response to most of the major ions in water samples. In the present study we performed selective spectrofluorimetric analysis of manganese with eosin-Y in the presence of potential interferents. We employed green chemistry reagents, ionic liquids (ILs) and two different micelles, to suppress the effect of conventional cations and anions on the response of eosin-Y. The experimental data revealed that different test moieties caused enhanced analytical response to Mn2+.

12p langthannam 29-12-2021 16 0   Download

Liquid-phase microextraction (LPME) methods including single-drop microextraction (SDME), hollow-fiber LPME (HF-LPME), and dispersive liquid-liquid microextraction (DLLME) have in the very short time since their invention grabbed the attention of scientists. Up to now, LPME methods have shown important innovations for the extraction and preconcentration of both inorganic and organic trace analytes from different matrices.

26p langthannam 29-12-2021 7 0   Download

A novel method for the determination of mercury(II) is suggested. The procedure is based on the formation of an ion associate between the bromide complex of Hg(II) and Astrazon Red 6B dye and vortex-assisted liquid–liquid microextraction of the ion associate formed, with subsequent spectrophotometric detection. The variables that affect the procedure, such as pH, the concentration of ligand and dye, the type and volume of extraction solvent, and the rate and time of vortex mixing, were optimized.

9p langthannam 29-12-2021 6 0   Download

In the current study, a simple and efficient analytical method for preconcentration and determination of Cd(II), Pb(II), and Sn(II) in some cosmetic samples, using ultrasonic assisted-cloud point extraction and flame atomic absorption spectrometry, was developed. The method is based on the ternary complex formations of Sn(II), Pb(II), and Cd(II), which are available in the form of neutral and/or anionic hydroxo complexes (Sn(OH)−3, Pb(OH)−3, Cd(OH)2, and/or Cd(OH)−3), with Victoria Pure Blue BO (VPB +) in the presence of cetylpyridinium chloride at pH 8.

14p langthannam 29-12-2021 8 0   Download

This study was conducted to develop fast and cost effective methods for the determination of caffeine in green coffee beans. In the present work direct determination of caffeine in aqueous solution of green coffee bean was performed using FT-IR-ATR and fluorescence spectrophotometry.

9p vijiraiya2711 27-05-2020 8 0   Download

This book is part of the Green Chemistry series published by the Royal Society of Chemistry, and is designed to provide a modern overview of the current status of insecticides. We present the current approaches for insect pest control as green alternatives to classical agrochemicals, which should be of interest to a vast group of researchers: agrochemists, biochemists, chemists, toxicologists, etc. Throughout the book, the different approaches to pest control which involve ‘‘greener chemicals’’ in particular are emphasized.

152p banhkem0908 24-11-2012 56 12   Download