| Abstract: | A poly(vinyl chloride) matrix membrane sodium selective electrode based on bis[(12-crown-4)ylmethyl] 2-dodecyl-2-methylmalonate ((12-crown-4)yl = 1,4,7,10-tetraoxacyclododecyl) was utilised for the determination of sodium in various foodstuffs such as soup stocks, instant noodle stocks and milk powders. Good agreement was obtained between the proposed electrode and flame photometric methods. Also, the electrode exhibits minimum interference from potassium, calcium, magnesium, iron(III), copper(II) and glucose, and from the synthetic colours tested. |
