scholarly journals Occurrence of Fungicides in Vineyard and the Surrounding Environment

Molecules ◽  
2021 ◽  
Vol 26 (20) ◽  
pp. 6152
Author(s):  
Meruyert Sergazina ◽  
Lua Vazquez ◽  
Maria Llompart ◽  
Thierry Dagnac
Keyword(s):  
Solid Phase ◽  
Extraction Techniques ◽  
Environmental Matrices ◽  
Tea Leaves ◽  
Ultrasound Assisted Extraction ◽  
Leaf Analysis ◽  
Phase Dispersion ◽  
Surrounding Environment ◽  
Assisted Extraction ◽  
Grape Leaf

Seventeen fungicides were determined in different matrices from vineyard areas, including vine leaves, soils, grapes and water, using gas chromatography coupled to tandem mass spectrometry (GC-MS/MS). For leaf analysis, ultrasound-assisted extraction (UAE) was performed evaluating different solvents. UAE was compared with other extraction techniques such as vortex extraction (VE) and matrix solid-phase dispersion (MSPD). The performance of the UAE method was demonstrated on vine leaf samples and on other types of samples such as tea leaves, underlining its general suitability for leaf crops. As regards other matrices, soils were analyzed by UAE and microwave-assisted extraction (MAE), grapes by UAE and waters by SPE using cork as the sorbent. The proposed method was applied to 17 grape leaf samples in which 14 of the target fungicides were detected at concentrations up to 1000 μg g−1. Furthermore, the diffusion and transport of fungicides was demonstrated not only in crops but also in environmental matrices.

scholarly journals Determination of Pesticide Residues in Sewage Sludge: A Review

2010 ◽  
Vol 93 (6) ◽  
pp. 1692-1702 ◽  
Author(s):  
José L Tadeo ◽  
Consuelo Sánchez-Brunete ◽  
Beatriz Albero ◽  
Ana I Garcí-Valcárcel
Keyword(s):  
Sewage Sludge ◽  
Pesticide Residues ◽  
Solid Phase ◽  
Soxhlet Extraction ◽  
Agricultural Products ◽  
Toxic Substances ◽  
Ultrasound Assisted Extraction ◽  
Phase Dispersion ◽  
Assisted Extraction

Abstract Pesticides are widely applied to protect plants from diseases, weeds, and insect damage, and they usually come into contact with soil where they may undergo a variety of transformations and provide a complex pattern of metabolites. Spreading sewage sludge on agricultural lands has been actively promoted by national authorities as an economic way of recycling. However, as a byproduct of wastewater treatment, sewage sludge may contain pesticides and other toxic substances that could be incorporated into agricultural products or be distributed in the environment. This article reviews the determination of pesticides in sewage sludge samples. Sample preparation including pretreatment, extraction, and cleanup, as well as the subsequent instrumental determination of pesticide residues, are discussed. Extraction techniques such as Soxhlet extraction, ultrasound-assisted extraction, pressurized liquid extraction, supercritical fluid extraction, and matrix solid-phase dispersion and their most recent applications to the determination of pesticides in sewage sludge samples are reviewed. Determination of pesticides, generally carried out by GC and HPLC coupled with different detectors, especially MS for the identification and quantification of residues, is summarized and discussed.

scholarly journals Extraction of Phenolic Compounds and Terpenes from Cannabis sativa L. By-Products: From Conventional to Intensified Processes

Antioxidants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 942
Author(s):  
Emilie Isidore ◽  
Hamza Karim ◽  
Irina Ioannou
Keyword(s):  
Phenolic Compounds ◽  
Cannabis Sativa ◽  
Biological Activities ◽  
Operating Conditions ◽  
Extraction Techniques ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Whole Plant ◽  
Conventional Solvent Extraction ◽  
By Products

Cannabis sativa L. is a controversial crop due to its high tetrahydrocannabinol content varieties; however, the hemp varieties get an increased interest. This paper describes (i) the main categories of phenolic compounds (flavonoids, stilbenoids and lignans) and terpenes (monoterpenes and sesquiterpenes) from C. sativa by-products and their biological activities and (ii) the main extraction techniques for their recovery. It includes not only common techniques such as conventional solvent extraction, and hydrodistillation, but also intensification and emerging techniques such as ultrasound-assisted extraction or supercritical CO2 extraction. The effect of the operating conditions on the yield and composition of these categories of phenolic compounds and terpenes was discussed. A thorough investigation of innovative extraction techniques is indeed crucial for the extraction of phenolic compounds and terpenes from cannabis toward a sustainable industrial valorization of the whole plant.

scholarly journals Recent Trends in Extraction Techniques for High Value Compounds from Algae as Food Additives

2018 ◽  
Vol 6 (8) ◽  
pp. 1008 ◽  
Author(s):  
Saniye Akyil ◽  
Işıl İlter ◽  
Mehmet Koç ◽  
Figen Ertekin
Keyword(s):  
Subcritical Water ◽  
Food Additives ◽  
Process Conditions ◽  
Extraction Techniques ◽  
Subcritical Water Extraction ◽  
Ultrasound Assisted Extraction ◽  
Algae Biomass ◽  
Green Extraction ◽  
Advantages And Disadvantages ◽  
Assisted Extraction

Algae have been considered as a source of high value bioactive compounds including pigments, lipids, fatty acids, polysaccharides, antioxidants and minerals. These compounds serve as a source of nutrition for both humans and animals and as additives in food production. Conventional solvent and/or green extraction techniques are mostly applied to extract these compounds from algae biomass. In this review, paper the most frequently used green extraction techniques such as supercritical fluid extraction, microwave assisted extraction, ultrasound-assisted extraction, pressurized liquid extraction, subcritical water extraction and pulsed electric field extraction were investigated in terms of their process conditions, applications, advantages and disadvantages.

Sign in / Sign up

Export Citation Format

Share Document