Applications of polydimethylsiloxane in analytical chemistry: A review

Stir-bar sorptive extraction: 15 years making sample preparation more environment-friendly

“…This non-polar polymeric phase promotes hydrophobic interactions with the target molecules, and the retention mechanism occurs mainly through Van-der-Waals forces, although hydrogen bonds can occur with the oxygen atoms of the PDMS, depending on the chemical structure of the analytes involved. PDMS has interesting diffusion and thermo-stable properties, allowing it to operate over a wide range of temperatures [14]. For this reason, this solventless approach was first proposed to be associated with thermal desorption (TD) following gas chromatography (GC) analysis.…”

Improvements in pollutant monitoring: Optimizing silicone for co-deployment with polyethylene passive sampling devices

“…Many benefits of passive sampling are practical, whether it is cost, ease of use over grab samples, concentrated extracts over diffuse matrices, or time-weighted averages over the deployment period (Namieśnik et al, 2005; Vrana et al, 2005; Zabiegala et al, 2010; Seethapathy and Gorecki, 2012). Another important benefit is that passive sampling concentrations represent bioavailable contaminants in the sample media (Anderson and Hillwalker, 2008).…”

“…Explaining sequestration differences between LDPE and silicone begin with the structural make-up of each polymer. Silicone is made of a silicon-oxygen backbone with various functional groups bonded to silicon such as methyl, phenyl, vinyl, or fluoro constituents (Rusina et al, 2007; Seethapathy and Gorecki, 2012). In contrast, LDPE consists of carbon and hydrogen (Rusina et al, 2007), which gives this polymer a more hydrophobic property.…”

Development of a polydimethylsiloxane–thymol/nitroprusside composite based sensor involving thymol derivatization for ammonium monitoring in water samples

“…For this aim, we have used PDMS owing to its advantageous properties as polymeric matrix such as optically clear, hydrophobic, non-toxic and chemically inert; thus, it can be used to encapsulate several compounds (Campins-Falcó et al, 2013;Jo and Guldiken, 2014). Moreover, PDMS as sensing phase for sensors based on spectroscopic techniques have been previously reported (Seethapathy and Gorecki, 2012;Albuquerque et al, 2005). In this case thymol and nitroprusside have been successfully entrapped inside the PDMS matrix.…”