Results 181 to 190 of about 4,299 (226)
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Journal of Food Composition and Analysis
Food products have the potential to contain herbicide residues that may pose a threat to human health and the environment, and the determination of these residues at trace levels is extremely important. In this study, a rapid, simple, accurate and environmentally friendly DLLME-QuEChERS method was developed for the sensitive determination of ...
Turak, Fatma +4 more
exaly +4 more sources
Food products have the potential to contain herbicide residues that may pose a threat to human health and the environment, and the determination of these residues at trace levels is extremely important. In this study, a rapid, simple, accurate and environmentally friendly DLLME-QuEChERS method was developed for the sensitive determination of ...
Turak, Fatma +4 more
exaly +4 more sources
Determination of imidacloprid and acetamiprid in bottled juice by a new DLLME-HPLC
Environmental Science and Pollution Research, 2021A new kind of surfactant-emulsified vortex-assisted dispersive liquid-liquid microextraction method (SE-VA-DLLME) using benzyldimethyldodecylammonium chloride (BDDAC) as emulsifier and disperser has been developed for the determination of imidacloprid and acetamiprid in bottled grenadine and black currant juice samples prior to high-performance liquid ...
Janar, Tursen +4 more
openaire +2 more sources
Quantification of steroid hormones in human urine by DLLME and UHPLC-HRMS detection
Journal of Chromatography B, 2020A procedure for the quantification of steroid hormones of various classes in human urine (androgens, estrogens, progestins, corticosteroids) has been described consisting of sample preparation by means of dispersive liquid-liquid extraction after enzymatic hydrolysis with β-glucuronidase from E.
Ekaterina, Dmitrieva +3 more
openaire +2 more sources
La Chimica e l'Industria online, 2018
È stato sviluppato un protocollo DLLME (Dispersive Liquid Micro Liquid Extraction) per la determinazione di 8 benzodiazepine (BDZ) in bevande. Sono stati ottimizzati volume e tipo dei solventi, forza ionica e uso di ultrasuoni ed il protocollo è stato validato ICH.
MAURIZIO PIERGIOVANNI +4 more
openaire +2 more sources
È stato sviluppato un protocollo DLLME (Dispersive Liquid Micro Liquid Extraction) per la determinazione di 8 benzodiazepine (BDZ) in bevande. Sono stati ottimizzati volume e tipo dei solventi, forza ionica e uso di ultrasuoni ed il protocollo è stato validato ICH.
MAURIZIO PIERGIOVANNI +4 more
openaire +2 more sources
DLLME-spectrophotometric determination of glyphosate residue in legumes
Food Chemistry, 2017A new separation and pre-concentration method for spectrophotometric determination of glyphosate herbicide was developed. Glyphosate was converted into dithiocarbamic acid with CS2, followed by copper in the presence of ammonia to promote complex formation. This complex was collected in a CH2Cl2 organic drop and absorbance measured at 435nm.
CETIN, Emine +3 more
openaire +3 more sources
Arabian Journal for Science and Engineering, 2013
The novelty of this work is comparison of three dispersive microextraction methods including DLLME, DLLME-SLW, DLLME-SFO by Taguchi L32 orthogonal array design. For this aim, the above-mentioned dispersive liquid–liquid microextraction methods (followed by gas chromatography) were used for determination of methyl methacrylate in produced water.
Bahram Mokhtari +2 more
openaire +1 more source
The novelty of this work is comparison of three dispersive microextraction methods including DLLME, DLLME-SLW, DLLME-SFO by Taguchi L32 orthogonal array design. For this aim, the above-mentioned dispersive liquid–liquid microextraction methods (followed by gas chromatography) were used for determination of methyl methacrylate in produced water.
Bahram Mokhtari +2 more
openaire +1 more source
Application of DLLME to the Determination of Pyrethroids in Aqueous Samples
Chromatographia, 2010A simple, rapid, sensitive, and environmentally friendly method has been established for the determination of four pyrethroids (fenpropathrin, cyhalothrin, permethrin and tau-fluvalinate) in water samples. The method uses dispersive liquid–liquid microextraction based on solidification of the floating organic droplets (DLLME-SFO) coupled to GC with ...
Lu Liu +4 more
openaire +1 more source
Lead Quantification in Urine Samples of Athletes by Coupling DLLME with UV-Vis Spectrophotometry
Biological Trace Element Research, 2016Urine lead level is one of the most employed measures of lead exposure and risk. The urine samples used in this study were obtained from ten healthy male cyclists. Dispersive liquid-liquid microextraction combined with ultraviolet and visible spectrophotometry was utilized for preconcentration, extraction, and determination of lead in urine samples ...
Hakim Faraji, Masoumeh Helalizadeh
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Science of The Total Environment, 2018
The aim of this study was to optimize the dispersive liquid-liquid microextraction (DLLME) parameters for simultaneous analysis through DLLME-gas chromatography-mass spectrometry (GC-MS) of six iodo-trihalomethanes, four haloacetonitriles, and one halonitromethane, which are residual disinfection products found in drinking water. Eleven disinfection by-
Jiwon, On +2 more
openaire +2 more sources
The aim of this study was to optimize the dispersive liquid-liquid microextraction (DLLME) parameters for simultaneous analysis through DLLME-gas chromatography-mass spectrometry (GC-MS) of six iodo-trihalomethanes, four haloacetonitriles, and one halonitromethane, which are residual disinfection products found in drinking water. Eleven disinfection by-
Jiwon, On +2 more
openaire +2 more sources
Simultaneous determination of six fluoroquinolones in milk by validated QuEChERS-DLLME HPLC-FLD
Anal. Methods, 2014We developed a novel, simple, fast and environmentally friendly extraction method (QuEChERS-DLLME) for the determination of fluoroquinolones in milk samples.
Rouhollah Karami-Osboo +4 more
openaire +1 more source