1、 Working principle of automatic micro moisture analyzer

Automatic micro moisture analyzerThe working principle of is based on a specific chemical reaction system: when there is water in the system, iodine (I ₂) will be reduced by sulfur dioxide (SO ₂); Under the combined action of pyridine (C ₅ H ₅ N) and methanol (CH3 OH), hydrogen iodine acid pyridine (C ₅ H ₅ N · HI) and methyl hydrogen sulfate pyridine (C ₅ H ₅ N · HSO ₄ CH3) are further generated.

2、 Automatic micro moisture analyzer reaction equation

1. Main reaction:

H₂O + I₂ + SO₂ + 3C₅H₅N → 2C₅H₅ N·HI + C ₅H₅N·SO₃

2. Subsequent reactions:

C₅H₅N·SO₃ + CH₃OH → C₅H₅ N·HSO ₄CH₃

During the electrolysis process of the instrument, the electrodes undergo the following electrochemical reactions:

• Anodic reaction:2I⁻ - 2e⁻ → I₂

• Cathodic reaction:

① 2H⁺ + 2e⁻ → H₂↑

② I₂ + 2e⁻ → 2I⁻

The iodine (I ₂) generated during the electrolysis process will continue to react with the moisture in the sample, regenerating hydrogen iodine acid (HI, existing in the form of C ₅ H ₅ N · HI), and this cycle will continue until all the moisture in the sample has reacted. The endpoint of the reaction is accurately determined by a detection unit composed of a pair of platinum electrodes.

In the entire reaction system, the consumption of sulfur dioxide (SO ₂) is proportional to the number of moles of water in the sample. according toFaraday's law of electrolysisThe amount of electricity consumed during the electrolysis process is proportional to the amount of substance that generates iodine: that is, when 1 mol of iodine (I ₂) is produced through electrolysis, 1 mol of water (H ₂ O) is consumed, and this process requires twice the amount of electricity (i.e. 192986C) that is 96493C (Faraday constant).

The following is an introduction to the independent research and development production of Sci Tech StarAutomatic micro moisture analyzerThe characteristics of the instrument are introduced as follows:

View products

Keywords of this article:XG611 Automatic Trace Moisture Analyzer，XG612 Automatic Trace Moisture Analyzer