Table 3 Validation parameters of the optimized sensor

Linearity

 Slope (mV per decade)

60.23

61.90

 Correlation coefficient (r)

0.999

0.998

 Concentration range (M)

9.09 × 10⁻⁶–1.0 × 10⁻²

1.0 × 10⁻⁵‒1.0 × 10⁻²

LOQ (M)

9.09 × 10⁻⁶

1.00 × 10⁻⁵

LOD (M)

4.24 × 10⁻⁶

7.91 × 10⁻⁶

Accuracy (mean ± SD)

100.05 ± 0.577

100.15 ± 0.516

Precision

 Repeatability (%RSD)

1.051

1.970

 Intermediate precision (%RSD)

1.106

1.889

Working pH range

2‒6

Response time (s)

3–6

Life span (weeks)

4