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Juan Zhang et al.
Nature plants, 6(2), 67-72 (2020-02-06)
Use of growth retardants enables post-planting optimization of vegetative growth, which is particularly important given ongoing climate change. Mepiquat chloride is an economical and safe retardant widely applied in cotton farming, but it is not uniformly effective. Here, identification of
Lutz Alder et al.
Journal of AOAC International, 88(6), 1762-1776 (2006-03-11)
Interlaboratory validation studies have been performed on 2 methods for the determination of chlormequat (CLQ) and mepiquat (MPQ). Both methods used identical extraction procedures and stable isotope internal standardization but differed in the use of liquid chromatography/mass spectrometry (LC/MS) or
Yuan Yuan et al.
Journal of agricultural and food chemistry, 66(23), 5907-5912 (2018-05-23)
Carnitine is demonstrated as an effective methyl donor in the formation of the plant growth regulator N, N-dimethylpiperidinium (mepiquat), encompassing either N-methylation/decarboxylation of pipecolic acid, or Maillard pathways followed by transmethylation reactions. The formation of mepiquat and the intermediate compounds
Zhiyong Yu et al.
Analytica chimica acta, 678(1), 90-95 (2010-09-28)
A liquid chromatography-mass spectrometry (LC-MS) method for the identification and quantification of chlormequat (CQ) and mepiquat (MQ) in source waters with high sensitivity and specificity was established using WCX cartridges (150 mg/6 mL) for pre-concentration of the samples and using
H Karasali et al.
Bulletin of environmental contamination and toxicology, 83(5), 636-639 (2009-05-30)
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
[Extraction photometric method of determining 1,1-dimethyl piperidine chloride].
A A Gevorgian et al.
Gigiena i sanitariia, (4)(4), 72-72 (1986-04-01)
C S Evans et al.
Rapid communications in mass spectrometry : RCM, 15(15), 1341-1345 (2001-07-24)
Gas-phase cluster formation between the quaternary ammonium pesticides paraquat, diquat, difenzoquat, chlormequat and mepiquat, and chloride and acetate anions present in a liquid chromatography (LC) mobile phase, has been studied using electrospray mass spectrometry. The clusters of paraquat, mepiquat and
K Granby et al.
Food additives and contaminants, 18(10), 898-905 (2001-09-25)
An LC-MS/MS method for analysing glyphosate and aminomethylphosphonic acid (AMPA) in cereals was developed. The method is based on extraction with water and detection of the ions from the fragmentation m/z 170-->88 (glyphosate) and m/z 112-->30 (AMPA), using electrospray interface
Zuliang Luo et al.
Analytical and bioanalytical chemistry, 411(11), 2447-2460 (2019-03-13)
A multi-residue method was developed for the simultaneous determination of 24 plant growth regulators (PGRs) and 11 representative pesticides that were widely applied in plants used in traditional Chinese medicines (TCMs) by high-performance liquid chromatography coupled with tandem mass spectrometry
Xuenan Li et al.
Journal of food science, 85(9), 2754-2761 (2020-08-15)
N,N-dimethylpiperidinium (mepiquat) is a new process-induced compound formed from natural constituents during the cooking process. Mepiquat was first found in coffee and cereal products, but its formation mechanism in coffee is still unclear. In the current study, Arabica and Robusta
Kouichi Akaki
Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan, 45(4), 197-200 (2004-12-01)
A simple and rapid method was developed for the analysis of mepiquat chloride in grape, wine and juice by high-performance liquid chromatography with electrospray tandem mass spectrometry (LC/MS/MS). Mepiquat chloride was extracted with water-methanol (1:1). Extracted solution was adjusted to
Ayman H Kamel et al.
International journal of environmental research and public health, 17(4) (2020-02-15)
Screen-printed platforms integrated with molecularly imprinted polymers (MIP) were fabricated and characterized as potentiometric sensors for diquat (DQ). The synthesized MIP beads were studied as sensory carriers in plasticized poly(vinyl chloride) membranes. The sensors were constructed by using poly(3,4-ethylenedioxythiophene) (PEDOT)
Xu Zhou et al.
Se pu = Chinese journal of chromatography, 29(3), 244-248 (2011-06-11)
Ion-pair reagent was used as mobile phase for the simultaneous separation of chlormequat chloride and mepiquat chloride in plants. The rapid separation was performed on a Dionex IonPac NG1 guard column and a Dionex IonPac NS1 analytical column using 1.0
R K Juhler et al.
Journal of AOAC International, 82(2), 331-336 (1999-04-07)
The objective of the present work was to establish information on chlormequat and mepiquat residues in grain for human consumption. Chlormequat (2-chloro-N,N,N-trimethylethylammonium, CAS RN 7003-89-6) and mepiquat (1,1-dimethylpiperidinium, CAS RN 15302-91-7) are plant growth regulators used to stabilize stalks in
Janice Z Francesquett et al.
Journal of chromatography. A, 1592, 101-111 (2019-01-15)
In this study, a modified Quick Polar Pesticides (QuPPe) method, optimized by a central composite design, was developed to determine quaternary ammonium pesticides (QUATs) residues in barley and wheat by ultra-high-performance liquid chromatographic tandem mass spectrometry (UHPLC-MS/MS) using a hydrophilic
Fengzu Zhang et al.
Environmental monitoring and assessment, 185(11), 9101-9109 (2013-05-08)
A modified LC-MS method for the analysis of mepiquat residue in wheat, potato, and soil was developed and validated. A hydrophilic interaction liquid chromatographic column has been successfully used to retain and separate the mepiquat. Mepiquat residue dynamics and final
Managing mepiquat chloride and plant density for optimal yield and quality of cotton
Ren X, et al.
Field Crops Research, 149, 1-10 (2013)
Wen-Xi Li et al.
Ecotoxicology and environmental safety, 85, 137-143 (2012-09-08)
A simple, accurate and highly sensitive analytical method was developed in this study for determining the residues and dissipation dynamics of mepiquat chloride in soil and cotton crops (including plant and seed). The samples in this method were directly extracted
Jens H Andersen et al.
Food additives and contaminants, 24(2), 140-148 (2007-03-17)
An intercomparison study of the determinations of glyphosate, chlormequat and mepiquat residues in cereals was performed. Four samples comprising one blank, two incurred and one spiked sample were sent to six participating laboratories. For glyphosate, two laboratories reported considerably lower
Jay A Rosenheim
Journal of economic entomology, 106(3), 1286-1293 (2013-07-20)
Because the farmer is typically excluded from the experimental research setting, experimental research may face challenges in evaluating pest management tactics whose costs and benefits hinge on farmer decision-making. In these cases an ecoinformatics approach, in which observational data collected
Addissu G Ayele et al.
Plants (Basel, Switzerland), 9(7) (2020-07-11)
Verticillium wilt, caused by Verticillium dahliae Kleb., leads to significant losses in cotton yield and fiber quality worldwide. To investigate Verticillium wilt impact on photosynthesis rate, yield, and fiber quality, six upland cotton genotypes, namely Verticillium susceptible (DP 1612 B2XF)
X Esparza et al.
Journal of chromatography. A, 1216(20), 4402-4406 (2009-03-31)
In this work a LC-MS/MS method for the determination of two quaternary ammonium growth regulators (chlormequat and mepiquat) in food is reported. The separation was based on hydrophilic interaction liquid chromatography (HILIC) without the use of ion-pair reagents. A gradient
Sonja Riediker et al.
Journal of chromatography. A, 966(1-2), 15-23 (2002-09-07)
A sensitive and selective method is presented for the simultaneous analysis of the pesticides chlormequat and mepiquat at trace levels in tomato, pear, and wheat flour. The method entails direct injection of the food extract onto an on-line solid-phase extraction
Chayanis Sutcharitchan et al.
Food chemistry, 322, 126766-126766 (2020-04-20)
A simple, rapid, and effective method based on salting-out extraction and LC-MS/MS techniques was developed for the determination of 39 plant growth regulator (PGR) residues in two of the most common root and rhizome Chinese herbs, Codonopsis Radix (Dangshen) and
Xi-Feng Fan et al.
Guang pu xue yu guang pu fen xi = Guang pu, 29(4), 1119-1122 (2009-07-25)
To evaluate the effects of a worldwide used plant growth regulator mepiquat chloride on the nutrition value and safety of seeds of transgenic Bt cotton, inorganic element components and contents in seeds of Bt cotton (Gossypium hirsutum cv. Guoxin 6)
Yuan Yuan et al.
Food chemistry, 227, 173-178 (2017-03-10)
This study describes, for the first time, the role of pipecolic acid betaine and pipecolic acid, naturally present in some foods, in the formation of the plant growth regulator N,N-dimethylpiperidinium (mepiquat) under dry thermal conditions. The formation of mepiquat and
FT-Raman determination of Mepiquat chloride in agrochemical products
Quintas G, et al.
Vibrational Spectroscopy, 36, 41-46 (2004)
Xin-Gang Liu et al.
Journal of AOAC International, 91(5), 1110-1115 (2008-11-05)
A liquid chromatographic/mass spectrometric (LC/MS) method is reported for the determination of the onium-type plant growth regulator mepiquat chloride in cotton and soil. The pesticide was extracted from the sample with ethanol and water containing 2% NH4Cl. The extract was
Enrico Defranchi et al.
Frontiers in neuroengineering, 4, 6-6 (2011-05-18)
Detection and characterization of chemically induced toxic effects in the nervous system represent a challenge for the hazard assessment of chemicals. In vivo, neurotoxicological assessments exploit the fact that the activity of neurons in the central and peripheral nervous system
Mohammad-Amir Aghaee et al.
Journal of economic entomology, 112(3), 1207-1216 (2019-01-08)
Economically damaging infestations of Lygus lineolaris (Palisot de Beauvois) (Hemiptera: Miridae), the tarnished plant bug, have been increasing in North Carolina and Virginia cotton since 2009. We conducted experiments to compare prophylactically timed sprays based on cotton phenology and current
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