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Specific and robust ion chromatographic determination of hypothiocyanite in saliva samples.
- Source :
-
Analytical and bioanalytical chemistry [Anal Bioanal Chem] 2018 Apr; Vol. 410 (11), pp. 2739-2749. Date of Electronic Publication: 2018 Mar 05. - Publication Year :
- 2018
-
Abstract
- The enzymatic system in saliva, consisting of salivary peroxidase (SPO), hydrogen peroxide (H <subscript>2</subscript> O <subscript>2</subscript> ), and thiocyanate (SCN <superscript>-</superscript> ), produces hypothiocyanite (OSCN <superscript>-</superscript> ) as a high effective antibacterial compound. OSCN <superscript>-</superscript> is of great importance for the natural non-specific antibacterial resistance in the oral cavity. However, no analytical method currently exists to selectively quantify OSCN <superscript>-</superscript> in saliva samples. A robust and specific analytical method for the determination of OSCN <superscript>-</superscript> was developed based on ion chromatography with combined UV and electrochemical detection. Calibration was achieved by calculating a derived calibration factor based on the known ratio of molar extinction coefficients of SCN <superscript>-</superscript> and OSCN <superscript>-</superscript> . Thus, the specific quantification of OSCN <superscript>-</superscript> in saliva samples is possible, as demonstrated here. The median value of 200 saliva samples was determined to be 0.56 mg L <superscript>-1</superscript> (median), with a maximum of 3.9 mg L <superscript>-1</superscript> ; the minimum value was below the detection limit (< 0.09 mg L <superscript>-1</superscript> ). The recovery rate in individual saliva samples was 95 ± 8%.
Details
- Language :
- English
- ISSN :
- 1618-2650
- Volume :
- 410
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- Analytical and bioanalytical chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 29508035
- Full Text :
- https://doi.org/10.1007/s00216-018-0954-5