Matrix solid phase dispersion–Soxhlet simultaneous extraction clean-up for determination of organochlorine pesticide residues in tobacco

2005 ◽  
Vol 383 (5) ◽  
pp. 869-874 ◽  
Author(s):  
Jibao Cai ◽  
Yun Gao ◽  
Xiaolan Zhu ◽  
Qingde Su
Keyword(s):  
Organochlorine Pesticide ◽  
Pesticide Residues ◽  
Solid Phase ◽  
Simultaneous Extraction ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion ◽  
Organochlorine Pesticide Residues

scholarly journals Determination of Organochlorine Pesticide and Polychlorinated Biphenyl Residues in Fatty Fish by Tandem Solid-Phase Extraction Cleanup

1996 ◽  
Vol 79 (5) ◽  
pp. 1209-1214 ◽  
Author(s):  
Frank J Schenck ◽  
Lori Calderon ◽  
Lynda V Podhorniak
Keyword(s):  
Solid Phase Extraction ◽  
Organochlorine Pesticide ◽  
Pesticide Residues ◽  
Polychlorinated Biphenyl ◽  
Solid Phase ◽  
Electron Capture Detection ◽  
Phase Extraction ◽  
Fatty Fish ◽  
Organochlorine Pesticide Residues

Abstract A rapid, multiresidue solid-phase extraction (SPE) technique for determination of organochlorine pesticide and polychlorinated biphenyl (PCB) residues in nonfatty fish was modified for use with fatty fish. In the modified procedures, samples are extracted with acetonitrile, and the extract is cleaned up with both C18 and Florisil SPE columns. Residues are determined by gas chromatography with electron capture detection. The original method was modified for use with fatty fish by reducing the amount of tissue extracted and by using an improved Florisil SPE cleanup. Recovery data are presented for 24 fortified organochlorine pesticide residues (0.12 ppm) and 3 fortified PCB residues (0.80 ppm) from flounder, bluefish, and shad samples, which contained 0.8,5.4, and 22.6% fat, respectively. For the 3 types of fish, recoveries of 23 of 24 fortified organochlorine pesticide residues ranged from 55 to 129%, and recoveries of 3 fortified PCB residues ranged from 55 to 104%. There were no significant differences in recovery based on fish species and/or fat content for the majority of residues studied. This SPE method and the official AOAC method yielded comparable results for fish containing incurred organochlorine residues.

scholarly journals A Beta/ZSM-22 Zeolites-Based-Mixed Matrix Solid-Phase Dispersion Method for the Simultaneous Extraction and Determination of Eight Compounds with Different Polarities in Viticis Fructus by High-Performance Liquid Chromatography

Molecules ◽  
2019 ◽  
Vol 24 (19) ◽  
pp. 3423 ◽  
Author(s):  
He ◽  
Li ◽  
Pang ◽  
Wang ◽  
Jin ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
High Performance ◽  
Solid Phase ◽  
Mass Ratio ◽  
Mixed Matrix ◽  
Dispersion Method ◽  
Simultaneous Extraction ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion

Viticis Fructus (VF) was named Manjingzi as a commonly used traditional Chinese medicine (TCM) targeting various pains and inflammation for more than 2000 years. To guarantee the quality of Viticis Fructus, a simple, quick and eco-friendly Beta/ZSM-22 zeolites-based-mixed matrix solid-phase dispersion method (B/Z-MMSPD) was established for simultaneous extraction and determination of eight compounds (two phenolic acids, two iridoid glycosides, vanillin and three flavonoids) with different polarities from Viticis Fructus by high performance liquid chromatography coupled with a diode array detector (HPLC-DAD). Beta and ZSM-22 were mixed as the sorbent. Water, tetrahydrofuran and methanol were blended with certain ratio as the eluent. Several parameters including types of sorbents, mass ratio of Beta to ZSM-22, mass ratio of matrix to sorbent, grinding time, types, concentration and volume of eluent were optimized. The recoveries of eight analytes were within the range of 95.0%–105% (RSDs ≤ 4.13%). The limits of detection and limits of quantitation ranged from 0.5 to 5.5 μg/g and from 1.5 to 16 μg/g, respectively. Compared to the traditional extract methods, it was a simple, rapid, efficient and green method. The results demonstrated that a simple, rapid, efficient and green B/Z-MMSPD was developed for the simultaneous extraction and determination of eight target analytes with different polarities for quality control of Viticis Fructus.

scholarly journals Validation of a Method for the Determination of Multiclass Pesticide Residues in Fruit Juices by Liquid Chromatography/Tandem Mass Spectrometry after Extraction by Matrix Solid-Phase Dispersion

2002 ◽  
Vol 85 (3) ◽  
pp. 724-730 ◽  
Author(s):  
Daniela Perret ◽  
Alessandra Gentili ◽  
Stefano Marchese ◽  
Manuel Sergi ◽  
Giuseppe D'Ascenzo
Keyword(s):  
Mass Spectrometry ◽  
Pesticide Residues ◽  
Solid Phase ◽  
Fruit Juices ◽  
Tandem Mass ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion ◽  
Chromatography Tandem Mass Spectrometry ◽  
Liquid Chromatography Tandem Mass

Abstract A multiresidue method was developed and validated for the determination of pesticide residues (omethoate, dimethoate, carbendazim, propoxur, thiabendazole, carbaryl, pirimicarb, azinphos-methyl, methidathion, and iprodione) in fruit juices. The samples were extracted by matrix solid-phase dispersion with diatomaceous earth and analyzed by liquid chromatography/tandem mass spectrometry. The method detection limits were <0.2 ppb for all pesticides; the relative standard deviations for analyses of samples fortified over the range of 2–50 ng/g were <9%, and the recoveries for each pesticide were all between 77 and 102%. The proposed method was used to analyze 21 commercial fruit juices; pesticide residues were found in 71% of the samples.

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