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

Table 2

Effect of concentrations of Fe(CN)₆₃₋-Fe(CN)₆₄₋ potential buffer solution on sensitivity.

Concentration (M)	Sensitivity^a (mV mM^−1)	Measurable concentration range (M)
1×10^−2	9.7	2.0×10^−4∼1.8×10^−3
1×10^−3	9.5×10	2.0×10^−5∼1.8×10^−4
1×10^−4	9.4×10^2	2.0×10^−6∼1.8×10^−5
5×10^−5	1.9×10^3	1.0×10^−6∼1.0×10^−5
1×10^−5	6.2×10^3	2.5×10^−7∼2.5×10^−6

^aSensitivity: slope of calibration curve (peak height/mV obtained by injection of 1 mM glucose).