Semi-xylenol orange complex of zirconium(IV) as a photometric reagent system for fluoride based on mixed ligand complex formation
| Autor: | Akio Yuchi, Norihisa Hokari, Genkichi Nakagawa, Hiroko Wada |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1993 |
| Předmět: |
Detection limit
Zirconium Xylenol orange medicine.diagnostic_test Potentiometric titration Inorganic chemistry chemistry.chemical_element Biochemistry Analytical Chemistry Absorbance chemistry.chemical_compound chemistry Reagent Spectrophotometry Electrochemistry medicine Environmental Chemistry Fluoride Spectroscopy |
| Zdroj: | Analyst. 118(2):219-222 |
| ISSN: | 0003-2654 |
| Popis: | An equimolar mixture of zirconium(IV) and Semi-Xylenol Orange (SXO) reacts rapidly with fluoride ion at pH2 to cause an increase in absorbance at about 530 nm. The calibration graph was linear up to 1 × 10–5 mol dm–3. In a flow injection system, a detection limit (signal-to-noise ratio = 3) of 2.5 × 10–7 mol dm–3 was obtained with a sample throughout of 60 h–1. Potentiometric studies of this reaction system with a fluoride ion-selective electrode demonstrated that an increase in absorbance can be ascribed to the coordination of the phenolic oxygen of SXO on the reaction of a partly hydrolysed Zr–SXO complex with fluoride ion to give the mixed ligand complex. |
| Databáze: | OpenAIRE |
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