Methods and sensors for detecting or measuring an acid or base

Details Methods and sensors for detecting or measuring an acid or base Methods and sensors for detecting or measuring an acid or base

G - Physics

01

N

G01N 21/41 (2006.01) G01N 21/77 (2006.01)

Patent

CA 2348503

The invention relates to a method and sensors for measuring the concentration of an acid or base or the pH in an environment. The sensor is composed of an index of refraction transducer having at its outer surface at least one compound with at least one functional group of a Lewis acid, a Lewis base, a Bronsted acid, a Bronsted base, or a combination thereof, with the provisos that (i) the compound does not undergo a color change when contacted with the acid or base, and (ii) when there are naturally occurring functional groups, no transducer attached compounds, and exactly one overlayer, then the overlayer is not poly(vinyl alcohol).

L'invention se rapporte à un procédé et à des capteurs permettant de mesurer la concentration d'un acide ou d'une base ou le pH dans un environnement. Ledit capteur est composé d'un transducteur d'indice de réfraction présentant sur sa surface externe au moins un composé comportant au moins un groupe fonctionnel d'un acide de Lewis, d'une base de Lewis, d'un acide de Brönsted, d'une base de Brönsted ou d'une combinaison de ces derniers, à condition que (i) le composé ne subisse pas de changement de couleur lorsqu'il est mis en contact avec l'acide ou la base, et que (ii) lorsqu'il existe des groupes fonctionnels d'origine naturelle, aucun composé fixé au transducteur et une seule couche sus-jacente, alors ladite couche sus-jacente n'est pas composée de poly(alcool vinylique).

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