Ion-trap versus quadrupole for analysis of quaternary ammonium herbicides by LC-MS

Castro, R.; Moyano, Encarnación; Galcerán, M.T.

doi:10.1007/bf02490423

Cited by 25 publications

(16 citation statements)

References 23 publications

(18 reference statements)

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“…Different quantitative analytical methods for acidic, neutral, and cationic pesticides have been developed based on LC-QIT-MS [35,41,43] or in MS-MS in the multiple reaction monitoring (MRM) mode by using extracted ion chromatograms [36,48,50,76,77,86].…”

Section: Pesticides and Transformation Products (Tps)mentioning

confidence: 99%

“…Other apolar stationary phases are based on synthetic polymers such as the styrene-divinylbenzene copolymer [108,109]. As mobile ŸUse of ion pairing reagents volatiles -Anionic surfactants -Ammonium quaternary herbicides [52,53] [48, 50,77] There are other LC conditions that can have a strong influence in the appropriate separation and chromatographic profile such as temperature, flow-rate or column diameter. Efficient separation of three macrolide antibiotics can be achieved by the short C 18 column using an elevate temperature due to a significant decrease in the height equivalent to a theorical plate (HETP).…”

Section: Liquid Chromatographic Conditionsmentioning

confidence: 99%

“…Most stationary phases are based on silica that has been chemically modified with octadecyl (C 18 or ODS) or octyl (C 8 or OS) [31,32,77,87]. Aminopropyl, cyanopropyl, or phenyl silica can also be used for reversed-phase separations [75,81,83].…”

Section: Liquid Chromatographic Conditionsmentioning

confidence: 99%

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Liquid Chromatography-Ion Trap-Mass Spectrometry and its Application to Determine Organic Contaminants in the Environment and Food

Andreu¹,

Picó

2005

CAC

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Recent experiences with liquid chromatography-quadrupole ion trap-mass spectrometry (LC-QIT-MS), as an analytical tool for determining trace amounts of organic contaminants in food and environmental samples, are addressed in this review. A brief introduction to the fundamental theory for quadrupole ion trap devices illustrates possibilities and limitations of this technique. Special attention is paid to the impact of sample preparation and chromatography on the ionization efficiency of analytes isolated from complex food and environmental matrices. The capacity to provide useful data for quantifying organic contaminants, and the possibility of obtaining structural information for identifying target and non-target compounds, are discussed. The flexibility, high sensitivity and multi-stage tandem mass spectrometric capability of the QIT are all illustrated. Contemporary applications of this technique to study organic contaminants in food and environment are presented.

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Section: Pesticides and Transformation Products (Tps)mentioning

confidence: 99%

Section: Liquid Chromatographic Conditionsmentioning

confidence: 99%

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Liquid Chromatography-Ion Trap-Mass Spectrometry and its Application to Determine Organic Contaminants in the Environment and Food

Andreu¹,

Picó

2005

CAC

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“…The occurrence of plant growth regulators in the environment has gained attention worldwide in recent years due to their widespread application [1][2][3][4]. Chlormequat (CQ) and mepiquat (MQ), the two quaternary ammonium compounds, are widely applied as the plant growth regulators to promote flower formation, improve fruit setting in fruits and vegetables and reduce vegetative growth and the inhibition of sprouting [2,5,6].…”

Section: Introductionmentioning

confidence: 99%

“…HPLC coupled to mass spectrometry (LC-MS) or tandem MS (LC-MS-MS) has been used to analyze plant growth regulators in water [1,2,4,6,9,10]. Pre-concentration is required to meet the requirement of the PRML for analysis of environmental samples, which is difficult because CQ and MQ are ionic compounds and with high water solubility [8].…”

Section: Introductionmentioning

confidence: 99%

An improved method for analyzing chlormequat and mepiquat in source waters by solid-phase extraction and liquid chromatography–mass spectrometry

Jin

et al. 2010

Analytica Chimica Acta

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a b s t r a c tA 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 the CAPCELL PAK CR 1:4 (2.0 mm × 150 mm 5 m, SCX:C18 = 1:4) column containing strong cationic exchange resins and C18 for separation. The method could solve the problem for pre-concentrating ionic compounds from water samples and avoid the MS instrument fouling problem accompanied with the use of ion-pair reagents. After the optimization of analytical conditions, quantification was achieved in the positive electrospray ionization mode using selected ion monitoring. The samples were analyzed with multi-channel mode with quantification performed at 30 V cone voltage to ascertain the sensitivity and qualitative analysis performed at 60 V cone voltage simultaneously. The method detection limits (MDLs) of CQ and MQ in source water were determined to be 14 and 22 ng L −1 . Finally, the method was used to quantify CQ and MQ in several source waters, which gave a level ranging from below the quantitation limit to 28 ng L −1 .

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Analysis of Orphan and Difficult Herbicides and/or Pesticides

Raina‐Fulton

Yang

2017

Encyclopedia of Analytical Chemistry

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This article reviews the main chromatography/mass spectrometry methods for the analysis of four main categories of herbicides and related pesticides including cationic charged herbicides (quaternary ammonium (quat) herbicides), anionic charged herbicides or organophosphorus herbicides (glyphosate (GLYP) and glufosinate (GLUF)), sulfonylurea herbicides that utilize liquid chromatography‐positive ion electrospray ionization‐tandem mass spectrometry (LC‐ESI+‐MS/MS), and phenoxyacid herbicides that have optimal mass spectrometry (MS) sensitivity with liquid chromatography‐negative ion electrospray ionization‐tandem mass spectrometry (LC‐ESI−‐MS/MS). In addition, selective degradation products of these herbicides that have been analyzed by chromatography‐mass spectrometry methods will be reviewed. Selected pesticides that are frequently simultaneously analyzed in targeted class‐specific methods for these four chemical classes of herbicides will be further discussed. The focus of this review is on the chromatography‐mass spectrometric detection methods for these classes of herbicides with priority given to liquid chromatography (LC)‐tandem mass spectrometry methods. These methods apply to the analysis of herbicides in food and environmental samples although sample preparation or clean‐up requirements may vary. The review will provide an overview to users in the best currently available chromatography‐mass spectrometry methods for these targeted chemical classes with an approach to include a broad range of herbicides within the class for future diversity in method development.

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Ion-trap versus quadrupole for analysis of quaternary ammonium herbicides by LC-MS

Cited by 25 publications

References 23 publications

Liquid Chromatography-Ion Trap-Mass Spectrometry and its Application to Determine Organic Contaminants in the Environment and Food

Liquid Chromatography-Ion Trap-Mass Spectrometry and its Application to Determine Organic Contaminants in the Environment and Food

An improved method for analyzing chlormequat and mepiquat in source waters by solid-phase extraction and liquid chromatography–mass spectrometry

Analysis of Orphan and Difficult Herbicides and/or Pesticides

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