Dissolved sulfide ions are separated and detected by using ion chromatography (IC) and electrochemical detection with a glassy carbon electrode modified by electrochemical deposition of palladium particles. The influence of various experimental factors such as pH, loading of palladium, applied potential and flow rate of mobile phase is evaluated. The effect of some common organic and inorganic compounds on the amperometric signal is also evaluated. Under optimal chromatographic conditions, the detection limit for sulfide (S/N=3) was 0.3μM (15pmol injected) and the calibration plot was linear for 0.5–350μM sulfide (r=0.9964, n=16). The separation and detection of sulfides in human blood serum is presented as an example of an application to real specimens.
|Titolo:||Sulfide measurements by flow injection analysis and ion chromatography with electrochemical detection|
|Autori interni:||DESIMONI, ELIO (Ultimo)|
|Parole Chiave:||Electrochemical detection; Flow injection analysis; Ion chromatography; Sulfide measurements|
|Settore Scientifico Disciplinare:||Settore CHIM/01 - Chimica Analitica|
|Data di pubblicazione:||2000|
|Digital Object Identifier (DOI):||10.1016/S0003-2670(99)00769-2|
|Appare nelle tipologie:||01 - Articolo su periodico|