Determination of N-methylcarbamate insecticides in water samples using dispersive liquid–liquid microextraction and HPLC with the aid of experimental design and desirability function

2011 ◽  
Vol 699 (1) ◽  
pp. 113-119 ◽  
Author(s):  
Saeid Khodadoust ◽  
Mohammadreza Hadjmohammadi
Keyword(s):  
Experimental Design ◽  
Water Samples ◽  
Desirability Function ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Simultaneous determination of cationic dyes in water samples with dispersive liquid–liquid microextraction followed by spectrophotometry: experimental design methodology

2016 ◽  
Vol 40 (5) ◽  
pp. 4793-4802 ◽  
Author(s):  
Arash Asfaram ◽  
Mehrorang Ghaedi
Keyword(s):  
Experimental Design ◽  
Simultaneous Determination ◽  
Water Samples ◽  
Design Methodology ◽  
Cationic Dyes ◽  
Dispersive Liquid Liquid Microextraction ◽  
Experimental Design Methodology ◽  
Liquid Microextraction

Dispersive liquid–liquid microextraction (DLLME) combined with spectrophotometry was applied to the determination of two dyes in water samples.

scholarly journals Experimental design approaches to optimize ultrasound-assisted simultaneous-silylation dispersive liquid–liquid microextraction for the rapid determination of parabens in water samples

RSC Advances ◽  
2021 ◽  
Vol 11 (38) ◽  
pp. 23607-23615
Author(s):  
Chi-Zhong Hsieh ◽  
Wu-Hsun Chung ◽  
Wang-Hsien Ding
Keyword(s):  
Surface Water ◽  
Experimental Design ◽  
Water Samples ◽  
Rapid Determination ◽  
Methyl Ethyl ◽  
Ultrasound Assisted ◽  
Dispersive Liquid Liquid Microextraction ◽  
Surface Water Samples ◽  
Liquid Microextraction

This work describes a rapid solvent-minimized process to effectively determine four common paraben preservatives (methyl-, ethyl-, propyl- and butyl-paraben) in surface water samples.

Determination of Some Organophosphorus and Azole Group Pesticides in Water Samples by Dispersive Liquid–Liquid Microextraction Coupled with GC/MS

2011 ◽  
Vol 94 (6) ◽  
pp. 1882-1890 ◽  
Author(s):  
Abdullah Akdoğan ◽  
Ümit Divrikli ◽  
Andlatif Elçi
Keyword(s):  
Experimental Design ◽  
Water Samples ◽  
Sample Volume ◽  
Aqueous Sample ◽  
Experimental Conditions ◽  
Extraction Solvent ◽  
Pesticides In Water ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Abstract A dispersive liquid–liquid microextraction (DLLME) procedure coupled with GC/MS detection is described for preconcentration and determination of some organophosphorus and azole group pesticides from water samples. Experimental conditions affecting the DLLME procedure were optimized by means of an experimental design. A mixture of 60 μL chlorobenzene (extraction solvent) and 750 μL acetonitrile (disperser solvent), 3.5 min extraction time, and 7.5 mL aqueous sample volume were chosen for the best recovery by DLLME. The linear range was 1.6–32 μg/L. The LOD ranged from 48.8 to 68.7 ng/L. The RSD values for organophosphorus and azole group pesticides at spiking levels of 3, 6, and 9 μg/L in water samples were in the range of 1.1 – 12.8%. The applicability and accuracy of the developed method were determined by analysis of spiked water samples, and the recoveries of the analyzed pesticides from artesian, stream, and tap waters at spiking levels of 3, 6, and 9 μg/L were 89.3–105.6, 89.5–103.0, and 92.0–111.3%, respectively.

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