Determination of ammonium in a buddingtonite sample by ion-chromatography
Talanta
By: P.R. Klock and P. J. Lamothe
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Abstract
An ion-chromatographic method for the direct determination of ammonium, potassium, and sodium in geologic materials is described. Samples are decomposed with a mixture of hydrofluoric and hydrochloric acids in a sealed polycarbonate bottle heated in a microwave oven. The ion-chromatograph separates the cations and determines them by conductivity measurement. The ammonium concentrations thus determined have been verified by use of an ammonia-specific electrode. A total of 32 analyses of ammonium salts by both techniques showed an average error of -4%, with a relative standard deviation (RSD) of 6%. The ammonium concentrations found in a buddingtonite sample had an RSD of 2.2% and their mean agreed with that obtained by the Kjeldahl method. By use of the prescribed dilution of the sample, detection limits of 0.1% can be achieved for all three cations. ?? 1986.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Determination of ammonium in a buddingtonite sample by ion-chromatography |
| Series title | Talanta |
| Volume | 33 |
| Issue | 6 |
| Year Published | 1986 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Talanta |
| First page | 495 |
| Last page | 498 |
| Google Analytic Metrics | Metrics page |