Optical sensor for the determination of ions

Details Optical sensor for the determination of ions Optical sensor for the determination of ions

G - Physics

01

N

G01N 31/22 (2006.01) C09B 11/22 (2006.01) C09B 15/00 (2006.01) G01N 33/84 (2006.01)

Patent

CA 2183765

A composition comprising (a) a transparent sup- port, (b) which is coated on at least one side with a trans- parent coating which comprises (b1) a plasticizer-free, hydrophobic polymer having a glass transition tempera- ture Tg of from -150 to 50 °C, (b2) counterions in the form of lipophilic salts, (b3) an ionophore which forms a complex with the ion to be determined, and (b4) a com- pound of formula (I) or (II) as fluorophore in which R1 and R3, and R4 and R6 are C1-C30alkyl or C1-C30alkyl- CO-, and R2 and R5 are H or C1-C30alkyl, with the pro- viso that the total number of carbon atoms in the alkyl groups is at least 5, or a salt thereof with an inorganic or organic acid. The composition is highly suitable for the qualitative or quantitative optical determination of ions by means of fluorescence detection.

La présente invention concerne une composition comprenant (a) un support transparent, (b) qui soit revêtue, au moins sur un côté, d'un revêtement transparent comprenant (b1) un polymère hydrophobe sans plastifiant, ayant une température de transition vitreuse Tg comprise entre -150 et 50 DEG C, (b2) des contre-ions sous forme de sels lipophiles, (b3) un ionophore produisant un complexe avec l'ion à mettre en évidence, et (b4) un composé de formule (I) ou (II) en tant que fluorophore, dans lesquelles R1 et R3, ainsi que R4 et R6 sont C1-C30alkyle ou C1-C30alkyle-CO, et R2 et R5 sont H ou C1-C30alkyle, à condition que le nombre total d'atomes de carbone dans les grouples alkyle soit de 5 au monimum, ou un sel dérivé avec un acide inorganique ou organique. La composition en question convient particulièrement pour mettre en évidence des ions par détection en fluorescence.

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