Simultaneous determination of three herbicides in wheat, wheat straw, and soil using a quick, easy, cheap, effective, rugged, and safe method with ultra high performance liquid chromatography and tandem mass spectrometry

Abstract

In this study, a sensitive and effective analytical method for the extraction and detection of three herbicide residues (florasulam, fluroxypyr, and halauxifen-methyl) in wheat and soil was developed. Samples were extracted with acetonitrile/water followed by salting out, dispersive solid-phase extraction cleanup, and detection using ultra high performance liquid chromatography coupled with tandem mass spectrometry. The target analytes were detected within a 5 min runtime using an ultra high performance liquid chromatography high-strength silica trifunctional column connected to an electrospray ionization source in positive mode. The method was validated in five replicates at three fortification concentrations in each matrix. Adequate pesticide quantification and identity confirmation were attained, even at the lowest concentration levels. The method showed very good accuracy and precision. Good recoveries were observed for the three herbicides and mostly ranged between 75.8 and 114.6%, with intraday relative standard deviations <6.01% and interday relative standard deviations <4.02%. The limits of quantification ranged between 0.14 and 7.68 μg/kg for each herbicide. The method was successfully applied for the simultaneous analysis of the three herbicides in actual trial samples, and the results proved that the proposed method was effective in detecting these three herbicides.

Effect of soil fumigants on degradation of abamectin and their combination synergistic effect to root-knot nematode

“…The parent ion of ABM was 895.46 m/z and the quantification ion was 183.04 m/z, and the confirmatory ion was 327.09 m/z. The cone voltages and collision energies of the quantification ion and confirmatory ion were 2 V and 54 V, respectively [ 35 ].…”

Simultaneous determination of broflanilide and its metabolites in five typical Chinese soils by a modified quick, easy, cheap, effective, rugged, and safe method with ultra high performance liquid chromatography and tandem mass spectrometry

“…In this study, the Waters Acquity UPLC BEH C18 column (2.1 × 50 mm, 1.7 μm particle size) was first selected. In the positive ESI mode, the use of an acidic mobile phase is conducive to protonate the target compound and can improve the response and peak shape . Therefore, we compared water to 0.2% v/v FA aqueous solution for the aqueous phase, and found that the 0.2% v/v FA aqueous solution was better than water for improving response.…”

Development and validation of a multiresidue method for the simultaneous determination of organophosphorus insecticides and their toxic metabolites in sugarcane juice and refined sugar by gas chromatography with flame photometric detection

“…After the widespread acceptance and application of the QuEChERS method , acetonitrile has become largely used to extract pesticide residues from agricultural and environmental matrices . Acetonitrile was shown to be the most advantageous solvent for extraction of pesticide residues from food samples and ethyl acetate was reported to be the second best .…”