Results 181 to 190 of about 9,758 (222)

Método Quechers

Portal de Vídeo Didáctico de la Universidad de Sevilla
El presente vídeo didáctico trata sobre la técnica de extracción avanzada de analitos de una muestra: método QuEChERS. QuEChERS es el acrónimo de “rápido, fácil, barato, efectivo, resistente y seguro” en inglés “Quick, Easy, Cheap, Effective, Rugged and Safe”. Es un tipo de extracción en fase sólida dispersiva (d-SPE) desarrollada originalmente para la
Julia Martín Bueno, Laura Martín Pozo, Noelia García Criado, Carmen Mejías Padilla, Esteban Alonso Álvarez, Irene Aparicio Gómez, Juan Luis Santos Morcillo, Marina Arenas Molina   +7 more
openaire   +1 more source

Evaluation of a modified QuEChERS method for analysis of mycotoxins in rice

Food Chemistry, 2014
A simple and efficient QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) sample preparation method was modified to provide good analytical results for 14 mycotoxins in rice. The method involved mixing sample with acidified aqueous acetonitrile, followed by salt-out liquid partitioning using MgSO4, NaCl, and citrate buffer salts.
Urairat Koesukwiwat, Kunaporn Sanguankaew, Natchanun Leepipatpiboon   +2 more
openaire   +2 more sources

Determination of avermectins: A QuEChERS approach to the analysis of food samples

Food Chemistry, 2015
We present a simple method for extracting avermectines from meat, based on a QuEChERS approach followed by liquid chromatography (LC) coupled to triple quadrupole (QqQ) tandem mass spectrometry (MS/MS). The compounds considered are ivermectin, abamectin, emamectin, eprinomectin, doramectin and moxidectin.
Rubies, A, Antkowiak, S, Granados, M, Companyo, R, Centrich, F   +4 more
openaire   +3 more sources

A modified QuEChERS approach for the screening of dioxins and furans in sediments

Analytical and Bioanalytical Chemistry, 2016
A rapid extraction and cleanup method for the screening of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in sediments is described which combines a modified QuEChERS extraction with carbon reversed-phase solid phase extraction cleanup. This approach is compared to the classical Soxhlet extraction and multi-column cleanup method in
Liad, Haimovici, Eric J, Reiner, Sladjana, Besevic, Karl J, Jobst, Matthew, Robson, Terry, Kolic, Karen, MacPherson   +6 more
openaire   +2 more sources

Detection of pesticides in crops: A modified QuEChERS approach

Food Control, 2012
Abstract The general term “pesticide” includes a large number of substances that belong to many different chemical classes. Pesticides are applied to crops at various stages of cultivation to provide protection against weeds and pests, and during post-harvest storage to preserve quality.
Daniela Marchis, Gian Luca Ferro, Paola Brizio, Stefania Squadrone, Maria Cesarina Abete   +4 more
openaire   +1 more source

Research progress of applications for nano-materials in improved QuEChERS method

Critical Reviews in Food Science and Nutrition, 2023
The quick, easy, cheap, effective, rugged, and safe (QuEChERS) approach is widely used in sample pretreatment in agricultural products, food, environment, etc. And nano-materials are widely used in QuEChERS method due to its small size and large specific surface area.
Qi, Zhou, Congcong, Yu, Lingling, Meng, Wenhua, Ji, Songnan, Liu, Canping, Pan, Tao, Lan, Lihong, Wang, Bin, Qu   +8 more
openaire   +2 more sources

Development and Application of a New QuEChERS-Molecularly Imprinted Solid Phase Extraction (QuEChERS-MISPE) Technique for Analysis of DDT and Its Derivatives in Vegetables

Food Chemistry
The current study synthesized a molecularly imprinted polymer, combined it with the QuEChERS method to form a new hybrid technique, the QuEChERS-MISPE as an alternative to the QuEChERS-dSPE for analysis of DDTs as model pesticides. Batch studies confirmed that the binding of the DDTs to the MIP cavities formed a monolayer formation through ...
Somandla Ncube
exaly   +3 more sources

การตรวจสอบความใช้ได้ของวิธีการวิเคราะห์คัดกรองสารเสพติดในน้ำวุ้นลูกตาด้วยเทคนิคการสกัด QuEChERS และตรวจด้วย LC-MS/MS

2023
น้ำวุ้นลูกตาถูกนำมาใช้เป็นตัวอย่างทางเลือก เนื่องจากทนต่อการเปลี่ยนแปลงหลังการเสียชีวิต รวมถึงมีส่วนประกอบที่เป็นเซลล์น้อยจึงสามารถนำมาเตรียมตัวอย่างได้ง่าย การเตรียมตัวอย่างทางนิติพิษวิทยาสามารถเตรียมได้หลายวิธี เช่น Solid Phase Extraction (SPE) และLiquid-Liquid Extraction (LLE) แต่มีข้อเสียคือใช้เวลาในการเตรียมนาน มีค่าใช้จ่ายสูงและใช้สารที่เป็นอ ...
openaire   +1 more source

Application of QuEChERS Method in Spray Deposition Studies

Madras Agricultural Journal, 2012
Pesticides are widely used in agriculture for the management of pests (weeds, insects or pathogens). They are generally applied as a spray to cover the target (e.g. an insect, leaf surfaces or part of a plant) with pesticide-laden droplets. Spray may, however, be lost to non- target areas within a crop through deposition on to the soil or on non-target
Jayashree G C, Anantha Krishnan D
openaire   +1 more source

????????-MRM ?????????? (QuEChERS) ?? ?????? ???????????????????? ?????? ?????????????????????? ???????????????? ???????????????????? ?? ???????????? ?? ??????????????

2011
???????????????????? ?????????????? ???????????????? (QuChERS ) ???????????????????? ???????????????????? ???????????????????? 9 ???????????????????? (??????, ??????, ????????????????, ????????????????????????????) ?? ???????????? ???? ??????????????. ???????????????????????????????? ?????????? ?????? ?? ?????? ???? ??????, ?? ?????????? ??????/???? (??
openaire   +1 more source