Quantitative determination of methylene blue in environmental samples by solid-phase extraction and ultra-performance liquid chromatography-tandem mass spectrometry: a green approach

RSC Advances ◽  
2014 ◽  
Vol 4 (64) ◽  
pp. 34037-34044 ◽  
Author(s):  
Mohammad Rizwan Khan ◽  
Moonis Ali Khan ◽  
Zeid Abdullah Alothman ◽  
Ibrahim Hotan Alsohaimi ◽  
Mu Naushad ◽  
...  
Keyword(s):  
Solid Phase ◽  
Oxygen Demand ◽  
Industrial Effluents ◽  
Ultra Performance Liquid Chromatography ◽  
Aquatic Life ◽  
Green Approach ◽  
Quantitative Monitoring ◽  
Liquid Chromatography Tandem Mass ◽  
High Chemical Oxygen Demand

Industrial effluents with dyes may have appreciably high chemical oxygen demand and suspended solids, posing adverse effects to both humans and aquatic life; therefore, quantitative monitoring of these effluents is essential.

Synthesis of DABCO-based ionic liquid functionalized magnetic nanoparticles as a novel sorbent for the determination of cephalosporins in milk samples by dispersive solid-phase extraction followed by ultra-performance liquid chromatography-tandem mass spectrometry

2019 ◽  
Vol 43 (34) ◽  
pp. 13554-13570 ◽  
Author(s):  
Hamed Sahebi ◽  
Elaheh Konoz ◽  
Ali Ezabadi
Keyword(s):  
Ionic Liquid ◽  
Solid Phase ◽  
Ultra Performance Liquid Chromatography ◽  
Dispersive Solid Phase Extraction ◽  
Magnetic Iron Oxide Nanoparticles ◽  
Chromatography Tandem Mass Spectrometry ◽  
Functionalized Magnetic Nanoparticles ◽  
Liquid Chromatography Tandem Mass ◽  
First Time

In this study, DABCO-based ionic liquid-functionalized magnetic iron oxide nanoparticles were synthesized for the first time by the quaternization reaction with 1-(2,3-dihydroxypropyl)-1,4-diazabicyclo[2.2.2]octanylium chloride and chloro-functionalized Fe3O4 nanoparticles.

Determination of 12 Carbamate Insecticides in Typical Vegetables and Fruits by Rapid Multi-Plug Filtration Cleanup and Ultra-Performance Liquid Chromatography/Tandem Mass Spectrometry Detection

2019 ◽  
Vol 58 (2) ◽  
pp. 109-116
Author(s):  
Lili Ma ◽  
Liuwei Zhao ◽  
Jiaqi Wang ◽  
Canping Pan ◽  
Cong Liu ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Tandem Mass Spectrometry ◽  
Matrix Effects ◽  
Solid Phase ◽  
Ultra Performance Liquid Chromatography ◽  
Tandem Mass ◽  
Liquid Chromatography Tandem Mass ◽  
Vegetables And Fruits

Abstract A multiresidue method for determining 12 carbamate pesticides in purple cabbage, orange, watermelon, cucumber, cowpea and Lactuca sativa L. employing multi-plug filtration cleanup (m-PFC) and ultra-performance liquid chromatography coupled with electrospray ionization tandem mass spectrometry (UPLC-ESI-MS/MS) was developed. M-PFC was carried out by cleanup at dispersive solid phase extraction (d-SPE), one m-PFC tip-filtration, two m-PFC tip-filtration and other methods (1–3 m-PFC cleanups). Results demonstrated that filtration simplified the cleanup method compared with d-SPE and other m-PFC methods (1–3 m-PFC cleanups). The method validation results showed that the method was linear, selective and accurate. The limits of quantification (LOQs) were 0.05–5.0 μg/kg, and the recoveries were in the range of 70.1–119.9% in different matrices. Although matrix effects were observed, they were successfully compensated using matrix-matched calibration. Finally, the developed method was successfully applied to detect pesticides in real samples.

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