Determination of trace moisture in industrial fluoroalkanes (3)

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The moisture in the sample reacts quantitatively with that in the electrolyte, and the reaction formula is:

H ₂ O+I ₂ +SO ₂ →2HI+SO ₂

2I ^-— 2e→I ₂

The fraction of iodine participating in the reaction is equal to the fraction of water, and the iodine produced by electrolysis is proportional to the amount of electricity consumed.

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The electrolyte (commercially available reagent) matched with the coulometric moisture meter

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Add electrolyte to adjust the Coulomb Moisture Analyzer to make the titration cell reach an anhydrous state

Connect the injection needle with a stainless steel (or suitable material) size joint and the outlet valve of the sampling cylinder containing the sample, and weigh the sampling cylinder with the injection needle to the accuracy of 0.

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The mass fraction w ₂ of water in the sample , the value is expressed in %, calculated according to formula (3):

Where:

m—The value of the mass of water in the sample, in grams (g);

m ₁ —The value of the mass of the sampled cylinder and the sample before sampling, in grams (g);

m ₂ —The value of the mass of the sampled cylinder and the sample after the injection, in grams (g)
.

Related Links: Determination of Trace Moisture in Industrial Fluorinated Alkanes (2)