Voltammetric use of a graphite electrode modified with OV-17 silicone for the determination of organic compounds

✍ Scribed by Pedro Hernández; Susana García; Lucas Hernández

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 519 KB
• Volume: 259
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(92)85383-h

✦ Synopsis

AbStlllCt

The use of a grapkute electrode mochfied with OV-17 s&one (a stationary phase matenal used m gas chromatograpluc columns) IS described The procedure IS based on preconcentration of the compounds to be assessed m an open cmzmt m Bntton-Robmson buffer (pH 4) urlth mechanical s~mg (550 rpm) and uses a moddied electrode at a sdicone to graphite ratio of 40 60 and a lo-mm accumulation tune Measurements are performed m Bnttton-Robmson buffer (pH 7) usmg dlfferentd-pulse voltammetry with a scan rate of 7 5 mV s-l and a pulse amplitude of 100 mV Under these expenmental conditions, a detectIon lmut for benomyl of 6 9 ng ml-' can be achieved with a relative error of 6%