Modification of Nanoclinoptilolite Zeolite with Hexadecyltrimethylammonium Surfactant as an Active Ingredient of Chromate-Selective Membrane Electrode

Table 9

Results of analysis of determination of chromate in electroplating waste water.

No.	Method	Cr(VI) in molar determined (𝑛=6)	𝑡exp^a
1	Potentiometric method	0.090 ± 0.0006	1.56
2	AAS method	0.092 ± 0.0008

^a𝑡_0.05,10=2.23 [40].