Naslov
Silver Sensitive Optrode Membrane Based on Lipophilic Acridine Dye

Autori
I. Murkovic, O. S. Wolfbeis

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
8. Österreichischen Chemietage/ 5th Vienna Opt(r)ode Workshop / - , 1994

Skup
8. Österreichischen Chemietage / 5th Vienna Opt(r)ode Workshop

Mjesto i datum
Graz, Austrija, München, Njemačka, 1994

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
silver sensor; optical sensors; chromo-ionophore; spectrophotometry; PVC membrane

Sažetak
An optical sensor (optode) membrane for continuous monitoring of silver ion is presented. It is composed of plasticized poly(vinyl chloride) (PVC), a silver-sensitive chromo-ionophore, and a lipophilic berate salt acting as an anionic site. The membrane selectively responds to silver ion in the concentration range from 50 mu M to 10 mM, giving a reversible colour change from blue to pink, with response times of the order of 2 min. The acridinium dye acts as both the recognition element and the chromo-ionophore. Its long-wave absorption band is at around 680 nm, which makes it compatible with existing LED light sources and diode lasers. A lipophilic octadecyl side chain renders it highly lipophilic and this prevents its leakage out of the PVC membrane. Hence, the operational lifetime exceeds 1 week, without any changes in the work function.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA