Novel use of PVPP in a modified QuEChERS extraction method for UPLC-MS/MS analysis of neonicotinoid insecticides in tea matrices

2015 ◽  
Vol 7 (13) ◽  
pp. 5521-5529 ◽  
Author(s):  
Ruyan Hou ◽  
Weiting Jiao ◽  
Yu Xiao ◽  
Jiagang Guo ◽  
Yaning LV ◽  
...  
Keyword(s):  
Simultaneous Determination ◽  
Extraction Method ◽  
Neonicotinoid Insecticides ◽  
Esi Ms ◽  
Modified Quechers ◽  
Ms Analysis

A rapid UPLC-ESI (+)-MS/MS method was developed and validated for simultaneous determination of eight neonicotinoid insecticides (dinotefuran, nitenpyram, thiamethoxam, clothianidin, imidacloprid, acetamiprid, thiacloprid and imidaclothiz) in tea samples.

A novel extraction method for simultaneous determination of neonicotinoid insecticides and their metabolites in human urine

2019 ◽  
Vol 11 (19) ◽  
pp. 2571-2578 ◽  
Author(s):  
Shiming Song ◽  
Yuan He ◽  
Bo Zhang ◽  
Mingwei Gui ◽  
Jiping Ouyang ◽  
...  
Keyword(s):  
Simultaneous Determination ◽  
Human Urine ◽  
Extraction Method ◽  
Urine Samples ◽  
Human Urine Samples ◽  
Neonicotinoid Insecticides

An LLME-LC-MS/MS method for the detection of trace levels of six neonicotinoid insecticides and their metabolites in human urine samples.

MONITORING OF PESTICIDE RESIDUES IN CROPS IRRIGATED WITH RECLAIMED WATER BY A MULTIRESIDUE METHOD BASED ON MODIFIED QUECHERS

2021 ◽  
Author(s):  
Maria Jesus Martinez Bueno ◽  
Mar García Valverde ◽  
Maria del Mar Gomez-Ramos ◽  
Antonio Valverde ◽  
Marí­a Martínez Galera ◽  
...  
Keyword(s):  
Simultaneous Determination ◽  
Pesticide Residues ◽  
Extraction Method ◽  
Reclaimed Water ◽  
Soil P ◽  
Multiresidue Method ◽  
Modified Quechers

In this study, we aimed to validate and apply a quick and easy extraction method for the simultaneous determination of 27 pesticide residues at trace levels in agricultural samples (soil,...

Simultaneous determination of 117 pesticides and 30 mycotoxins in raw coffee, without clean-up, by LC-ESI-MS/MS analysis

2018 ◽  
Vol 1004 ◽  
pp. 40-50 ◽  
Author(s):  
Bárbara Reichert ◽  
André de Kok ◽  
Ionara Regina Pizzutti ◽  
Jos Scholten ◽  
Carmem Dickow Cardoso ◽  
...  
Keyword(s):  
Simultaneous Determination ◽  
Esi Ms ◽  
Ms Analysis

scholarly journals Simultaneous Determination of Sulphur metabolites in Arabidopsis thaliana via LC-ESI-MS/MS and 34S-metabolic Labelling

2011 ◽  
Vol 23 (4) ◽  
pp. 324-331 ◽  
Author(s):  
Chin-Lin Hsieh ◽  
Kai-Wun Yeh ◽  
Luit J. De Kok ◽  
Ryh-Nan Pan ◽  
Yueh-Hsiung Kuo ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Simultaneous Determination ◽  
Esi Ms ◽  
Metabolic Labelling

Simultaneous Determination of Four Herbicide and Pesticide Residues in Chinese Green Tea Using QuEChERS Purification Procedure and UPLC-MS/MS Analysis

2013 ◽  
Vol 634-638 ◽  
pp. 1586-1590
Author(s):  
Su Fang Wang ◽  
Shou Jie Zhang ◽  
Chun Hong Dong ◽  
Guo Qing Wang ◽  
Jun Feng Guo ◽  
...  
Keyword(s):  
Formic Acid ◽  
Simultaneous Determination ◽  
Green Tea ◽  
Limit Of Detection ◽  
Multiple Reaction Monitoring ◽  
Graphitized Carbon Black ◽  
Ms Analysis ◽  
Relative Standard ◽  
Limit Of Quantitation

A method for simultaneous determination of residuals of four herbicides and pesticides, simazine, carboxin, diflubenzuron and rotenone, in Chinese green tea was developed. In the proposed method, the tea powder was placed in a centrifuge tube with a plug, extracted in saturated aqueous sodium chloride solution and acetonitrile, agitated using vortex oscillator, and then centrifuged 5 min at 4000 rpm. The supernatant solution was purified by primary secondary amine (PSA) sorbent, C18 power, and graphitized carbon black powder, respectively. Then the purified extracts were dissolved with acetonitrile:0.1% formic acid aqueous solution (40:60, V/V) and agitated, filtered using a syringe with 0.22 μm nylon filter prior to UPLC-MS/MS analysis. The UPLC analysis was performed on an ACQUITY UPLC® HSS T3 column (2.1 mm×100 mm, 1.8 µm), using acetonitrile-0.1% formic acid as mobile phase with the flow rate as 0.3 mL•min-1. Injection volume was 10 µL. Positive ionization mode was applied, and the ions were monitored in the multiple reaction monitoring (MRM) mode with curtain gas 0.069 MPa, collision gas 0.052 MPa, ESI ion spray voltage 5000 V, temperature 550 °C, nebulizer gas 0.24 MPa, and turbo gas 0.28 MPa. The limit of detection (LOD) and limit of quantitation (LOQ) of the proposed method are 1 μg•kg-1and 5 μg•kg-1, respectively. The average recoveries of the four pesticides at 10, 20, and 50 µg•kg-1spiking levels range from 77.4% to 95.3%. TheSupersSuperscript textcript textrelative standard deviation (RSD) (n=6) range form 11.83% to 4.52%.

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