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Determination of phthalate esters in cleaning and personal care products by dispersive liquid-liquid microextraction and liquid chromatography-tandem mass spectrometry.
Phthalic acid esters (PEs) were preconcentrated from cleaning products, detergents and cosmetics using ultrasound assisted extraction (UAE) in the presence of acetonitrile, and then submitted toExpand
Determination of spirocyclic tetronic/tetramic acid derivatives and neonicotinoid insecticides in fruits and vegetables by liquid chromatography and mass spectrometry after dispersive liquid-liquid
TLDR
Dispersive liquid-liquid microextraction was used to preconcentrate three spirocyclic tetronic/tetramic acid derivatives and five neonicotinoid insecticides previously extracted from fruit and vegetable matrices with acetonitrile, finding only thiamethoxam was detected in a lemon sample at a concentration close to the quantification limit. Expand
Pressurized liquid extraction and dispersive liquid-liquid microextraction for determination of tocopherols and tocotrienols in plant foods by liquid chromatography with fluorescence and atmospheric
TLDR
Pressurized liquid extraction and dispersive liquid-liquid microextraction were used to isolate and preconcentrate tocopherols and tocotrienols from plant foods to correct identification of compounds in the vegetable and fruit samples. Expand
Magnetic solid phase extraction with CoFe2O4/oleic acid nanoparticles coupled to gas chromatography-mass spectrometry for the determination of alkylphenols in baby foods.
TLDR
Magnetic solid phase extraction (MSPE) with cobalt ferrite nanoparticles coated with oleic acid is described for the determination of alkylphenols (APs) in baby foods using gas chromatography with mass spectrometry (GC-MS). Expand
Determination of nitrophenols in environmental samples using stir bar sorptive extraction coupled to thermal desorption gas chromatography-mass spectrometry.
This paper presents a procedure for the determination of seven nitrophenols (NPs) in water and soil samples using stir bar sorptive extraction (SBSE) coupled to gas chromatography with massExpand
Magnetic carbon nanotube composite for the preconcentration of parabens from water and urine samples using dispersive solid phase extraction.
TLDR
This study describes the use of a magnetic multi-walled carbon nanotube composite for the preconcentration of nine parabens from water and urine samples after in situ acetylation. Expand
Capillary liquid chromatography combined with pressurized liquid extraction and dispersive liquid-liquid microextraction for the determination of vitamin E in cosmetic products.
TLDR
Capillary liquid chromatography is used for the determination of tocopherols and tocotrienols in cosmetic products and the Taguchi experimental method was used to optimize the factors affecting DLLME. Expand
Dispersive liquid-liquid microextraction for the determination of new generation pesticides in soils by liquid chromatography and tandem mass spectrometry.
TLDR
A sensitive method for the determination of five new generation pesticides in soil samples has been developed using liquid chromatography and tandem mass spectrometry (LC-MS(2) with a triple-quadrupole in the multiple reaction monitoring mode. Expand
Combination of solvent extractants for dispersive liquid-liquid microextraction of fungicides from water and fruit samples by liquid chromatography with tandem mass spectrometry.
TLDR
The approach was most sensitive for metominostrobin with limits of quantification of 1ngL-1 and 5ngkg-1 in waters and fruits, respectively, while a similar sensitivity was attained for tebuconazole in fruits. Expand
A study of the influence on diabetes of free and conjugated bisphenol A concentrations in urine: Development of a simple microextraction procedure using gas chromatography-mass spectrometry.
TLDR
A comparison of the BPA content for both groups of patients revealed that slightly higher mean values were obtained for both free BPA and total BPA for diabetic patients, than for non-diabetic patients, however, a statistical comparison ofThe contents of BPA revealed that there were no significant differences. Expand
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