Application of Ultrasound-Assisted Emulsification Microextraction Based on Applying Low Density Organic Solvents to the Extraction and Determination of Mononitrotoluenes in Water Samples
AUTOR(ES)
Bahmaei, Manoochehr, Mashayekhi, Hossein Ali, Khalilian, Faezeh
FONTE
J. Braz. Chem. Soc.
DATA DE PUBLICAÇÃO
2015-07
RESUMO
In this study, simple and efficient ultrasound-assisted emulsification microextraction (USAEME) based on applying low density organic solvents combined with gas chromatography-flame ionization detector (GC-FID) was developed for the preconcentration and determination of mononitrotoluenes (MNTs) in water samples. In this method, the fine droplets of toluene were formed and dispersed in the sample with the help of ultrasonic waves which accelerated the formation of the fine cloudy solution without using disperser solvents. Several factors influencing the extraction efficiency such as the nature and volume of organic solvent, extraction temperature, ionic strength and centrifugation time were investigated and optimized. Using optimum extraction conditions, dynamic linear ranges of 0.5-500 μg L-1, and limit of detections (LOD) of 0.3 μg L-1 were obtained for o-nitrotoluene, m-nitrotoluene and p-nitrotoluene. Finally, the method was successfully applied to the extraction and determination of MNTs in the water samples in the range of micrograms
Documentos Relacionados
- Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace cadmium in water samples by flame atomic absorption spectrometry
- Ultrasound-assisted surfactant-enhanced emulsification microextraction combined with hplc for the determination of estrogens in water
- Development of Manual Shaking and Ultrasound-Assisted Surfactant-Enhanced Emulsification Microextraction for Analysis of Organophosphorus Pesticides in Aqueous Samples
- Alternative analytical method for metal determination in inorganic fertilizers based on ultrasound-assisted extraction
- Ultrasound-assisted treatment of coconut water samples for potentiometric stripping determination of zinc