Elimination of metal interference in the determination of fluoride ion by non-suppressor type ion chromatography
A simple method has been developed to eliminate metal interferences in the ion-chromatographic determination of fluoride ion in aqueous solutions. Negative interferences become appreciable on 0.2-mM F at 0.01 to 0.02 mM of Al(III), Ce(IV), La(III), Y(III), Ce(III) and Pb(II); and at 0.25 mM of Ca(II...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis
1996
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| Online Access: | http://psasir.upm.edu.my/id/eprint/42348/1/Elimination%20of%20metal%20interference%20in%20the%20determination%20of%20fluoride%20ion%20by%20non-suppressor%20type%20ion%20chromatography.pdf http://psasir.upm.edu.my/id/eprint/42348/ http://www.tandfonline.com/doi/abs/10.1080/03067319608028133 |
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| Summary: | A simple method has been developed to eliminate metal interferences in the ion-chromatographic determination of fluoride ion in aqueous solutions. Negative interferences become appreciable on 0.2-mM F at 0.01 to 0.02 mM of Al(III), Ce(IV), La(III), Y(III), Ce(III) and Pb(II); and at 0.25 mM of Ca(II). The interference from Cd(II), Co(II), Fe(II) and Ni(II) is insignificant at ≤ 5.0-mM metal for 5.0-mM F-. By alkalifying F- solutions at pH 12.3, the metal interference can be eliminated up to the concentrations of 0.25-mM Al(III), La(III) and Y(III); 1.0-mM Ce(IV); 2.5-mM Ce(III); and 5.0-mM Pb(II), Cd(II), Co(II), Fe(II) and Ni(II). The Ca(II) interference cannot be eliminated. The pretreatment enables determination of 0.2- to 5.0-mM F- in presence of 0.25-mM Al(III) or La(III) with coefficient-of-variations of 1.99 to 6.20%. |
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