A submicron mesoporous silica for the determination of organosulphur in sea water
| Autor: | Awad Aqeel Al-rashdi |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Detection limit
Gas chromatography Reproducibility lcsh:QD71-142 Chromatography Octyl-diol mesoporous silica Solid phase dispersion Chemistry Extraction (chemistry) lcsh:Analytical chemistry Organosulphur compounds Repeatability Mesoporous silica Biochemistry Seawater samples Analytical Chemistry Seawater Dispersion (chemistry) |
| Zdroj: | Analytical Chemistry Research, Vol 4, Iss C, Pp 25-32 (2015) |
| ISSN: | 2214-1812 |
| Popis: | Organosulphur compounds were determined in seawater samples by gas chromatography using a pulse flame detection method. The analytical method involved the use of octyl-diol mesoporous silica as a replacement for organic solvents in the extraction and pre-concentration of organosulphur compounds from seawater samples based on the solid phase dispersion extraction technique. The detection limits were in the range 0.6–2 ng S/L, while the repeatability and reproducibility were 7–12% and 13–16% respectively. Relative standard deviations (%) for recovery of n-ethanthiol (n-EtSH), di-n-ethyl sulphide (n-Et 2 S) and di-n-ethyl disulphide (n-Et 2 S 2 ) in spiked water samples were in the range 2.2–6.6% (at 0.5 μg/L level). Under the experimental conditions used, quantitative extraction of n-EtSH, n-Et 2 S and n-Et 2 S 2 was achieved with recoveries ranging from 93% to 99%. The procedure has been successfully applied to organosulphur determination in seawater samples collected from Jeddah beach (West of Saudi Arabia). |
| Databáze: | OpenAIRE |
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