Brief description of the analytical control subject-matter of the total concentration of different ionic entities in a sample

摘要

Process, which is independent of the flow rate, the control of the total concentration of different entities of the ionic form x * * - n, hmx * * - n + m in a sample, with n varying between 1 and m and x * * - n being an anion is chosen from the group comprising the fluoride ion f * * - and the sulphide s * * - 2.... & br / the ph of the sample is adjusted to a value lower than that of the pka of the entity of the series which is the most highly supplemented with protons. An electrode 34 is sensitive to the activity of the entity x * * - n is placed in the flux whose ph is adjusted. The electrical potential thus produced is measured. Another electrode 32 sensitive to the activity of the hydrogen ion h * * + is also placed in this flow. The electrical potential thus produced is also measured. The potential difference between the two electrodes is a measurement of the total concentration of the series x * * - n, hmx * * - n + m & br / application to the continuous control of the content of sulphides and fluorides of the environment of workshops for the manufacture of paper and textile products or the like. & br / (see appended drawing in bopi) & br / & & br /