Complexation reactions of dithiocarbamates.

The Chemistry of the Dithioacid and 1,1‐Dithiolate Complexes

The pesticide residues in foods have received increasing attention as one of the most important food safety issues. Therefore, more strict regulations on the maximum residue limits (MRLs) for pesticides in foods have been established in many countries and health organizations, based on the sensitive and reliable analysis methods of pesticide residues. However, the analysis of pesticide residues is a continuing challenge mainly because of the small quantities of analytes as well as the large amounts of interfering substances which can be co-extracted with them, often leading to experimental errors and damage to the analytical instruments. Thus, extensive sample preparation is often required for the pesticide residue analysis for the effective extraction of the analytes and removal of the interferences. This paper focuses on reviewing the recent development in the sample preparation methods for the pesticide residue analysis in foods since 2006. The methods include: liquid-liquid extraction (LLE), supercritical-fluid extraction (SFE), pressurized-liquid extraction (PLE), microwave-assisted extraction (MAE), ultrasound-assisted extraction (UAE), gel permeation chromatography (GPC), solid-phase extraction (SPE), molecularly imprinted polymers (MIPs), matrix solid-phase dispersion (MSPD), solid-phase micro-extraction (SPME), QuEChERS, cloud point extraction (CPE) and liquid phase micro-extraction (LPME), etc. Particularly their advantages, disadvantages and future perspectives will be discussed.

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A review of sample preparation methods for the pesticide residue analysis in foods

Development of nanoscale zirconium molybdate embedded anion exchange resin for selective removal of phosphate.

Identification and chemical characterization of specific organic constituents of petrochemical effluents.

A heterometric micro-determination of lead with sodium diethyldithiocarbamate

Microheterometric titrations of large organic nitrogen-containing compounds and of heteropoly acids

The heterometric determination of platinum,palladium and gold by titration with phenanthroline

Photometric measurements of iron oxalates

A quick and precise heterometric microdetermination of traces of palladium in metals with nitron

Mordechai (Max) Bobtelsky

Papers

A heterometric micro-determination of lead with sodium diethyldithiocarbamate

Microheterometric titrations of large organic nitrogen-containing compounds and of heteropoly acids

The heterometric determination of platinum,palladium and gold by titration with phenanthroline

Photometric measurements of iron oxalates

A quick and precise heterometric microdetermination of traces of palladium in metals with nitron