Ionic optodes: role in fiber optic chemical sensor technology

Langry, Kevin C.; Rambabu, B.

doi:10.1002/(sici)1097-4660(199908)74:8<717::aid-jctb105>3.0.co;2-w

Cited by 5 publications

(1 citation statement)

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“…Since geometry plays such an important role in ion-binding, the structural complexity of selective ionophores for anions tends to be greater, in general, than for cations. 14 The facts that acridinium derivatives are used as ionophores in construction of optical sensors 15 and pyridinium derivatives form stable complexes 16,17 with CrO 4 2and Cr 2 O 7 2-, suggests that an acridinium based membrane would effectively interact towards Cr(VI) anions. In this paper, a new, simple, sensitive and reproducible electrode with a PVC based membrane is described for the determination of Cr(VI) anions.…”

Section: Introductionmentioning

confidence: 99%

Determination of Cr(VI) with Selective Sensing of Cr(VI) Anions by a PVC‐Membrane Electrode Based on Quinaldine Red

Yari

Bagheri

2009

J Chinese Chemical Soc

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A dichromate-selective PVC-membrane electrode based on Quinaldine Red (an acridinium derivative) is described. The electrode exhibits rapid (< 30 s) and linear response to the activity of Cr(VI) anions in the range of 5.2´10-6 -1.0´10 -1 M dichromate with the limit of detection 2.5´10 -6 M of Cr 2 O 7 2-. The sensor is used as an indicator electrode in potentiometric determination of Cr(VI) anions and is also suitable for end-point indication in the titrations of proper metal ions with dichromate under laboratory conditions. The proposed electrode has been applied to the direct potentiometric determination of Cr(VI) anions in water samples with satisfactory results.

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Section: Introductionmentioning

confidence: 99%