Which of the following is the detection limit of coulometric method used for measurement of sulphur di-oxide?
A. 0.1 ppm
B. 1 ppm
C. 2 ppm
D. 0.01 ppm
Answer:D
Which of the following is the detection limit of coulometric method used for measurement of sulphur di-oxide?
A. 0.1 ppm B. 1 ppm C. 2 ppm D. 0.01 ppm
Explanation: The detection limit of coulometric method is 0.01 ppm. The shift in anode cathode potential is detected by a third electrode.