Host-Tailored Sensors for Leucomalachite Green Potentiometric Measurements

Table 2

Main analytical features of the LMG potentiometric sensors in 5.0 × 10⁻² mol L⁻¹ phosphate buffer, pH 4.5.

ISE	Slope (mV decade^−1)	𝑅^2 (𝑛=5)	LOD (mol L^−1)	LLLR (mol L^−1)	𝜎𝑣 (mV)	C 𝑣𝑤 (%)
I	50.7±0.5	0.994	3.0×10^−5	5.0×10^−5	1.42	11
II	56±5	0.996	3.2×10^−5	8.9×10^−5	3.54	3.2
III	46±3	0.933	1.2×10^−5	1.6×10^−5	6.08	5.3
IV	68±2	0.997	1.5×10^−5	3.0×10^−5	2.33	1.6
V	78±8	0.998	4.3×10^−5	8.9×10^−5	1.77	0.95
VI	68±4	0.993	1.3×10^−5	1.6×10^−5	8.16	6.0
VII	81±3	0.992	3.6×10^−5	5.0×10^−5	—	—
VIII	78±3	0.993	3.9×10^−5	5.0×10^−5	5.23	6.0
VIII	7±3	0.972	5.3×10^−4	4.2×10^−4	5.23	1.8

C𝑣_𝑤: coefficient variation if weekly calibration for 2.72×10⁻⁴ M; 𝑅²: correlation coefficient; LOD: limit of detection; LLLR: lower limit of linear range; 𝜎: standard deviation of the analytical measure for a concentration in the middle of the calibration curve, considering 3 consecutive calibrations.