Gold–Copper Film Electrode for Voltammetry Determination of Mercury in Water

Table 6

Influence of Fe(III), Ca(II), and Cu(II) on the of Hg.

Fe(III)	(mg/L)	0	2	2.5	3	3.5	4
	(μA)	1.7	1.8	1.9	2.0	2.1	2.1
	RSD (%, )	—	1.9	0	0.5	1.3	3.0
	(%)	—	5.9	11.8	17.6	23.5	23.5
Cu(II)	(mg/L)	0	0.01	0.02	0.03	0.04	0.05
	(μA)	1.2	1.1	1.1	1.0	1.0	1.0
	RSD (%, )	2.6	2.1	1.8	2.6	4.1	2.4
	(%)	0	8.3	8.3	16.7	16.7	16.7
Ca(II)	(mg/L)	0	40	80	120	160	200
	(μA)	1.7	1.7	1.7	1.8	2.1	2.1
	RSD (%, )	0.7	2.2	1.5	3.7	5.8	0.7
	(%)	0	0	0	5.9	23.5	23.5

Conditions:  μg/L; other conditions as in Figure 1.