Interfering compounds	Concentration in g/L of the interfering added	% change in peak current density in DPV (with J_PCM = 100%)
(K⁺, $N O_{3}^{-}$ )	0.124	−1.38
	0.248	+3.13
	0.369	−0.29
	0.490	+0.50
	0.610	−4.04
	1.19	+0.12
	2.27	+0.37
(K⁺, Cl⁻)	0.124	−2.42
	0.248	−2.17
	0.369	−4.68
	0.490	+5.06
	0.610	+4.06
	1.19	+0.97
	2.27	+4.99
(2K⁺, $S O_{4}^{2 -}$ )	0.124	−3.02
	0.248	−0.71
	0.369	+1.77
	0.490	+0.577
	0.610	+3.88
	1.19	+3.75
	2.27	+0.46
(2K⁺, $H P O_{4}^{2 -}$ )	0.124	−0.77
	0.248	−4.74
	0.369	−5.26
	0.490	−5.07
	0.610	−5.45
	1.19	−5.04
	2.27	−4.03