Coulometric Moisture Analyzer Applications: Can be applied to a variety of organic and inorganic moisture determination, but due to the differences in the nature of various compounds, only in the Cartesian reagent in the case of no side effects without interference, Coulomb Coulomb Method determination is an exclusive method. The principle is that (1) the side reaction cannot produce water; (2) the sample cannot consume iodine or release iodine.

Substances that mainly have side reactions and interference are classified into the following eight categories:

1. Salts, hydroxides, and oxides; for example: Na2CO3 HI→NaI CO2 H2OCa(OH)2 H2SO4→CaSO4 H2OMgO HI→MgI2 H2 There are also some substances that can also undergo side reactions such as: Ag2O, HgO, MnO2, PbO , PbO2 and ZnO

2. Ketones and aldehydes These compounds combine with methanol in the Carter's reagent to form ketals and acetals and release water. The use of Karls & Coulomb's method is generally not easy to determine, but the Karl Fischer volumetric method can be measured, changing the composition of the Carter reagent, such as the use of ethylene glycol monomethyl ether or 2-methoxyethanol can be a good determination of the replacement of methanol. effect. It is worth noting that not all ketones and aldehydes can be measured by the Coulometric Coulomb method. For example, formaldehyde, trifluoroacetaldehyde, diisopropyl ketone, acetophenone, benzoin ketone and other substances will not react and release moisture when they enter the Carter's reagent. In view of the fact that the determination accuracy of the Karl Fischer capacity method can reach 10-4, from the perspective of companies that produce ketones and aldehydes, the Cartesian capacity method is recommended as long as the requirements for use are met.

3, strong acid and acid will react with methanol in Carter's reagent to release water 2CH3OH H2SO4 → (CH3O) SO2 H2OCH3OH HOOCH → CH3O-OCH H2O

4, silanol / silicone terminal silanol group and Carrageenan methanol in the lipidation reaction to generate water;

5. The boron-containing compound boric acid and methanol undergo a lipidation reaction to generate water;

6. Metal peroxide reacts with Carter's reagent to generate water;

7. Substances that consume iodine These substances react with iodine in the Carter's reagent, leading to high levels of moisture, such as iron salts, ketone salts, nitrites, and thiosulfates;