Burns et al. [34,35] and others [36,37] have been successfully used the compound amiloride mono hydrochloride (Fig. 1) as a selective analytical ion-pair reagent for the determination of the oxoanions perchlorate, perrhenate and periodate in different
matrixes. The extraction of the produced complex ion associates of amiloride with these oxoanions proceeded rapidly with high recovery factor [27–31].