Spectrophotometric Determination of Cr(III) and Pb(II) Using Their Complexes with 5,11,17,23-Tetra[(2-ethyl acetoethoxyphenyl)(azo)phenyl]calix[4]arene

Table 2

Results of simultaneous determination of the analysis of Cr and Pb ions in the plating wastewater (mg/L).

Samples	Content of Cr(III) mg/L		Content of Pb(II) mg/L
	HPSAM	ICP-MS	HPSAM	ICP-MS
A1	1.45 ± 0.12	1.36	1.81 ± 0.19	1.74
A2	0.17 ± 0.02	0.16	0.62 ± 0.06	0.57
A3	0.22 ± 0.02	0.24	0.56 ± 0.06	0.65