Extraction and quantification of pesticide residue from the okra matrix at or below established maximum limit (MRL) is a challenging task for both analytical chemists regulatory institutions to take corrective actions human health safety. develop simple rapid less expensive extraction cleanup method simultaneous analysis pyriproxyfen fenpropathrin in two methods: QuEChERS Liquid-Liquid (LLE) we...

Traditional Chinese medicines (TCMs) are usually complex mixtures and contain hundreds of chemically different constituents, which make the quality control (QC) of crude drugs and their medical preparations extremely difficult. In the past years, with the rapid development of modern instrumental analysis and computer-aided data processing techniques, great progress has been made in the research...

The study of organic matter in wastewater is a major regulatory and environmental issue requires new developments to identify non-biodegradable refractory compounds, produced mainly by thermal treatments. Recent advances linking physicochemical properties spectroscopic analyzes (UV, Fluorescence, IR) have shown that the property favored several parameters: weight, hydrophobicity, aromaticity ch...

The safety of food contact materials is a hot topic since chemicals can migrate from packaging into food, thus raising health concerns about and/or producing changes in the organoleptic properties foodstuffs. Migration tests are required to demonstrate compliance with current regulations and investigate transferred compounds. In this context, mass spectrometry analytical technique choice for de...

Current standards and regulations demand the pharmaceutical industry not only to produce highly pure drug substances, but to achieve a thorough understanding of the impurities accompanying their manufactured drug substances and products. These challenges have become important goals of process chemistry and have steadily stimulated the search of impurities after accelerated or forced degradation...

The reproducibility and accuracy of analysis methods has expanded rapidly over the past years. Hyphenated methods, for example, GC-MS and LC-MS/MS (liquid chromatography-mass spectrometry), are now almost routinely used for (semi-) quantitative analysis of tens to hundreds of metabolites in biological samples. It should be realized, however, that the quality of the applied analytical techniques...