| Title: | Modification of hydrophobic sorbents by cobalt chloride in order to concentrate low molecular polar organic substances from the air for subsequent gas chromatographic determination |
| Author(s): | Rodinkov OV; Zhuravleva GA; Bugaichenko AS; Viktorova MI; Postnov VN; Novikov AG; |
| Address: | "Saint Petersburg State University, Institute of Chemistry, Russian Federation. Saint Petersburg State University, Institute of Chemistry, Russian Federation. Electronic address: alexandrastepanjuk@gmail.com" |
| DOI: | 10.1016/j.talanta.2015.04.069 |
| ISSN/ISBN: | 1873-3573 (Electronic) 0039-9140 (Linking) |
| Abstract: | "The article presents a new method of modification of hydrophobic sorbents. To improve sorption pre-concentration of polar organic compounds in the air analysis, these sorbents are coated with cobalt chloride. This modification increases retention volume of lower alcohols by 5-10 fold as compared to that of unmodified sorbents and solves the problem of gas-chromatographic determination at 1-2 ppb (micrograms/m(3)) by using the most common flame ionization detector. It should be noted that the modification of hydrophobic sorbents by cobalt chloride has little influence on their porosimetry parameters (specific surface area, proportions of meso- and micropores) and modified sorbents are capable of retaining hydrophobic nonpolar and weakly polar analytes as well as original unmodified sorbents. Thus, a fairly simple procedure leads to a large positive effect" |
| Keywords: | Air analysis Cobalt chloride Pre-concentration Sorbents Surface-layer polytetrafluoroethylene (PTFE) Volatile organic compounds; |
| Notes: | "PubMed-not-MEDLINERodinkov, O V Zhuravleva, G A Bugaichenko, A S Viktorova, M I Postnov, V N Novikov, A G eng Netherlands 2015/10/11 Talanta. 2015 Nov 1; 144:427-31. doi: 10.1016/j.talanta.2015.04.069. Epub 2015 Apr 30" |
