Method And Device For Measuring The Purity Of Ultrapure Water

摘要

This is a method for analyzing the purity of water at the outlet from a purification device. It comprises the following steps: a) sending the liquid at the outlet from the filter means (1) to a resistivity measuring cell (4) to determine its resistivity PUPW; b) establishing a reference mode by exposing a portion of the liquid to said oxidation means (2) during a given number of significantly different time periods; c) determining by regression the resistivity at infinity p∞REF of said liquid in this reference mode; d) establishing an analysis mode by causing said liquid to be analyzed to pass through the resistivity measuring cell (4); e) determining the resistivity at infinity p∞ of said liquid in this analysis mode by successive iterations; and f) calculating the quantity of organic compounds contained in said purified liquid from this resistivity at infinity p∞ and at least the values PUPW and P∞REF.