1 Scope
This document specifies two evaluation methods for ozone content (total ozone, including
ozone contained in ultrafine bubbles (UFBs) or microbubbles (MBs) and dissolved ozone) in UFB dispersions in water, namely, iodometric titration and UV photometry.
Iodometric titration is applicable as a well-established, high accuracy chemical procedure, particularly
suitable for single-point determinations. The direct measurement range of this technique
is typically 0,01 mg/l to 50 mg/l.
Ultraviolet (UV) photometry is applicable for rapid or continuous measurement and
real-time monitoring. Its typical measurement range is from 0,075 mg/l to 200 mg/l,
depending on instrument specification.
This document is applicable to industrial processes that require precise ozone dosing
and control when MB or UFB systems are used.
NOTE This document does not involve the specific effects of ozone UFB dispersion applications. High concentrations of dissolved oxygen (DO), commonly found
in water containing oxygen UFBs, can interfere with iodometric titration and lead to overestimation of ozone content. When extremely high ozone levels are
expected, water containing oxygen UFBs can be used as the blank control.
Open preview (PDF)Fine bubble technology. Evaluation method for determining gas content in fine bubble dispersions in water - Ozone content