Synthesis of a New Calix[4]Arene and Its Application in Construction of a Highly Selective Silver Ion-Selective Membrane Electrode

Table 1

Optimization of membrane ingredients.

Membrane no.	Composition (%)				Slope (mV per decade)
	PVC	Plasticizer	Ionophore	NaTPB
1	30	BA, 66	4	—	17.5±0.5
2	30	BA, 65	5	—	21.2±0.4
3	30	BA, 64	6	—	20.3±0.3
4	30	BA, 63	7	—	19.2±0.6
5	30	BA, 63	5	2	48.4±0.3
6	30	BA, 62	5	3	52.5±0.3
7	30	BA, 61	5	4	56.7±0.5
8	30	BA, 60	5	5	56.4±0.5
9	30	DBP, 61	5	4	59.7±0.4
10	30	NB, 61	5	4	20.8±0.5
11	30	DBP, 66	—	4	7.8±0.5