On Various Methods of Measuring the Vertical Distribution of Atmospheric Ozone (II)
Titration-type Chemical Ozonesonde
1966 Volume 17 Issue 2 Pages 97-112
Details
1966 Volume 17 Issue 2 Pages 97-112
A device for measuring the concentration of atmospheric ozone is described which utilizes the well-known potassium iodide method.
Its operational principle is based on the reaction of o zone with a neutrally buffered potassium iodide solution containing a known amount of sodium thiosulf ate and the libration of iodine in the solution by means of electrolysis. It consists essentially of a detector for monitoring the depolarizing action of the neutral iodide, a device for electrolysing the solution at a constant rate and a device for titrating the calibrated quantity of sodium thiosulfate into the solution.
The sensitivity of this device is about 2 x 10-6 g/m3/sec and the response time is about 30 seconds. The method is based on the absolute calibration, so long as no contamination effect exists. The device can be attached to various kinds of radiosondes and it is also applicable to the continuous monitoring of ozone at the ground. Several successful flight results are sho w n and discussed from an instrumental standpoint.
