HPLC Determination of Mepiquat Chloride in Commercial Pesticide Formulations

Abstract

A simple, fast and precise High Performance Liquid Chromatographic method with diode array detector was developed and single laboratory validated for the determination of mepiquat chloride in soluble concentrate pesticide formulations. From the results obtained, the repeatability of the method expressed as relative standard deviation (%RSD) was found to be 0.3%, and the limit of detection was 0.02 microg/mL. The accuracy of the whole procedure estimated by the comparison of the results obtained with the reference values, and was found to be acceptable as t(cal) < t(crit). The precision of the method also considered acceptable as the experimental repeatability relative standard deviation (RSD(r)) was lower than the interlaboratory relative standard deviation (RSD(R)), calculated by the Horwitz equation.

Dissipation Study of Mepiquat Chloride and its Metabolites in Water at Different pH Levels

“…The secure use of the pesticide relies upon its toxicological properties and its distribution and persistence within the environment, along with consideration of any unusual photoproducts and metabolites that are probably formed 1 . Fallacious utilization of pesticides ends in environmental contamination 2 . There has been increased research interest aimed at understanding the process that controls the penetration of pesticides into the soil and their subsequent contamination of groundwater and surface water 3 .…”

Flow through potentiometric sensors based on molecularly imprinted polymers for selective monitoring of mepiquat residue, a quaternary ammonium herbicide

“…5 Monitoring the quality of formulations containing MQ as active ingredient shows special environmental and analytical interest mainly due to its physicochemical properties. Routine analysis of MQ in environmental, food and biological samples was carried out using analytical techniques such as high performance liquid chromatography (HPLC), mass spectrometry (MS), [5][6][7] HPLC-tandem electrospray-MS, 8,9 capillary electrophoresis (CE) with UV-Vis or laser-induced fluorescence detection, as well as with new hyphenated techniques like CE-electrospray ionization-MS 10 or ion chromatography with conductivity detection, 11,12 and FT-Raman spectroscopy. 13 These techniques generally have high sensitivity but are complex and costly, require skilled technicians and large laboratory based instrumentation.…”

Simultaneous determination of hexanoic acid 2-(diethylamino)ethyl ester and mepiquat chloride by ultra-performance liquid chromatography coupled to tandem mass spectrometry

“…Some analytical methods have been published on the determination of MQ residues in vegetables, fruits and other samples using ultra-performance liquid chromatography coupled with tandem mass spectrometry (UPLC-MS/MS) with octadecylsilane (C18) or ENVIÔ18 solid-phase extraction (SPE) cartridges. [10][11][12] However, a method for simultaneous determination of DA-6 and MQ residues in cotton and soil matrices has not been reported to date. Thanks to progress in chromatographic techniques, UPLC was developed using columns containing particles with a diameter of <2 mm, and is a powerful and unsurpassed analytical tool in terms of selectivity and confidence in qualitative response.…”