Volume 28, Number 4, June 2000MS for the study of natural mechanisms
|Page(s)||302 - 307|
Determination of residual sodium content in silver and silver oxide composite materialsR. Vivier1, L. Muhr2, H. Muhr2 and E. Plasari2
1 Schneider Electric SA, 33 bis, avenue du Maréchal Joffre, 92002 Nanterre Cedex, France
2 LSGC/CNRS - ENSIC/INPL, 1, rue Grandville, BP 451, 54001 Nancy Cedex, France
(Received December 6, 1999; revised June 15, 2000; accepted July 4, 2000.)
The presence of silver ions deforms strongly the linear response for sodium determination by flame spectrophotometry. Relative errors up to 60% can be obtained if linear instead of non-linear relations are used. A correction function is defined and a method based on mathematical considerations is proposed for elimination of interference in determination of sodium concentration.
Key words: Sodium content -- impurity -- silver -- metal oxide -- matrix effect -- flame spectrophotometer.
© EDP Sciences, Wiley-VCH 2000