Development of Chromium(III) Selective Potentiometric Sensor by Using Synthesized Triazole Derivative as an Ionophore

Table 2

Cr(III) concentration as determined by the proposed potentiometric sensor as well as by atomic absorption spectrophotometer.

Sample no.	pH found	pH adjusted at	Cr(III) activity as determined by the proposed sensor (ppm)*; (Standard deviation ± 0.1)	Cr(III) activity as determined by AAS (ppm)
1	2.6	3.0	5.6	5.7
2	2.2	3.0	6.5	6.4
3	2.6	3.0	6.9	7.0
4	4.4	3.0	14.0	13.8
5	5.2	3.0	13.6	13.7
6	5.8	3.0	11.8	11.6

^*All the observations are the average value for four readings recorded for the same sample.