Development of a multiresidue method for the determination of multiclass pesticides in soil using GC

Abstract

The principal objective of the present study was to develop a multiresidue analytical method for 62 pesticides in a soil matrix. Soil samples were fortified with known quantities of pesticides at two different concentration levels (0.1 and 0.01 microg/g) and the analytes were extracted via a liquid-solid extraction method. The pesticides were separated on an HP5 capillary column and were detected by gas chromatography coupled to an electron capture detector (GC-ECD). The method was validated, considering its good linearities (r(2) = 0.978-0.999), specificity and recovery characteristics. Recoveries were found between 70.3 and 113.4% for all pesticides except edifenphos (67.5%) and dichlobenil (69.5%) spiked at a 0.1 microg/mL concentration level and 74.5-117% except ethalfluralin (63.3%) and dichlobenil (51.9%) spiked at a concentration of 0.01 microg/mL. The developed method could be utilized as a simple and cost-effective method for the routine analysis of 62 pesticides in soil samples.

Development and validation of a multiresidue method for determination of 37 pesticides in soil using GC‐NPD

“…A cost-effective multiresidue analytical method for the determination of 62 pesticides in a soil matrix was developed using GC-ECD and reported earlier by our group (Park et al, 2010). In a continuation of that work, we are now reporting the validation of that method for the multiresidue analysis of 37 pesticides via GC-NPD.…”

“…Detailed extraction and clean-up procedures were described in our previous publication (Park et al, 2010). In brief, a fortified soil sample (50 g) was mixed with 0.2 M ammonium chloride solution (30 mL) and was permitted to stand for 10 min, followed by the addition of acetone (100 mL).…”

“…Increasing contamination of soil, water and sediment due to the intensive use of pesticides (Singh 2001;Ware and Whitacre, 2004) has led to the development of a multiresidue method for the analysis of a number of pesticides, using only common laboratory equipment and inexpensive reagents and solvents. We have recently developed and validated a method for the simultaneous determination of 62 commonly employed pesticides in soil matrices using GC-ECD (Park et al, 2010). Owing to differences in structures and characteristics, not all of the pesticides respond similarly to all types of detectors.…”

Fast and Quantitative Analysis of Ediphenphos Residue in Rice Using Surface‐Enhanced Raman Spectroscopy

“…And the accurate detection of ediphenphos residue in rice is crucial to prevent its adverse effects. Chromatographic methods, such as gas chromatography (GC) (Park et al., ) and liquid chromatography (Luzardo et al., ), are common techniques used for the accurate detection of ediphenphos. Nevertheless, chromatographic methods are inconvenient given their complicated and time‐consuming operation (Arvand & Mirroshandel, ; Kwon, Nguyen, Park, & Gu, ).…”

Use of SPME and Chemometrics in Method Development for Food and Environmental Analysis of Pesticide Residues

“…Sample pretreatment is a crucial step in chemical analysis, therefore the relevant methodology to achieve a safer, cheaper and more accurate determination must be considered [1]. Several methods such liquid-liquid extraction, pressurized liquid extraction, accelerated solvent extraction, microwave assisted solvent extraction, soxhlets extraction, supercritical fluid extraction, purge and trap, solid phase extraction and other methods have been reported in the literature on its applicability to determine trace pesticide residues [2][3][4][5] but most are found to be expensive, time-consuming, use of large volumes of toxic organic solvents [6,7], hence the need to find a method that will solve the above shortcomings.…”