Determination of plant growth regulators in pears by microwave-assisted extraction and liquid chromatography with electrospray ionization mass spectrometry

2014 ◽  
Vol 37 (11) ◽  
pp. 1352-1358 ◽  
Author(s):  
Xuejin Mao ◽  
Lijuan Tang ◽  
Ting Tan ◽  
Yiqun Wan
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Plant Growth ◽  
Electrospray Ionization ◽  
Growth Regulators ◽  
Ionization Mass ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction

scholarly journals Simplified Determination of Imidazolinone Herbicides in Soil at Parts-per-Billion Level by Liquid Chromatography/ Electrospray Ionization Tandem Mass Spectrometry

1997 ◽  
Vol 80 (2) ◽  
pp. 426-432 ◽  
Author(s):  
Steven J Stout ◽  
Adrian R Dacunha ◽  
Maximilian M Safarpour
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Electrospray Ionization ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Soil Extracts ◽  
New Class ◽  
Assisted Extraction ◽  
Imidazolinone Herbicides

Abstract Imidazolinones are a significant new class of low-use-rate, reduced-environmental-risk herbicides for protection of a wide variety of agricultural commodities. Because of their low rates of application, residues of imidazolinones in soil need to be monitored at low parts-per-billion (ppb) levels. Greatly simplified cleanup procedures were reported recently for determining imidazolinones in soil at the 1 ppb level by combining microwave-assisted extraction (MAE) with gas chromatography/electron capture negative chemical ionization mass spectrometry (GC/ECNCI) and for determining imidazolinones in water by using liquid chromatography/electrospray ionization mass spectrometry (LC/ESMS) and liquid chromatography/electrospray ionization tandem MS (LC/ESMS/MS). By merging the extraction and cleanup procedures for determining imidazolinones in soil with LC/ESMS/MS, instrumental analysis time was reduced to that approximating sample preparation time, and the drawbacks of in situ methylation required for GC/ECNCI were eliminated. Recoveries of imazethapyr, the most widely used imidazolinone, from a variety of soil types fortified at 1–50 ppb averaged 92% with a standard deviation of 9.7%. Control soil extracts gave apparent residues of <0.2 ppb. These results were almost identical to those previously reported for GC/ECNCI.

Development of microwave-assisted extraction and liquid chromatography-tandem mass spectrometry for determination of maleic hydrazide residues in tobacco

2015 ◽  
Vol 7 (12) ◽  
pp. 5103-5107 ◽  
Author(s):  
Leijun Wang ◽  
Ting Fei ◽  
Dawei Qi ◽  
Yunfei Sha ◽  
Da Wu ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Maleic Hydrazide ◽  
Tandem Mass ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Chromatography Tandem Mass Spectrometry ◽  
Assisted Extraction ◽  
Liquid Chromatography Tandem Mass

Herein, an effective and rapid method involving microwave-assisted extraction (MAE) and liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed for the determination of maleic hydrazide residues in tobacco.

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