𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The fluoride ion-selective electrode in flow injection analysis : Part 3. Applications

✍ Scribed by Wolfgang Frenzel; Peter Brätter

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
819 KB
Volume
188
Category
Article
ISSN
0003-2670

No coin nor oath required. For personal study only.

✦ Synopsis

Flow-injection potentiometry with a combination fluoride-selective electrode is used to determine fluoride in tap water, beverages and urme. Excellent sensitivity (down to 1 pg 1-l) and long-term stability are obtained, with a sample throughput of 30-40 h-l, based on triplicate injections at 120 h-l. The commonly used buffer TISAB-III IS unsuitable for the analysis of undiluted tea and urine samples. The apphcation of a modified citrate-containing TISAB overcomes interferences caused by high natural ionic strength and avoids complexation of fluoride. Recoveries after spiking tap water, tea and urine with fluoride concentrations ranging from 0.01 to 1 mg 1-l are in the range 91-106%. The equipment used provides a flexible system allowing fast changes between different buffers and carrier streams depending on the samples presented.

📜 SIMILAR VOLUMES

The fluoride ion-selective electrode in
The fluoride ion-selective electrode in flow injection analysis: Part 1. General Methodology
✍ Wolfgang Frenzel; Peter Brätter 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 631 KB

A simple flow-injection system for determination of traces of fluoride by means of the fluoride-selective electrode is presented. A comparison of several flow-cell arrangements confirmed the advantages of a wall-jet design. Systematic investigations of the parameters affecting response times (i.e.,

Photo-cured polymers in ion-selective el
Photo-cured polymers in ion-selective electrode membranes : Part 3. A Potassium Electrode for Flow Injection Analysis
✍ T.J. Cardwell; R.W. Cattrall; P.J. Iles; I.C. Hamilton 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 245 KB

The preparation of a potassium-selective electrode based on a photo-cured polymer membrane containing valinomycin is reported. This electrode has similar response characteristics to one based on PVC with the same neutral carrier. It is suitable for use in flow-injection systems because of its fast i

Flow-through calcium-selective electrode
Flow-through calcium-selective electrode: application in flow-injection analysis and ion chromatography
✍ N. Kolycheva; H. Müller 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 565 KB

The use of solid contact flow-through calcium-selective electrodes as potentiometric detectors in flow-injection analysis and non-suppressed ion chromatography is discussed. Owing to the high selectivity of the membrane electrode based on tetratolyl-m-xylylenediphosphine dioxide, it can be used to m

Segmental flow injection with ion-select
Segmental flow injection with ion-selective electrodes for the determination of fluoride in water
✍ J.A. Borzitsky; A.V. Dvinin; O.M. Petrukhin; Yu.I. Urusov 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 328 KB

A flow analyser with enhanced samplmg frequency combmmg the features of flow-nuectlon and contmuous-flow analysis IS described Parameters of the analyser were optnmzed to ensure the highest rate of analysis allowed by the bubble-through flow cell wth fluoride-selectnre electrodes Fluonde was determm

Ammonium detection using an ion-selectiv
Ammonium detection using an ion-selective electrode array in flow-injection analysis
✍ F. J. Sáez de Viteri; Dermot Diamond 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 812 KB

An ammonium detection system using ion-selective electrodes (ISEs) in flow-injection analysis (FIA) is described. Because of the low selectivity of the nonactin ammonium selective electrode toward some common ions, notably potassium, different selectivity enhancement techniques have been examined. A