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

Table 3

Effect of SMZ-PVC membrane composition on the potentiometric behavior of the chromate-selective electrode (𝑛=5) at 25°C.

No.	PVC%	SMZ%	DOP%	Slope (mV·decad^−1)	𝑟^2	Linear range (−log 𝐶)
1	32.7	2	65.3	40.1 ± 0.7	0.9822 ± 0.0010	2–5
2	32	4	64	29.9 ± 0.9	0.9944 ± 0.0035	2–5
3	31.3	6	62.7	16.4 ± 1.3	0.9865 ± 0.0019	2–4
4	30	10	60	20.3 ± 0.6	0.9901 ± 0.0058	2–4