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Sen, B. (1957) Indirect complexometric titration of sodium and potassium with EDTA. Fresenius’ Zeitschrift für Analytische Chemie, 157, 2-6.

has been cited by the following article:

• TITLE: Novel method for determination of sodium in foods by thermometric endpoint titrimetry (TET)

  AUTHORS: Thomas Smith, Christian Haider

  KEYWORDS: Sodium; Titration; Food; Foodstuffs; TET; Thermometric Endpoint Titration; Elpasolite

  JOURNAL NAME: Journal of Agricultural Chemistry and Environment, Vol.3 No.1B, January 16, 2014

  ABSTRACT: A novel yet simple, rapid and robust thermometric endpoint titration (TET) method for the determination of sodium in various foodstuffs is described. Sodium reacts exothermically with aluminium in the presence of an excess of potassium and fluoride ions to form NaK2AlF6 (“elpasolite”). This reaction forms the basis of a ro- bust, reliable analytical procedure suitable for routine process control. The reaction of calcium under similar conditions (to form KCaAlF6) suggests that potentially, calcium may interfere in the determination of sodium in some foodstuffs. Results of an investigation suggest that at molar ratios [Ca]/[Na]