A Novel Carbon Paste Electrode Modified with N¹-Hydroxy-N¹,N²-Diphenylbenzamidine for the Electrochemical Determination of Cadmium(II) in Environmental Samples

Table 4

Results of determination of Cd(II) in the real samples using the developed method (n = 5) and GFAAS method.

Sample	Added (nM)	SWASV method detected (nM)	SWASV method recovery (%)	GFAAS method detected (nM)	GFAAS method recovery (%)
Wastewater	0	7.94 (±0.13)	—	8.09 (±0.21)	—
	30	39.5 (±0.6)	105.2	39.3 (±0.8)	104.0
Bottled water	0	ND	—	ND	—
	30	30.8 (±0.7)	102.7	31.3 (±0.4)	104.3
Well water	0	ND	—	ND	—
	30	29.8 (±0.5)	99.33	29.6 (±0.7)	98.66
Spring water	0	ND	—	ND	‒
	30	28.8 (±0.2)	96.00	29.5 (±0.4)	98.33
	(ng·g^−1)	(ng·g^−1)		(ng·g^−1)
Tobacco	0	16.1 (±0.2)	—	15.9 (±0.1)	—
	30	47.2 (±1.1)	103.7	46.6 (±1.2)	102.3

ND, not detected.