K. Benhabib and X. Pierens and V-D Nguyen and G. Mimanne
Speciation Analysis by SolidPhase Microextraction and Application to Atrazine
466 - 469
2018
12
7
International Journal of Environmental and Ecological Engineering
https://publications.waset.org/pdf/10009125
https://publications.waset.org/vol/139
World Academy of Science, Engineering and Technology
The main hypothesis of the dynamics of solid phase microextraction (SPME) is that steadystate mass transfer is respected throughout the SPME extraction process. It considers steadystate diffusion is established in the two phases and fast exchange of the analyte at the solid phase filmwater interface. An improved model is proposed in this paper to handle with the situation when the analyte (atrazine) is in contact with colloid suspensions (carboxylate latex in aqueous solution). A mathematical solution is obtained by substituting the diffusion coefficient by the mean of diffusion coefficient between analyte and carboxylate latex, and also thickness layer by the mean thickness in aqueous solution. This solution provides an equation relating the extracted amount of the analyte to the extraction a little more complicated than previous models. It also gives a better description of experimental observations. Moreover, the rate constant of analyte obtained is in satisfactory agreement with that obtained from the initial curve fitting.
Open Science Index 139, 2018