EVALUATION OF SOME IMMOBILIZED ROOM-TEMPERATURE PHOSPHORESCENT METAL-CHELATES AS SENSING MATERIALS FOR OXYGEN

被引：46

作者：

LIU, YM ^{[1
]}

PEREIROGARCIA, R ^{[1
]}

VALENCIAGONZALEZ, MJ ^{[1
]}

DIAZGARCIA, ME ^{[1
]}

SANZMEDEL, A ^{[1
]}

机构：

[1] UNIV OVIEDO,FAC CHEM,DEPT PHY & ANALYT CHEM,E-33006 OVIEDO,SPAIN

来源：

ANALYTICAL CHEMISTRY | 1994年 / 66卷 / 06期

关键词：

D O I：

10.1021/ac00078a013

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

8-Hydroxy-7-iodo-5-quinolinesulfonic acid (ferron) chelates of some transition metals (including AI(III), Zr(IV), Ga(III), and Nb(V)), when retained on the surface of anion-exchange resin beads, exhibit strong phosphorescence at room temperature (RTP) in suspensions of aqueous and organic solutions or encapsulated in silicone rubber films. An oxygen transducer based on RTP quenching measurements of the Al-ferron chelate has been evaluated. The immobilized RTP metal chelate proved to be photochemically very stable, and its RTP emission is highly sensitive toward oxygen. A detection limit of 0.1% (v/v) of oxygen in argon was found. Typical response times were less than 5 s for full signal change using naked sensing beads and ca. 20 s for gaseous mixtures and 2.5 min for solution samples when the sensing beads were embedded in a silicone film. The method has been successfully tested for dissolved oxygen determinations in tap waters.

引用

页码：836 / 840

页数：5

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