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

Table 2

Optimization of the modifier percentage in chromate-selective electrode based on SMZ at 25°C (𝑛=5).

Electrode	Modifier percentage	Slope (mV·decade^−1) (𝑛=5)
A	4% (nanoclinoptilolite +50 mM HDTMA)	−47.7 ± 1.3
B	4% (nanoclinoptilolite +100 mM HDTMA)	−29.2 ± 1.4
C	4% (nanoclinoptilolite +200 mM HDTMA)	−38.9 ± 0.6