Free Access
Volume 28, Number 4, June 2000
MS for the study of natural mechanisms
Page(s) 302 - 307
Section Original articles
Analusis 28, 302-307 (2000)
DOI: 10.1051/analusis:2000119

Determination of residual sodium content in silver and silver oxide composite materials

R. 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