M. Shamsipur et al., The synthesis of 1,4-diaza-2,3;8,9-dibenzo-7,10-dioxacyclododecane-5,12-dione and its use in calcium-selective carbon paste electrodes, J INCL P MA, 40(4), 2001, pp. 303-307
Citations number
36
Categorie Soggetti
Chemistry
Journal title
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
A synthetic procedure has been developed for the preparation of 1,4-diaza-2
,3;8,9-dibenzo-7,10-dioxacyclododecane-5,12-dione. A carbon paste electrode
based on the new macrocyclic diamide was constructed for Ca2+ determinatio
n. The calibration graph was linear over a wide concentration range (1.3 x
10(-6)-3.2 x 10(-3) M) with a near Nernstian slope of 32 mV decade(-1). The
limit of detection is 7.9 x 10(-7) M (0.032 ppm). Selectivity coefficients
were tabulated and the working pH range was determined. It has a fast resp
onse time of < 10 s and can be used for at least 3 months without any consi
derable divergence in potentials. The electrode was successfully applied to
the determination of Ca2+ ions in a pharmaceutical preparation.