Abstract
This paper describes for the first time the extraction followed by thermal desorption of polycyclic aromatic hydrocarbons (PAHs) spiked water samples in a microfluidic silicon device. Thanks to the integration into an original system composed of a micropump, microvalves, and an optimized thermal management, the entire protocol is automated and combines the extraction, the drying and the desorption in less than 25 min before sending the sample to a GC-FID system. Repeatable recovery yields have been determined for 1 μg/L spiked water samples and the analysis of PAHs in a natural water spiked sample has been demonstrated without loss of performance compared to purified water samples. Compared to other extraction techniques, this system has the advantage of reduced footprint, reduced energy consumption and no solvent use.
Highlights
Polycyclic aromatic hydrocarbons (PAHs) are known to present toxic, mutagenic and carcinogenic effects
Repeatable recovery yields have been determined for 1 μg/L spiked water samples and the analysis of polycyclic aromatic hydrocarbons (PAHs) in a natural water spiked sample has been demonstrated without loss of performance compared to purified water samples
In our previous studies we have shown that our microfluidic chips could extract efficiently within 20 min PAHs contains in 10 mL water samples, either by using PDMS extraction phase or SiOCH extraction phase [21] [22]
Summary
Polycyclic aromatic hydrocarbons (PAHs) are known to present toxic, mutagenic and carcinogenic effects They are ubiquitous present in the environment because of human activity [1]. A lot of developments are still in progress to improve the sensitivity or the through-put of such methods, either by working on the development of more efficient matrices for the extraction [8] [9] or by introducing new methodologies [10]-[14]. The automation of such analyzes is investigated, yet it remains expensive, cumbersome and time-consuming
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