Ultrasonically Modified Amended-Cloud Point Extraction for Simultaneous Pre-Concentration of Neonicotinoid Insecticide Residues

Autor:	Jitlada Vichapong, Supalax Srijaranai, Rodjana Burakham, Yanawath Santaladchaiyakit, Rawikan Kachangoon
Rok vydání:	2018
Předmět:	water samples Insecticides Pharmaceutical Science 02 engineering and technology Chemical Fractionation 01 natural sciences Article Acetamiprid Analytical Chemistry Neonicotinoids chemistry.chemical_compound dual-cloud point extraction high-performance liquid chromatography neonicotinoid insecticides Drug Discovery media_common.cataloged_instance Ultrasonics Physical and Theoretical Chemistry European union Chromatography High Pressure Liquid media_common Residue (complex analysis) Chromatography 010401 analytical chemistry Organic Chemistry Extraction (chemistry) Pesticide Residues Neonicotinoid Clothianidin 021001 nanoscience & nanotechnology Thiacloprid 0104 chemical sciences chemistry Chemistry (miscellaneous) Molecular Medicine Thiamethoxam 0210 nano-technology
Zdroj:	Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry Molecules; Volume 23; Issue 5; Pages: 1165
ISSN:	1420-3049
DOI:	10.3390/molecules23051165
Popis:	An effective pre-concentration method, namely amended-cloud point extraction (CPE), has been developed for the extraction and pre-concentration of neonicotinoid insecticide residues. The studied analytes including clothianidin, imidacloprid, acetamiprid, thiamethoxam and thiacloprid were chosen as a model compound. The amended-CPE procedure included two cloud point processes. Triton™ X-114 was used to extract neonicotinoid residues into the surfactant-rich phase and then the analytes were transferred into an alkaline solution with the help of ultrasound energy. The extracts were then analyzed by high-performance liquid chromatography (HPLC) coupled with a monolithic column. Several factors influencing the extraction efficiency were studied such as kind and concentration of surfactant, type and content of salts, kind and concentration of back extraction agent, and incubation temperature and time. Enrichment factors (EFs) were found in the range of 20–333 folds. The limits of detection of the studied neonicotinoids were in the range of 0.0003–0.002 µg mL−1 which are below the maximum residue limits (MRLs) established by the European Union (EU). Good repeatability was obtained with relative standard deviations lower than 1.92% and 4.54% for retention time (tR) and peak area, respectively. The developed extraction method was successfully applied for the analysis of water samples. No detectable residues of neonicotinoids in the studied samples were found.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::acffb729dc67f09e7cbace27c88867a2 https://doi.org/10.3390/molecules23051165 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.