Rapid and Automated Analytical Methods for Redox Species Based on Potentiometric Flow Injection Analysis Using Potential Buffers

Table 4

Sensitivities to oxychlorine species.

Oxychlorine species	Sensitivity (mV/mM)		Enhancement factor, (A)/(B)
	(A) Observed in FIA system	(B) Calculated^a
HClO	1.2 × 10^4	15 (m = 2)	800
ClO2−	2.1 × 10^4	30 (m = 4)	700
ClO3−	3.4	45 (m = 6)	0.08
ClO3−	4.3 × 10^2 b	45 (m = 6)	9.8

^aSensitivity calculated from (6) using 5×10⁻³ M Fe(III)-1×10⁻² M Fe(II).
^bSlope of the calibration curve observed in the FIA system with buffer-A containing 9.0 M H₂SO₄ and reaction coil of 200 cm in length.