Micro Coulomb Chlorine Content Tester Principle and Calculation Formula

The Micro Coulomb Chlorine Analyzer is based on the microcoulomb principle that various forms of sulfur (chlorine) in the sample are changed to sulfur dioxide (all HCl) under high temperature in nitrogen and oxygen and enter the titration cell to produce iodine and sulfur dioxide through electrolysis. The reaction (the reaction of silver ions and chloride ions in the cell by electrolysis), the microcomputer automatically calculates the total sulfur content of the sample according to Faraday's law according to the amount of iodine consumed (the amount of electricity consumed by the generated silver ions). Chlorine content). The entire analysis process is controlled by a computer. Samples are loaded by the autosampler and the instrument is highly automated. It can be used for the analysis of trace sulfur or chlorine in petrochemical products. It is widely used in petroleum, chemical, scientific research, teaching, environmental protection, quality inspection, commodity inspection and other industries.

Micro Coulometric Chlorine Analyzer Features:

v The latest digital coulometer, the most comprehensive and widely used measurement sulfur (chlorine) meter. The sulphur (chlorine) meter with the best performance and highest degree of automation.

v computer control, display the entire process state, parameters, print a variety of results.

v The operation is simple, the performance is reliable, the stability is good, the installation is simple, the cracking system is air-cooled, and the fan starts and stops automatically.

The microcoulometric analyzer adopts the principle of Faraday's law. In the electrolysis cell, for each pass of 96500 coulombs, one gram of equivalent substance will be precipitated or dissolved on the electrode. Formulated as follows:

W=Q/96500*(M/N)

In the formula:

W - The amount of precipitated material, in grams.

N—The number of electrons consumed for each molecule or atom that has precipitated or dissolved in the electrode.

M—The molecular or atomic mass of the precipitated substance.

Q—The amount of electricity that passes through the electrodes during electrolysis.

The sample is carried by the carrier gas into the cracking tube and the oxygen is fully combusted. The sulfur or chlorine therein is quantitatively converted to SO2 or HCL. SO2 or HCL is absorbed by the electrolyte and the following reaction occurs:

SO2+H2O+I2 =SO3 +2H++2I- or HCL+Ag+=AgCl↓+H+

The reaction consumes I2 or Ag+ in the electrolyte, causing a change in the electrode potential of the cell, and the microcoulometric detector detects this change and applies a corresponding electrolysis voltage to the electrolytic cell of the cell. Electrode I2 or Ag+ is electrolyzed on the electrode until I2 or Ag+ in the electrolysis cell returns to their original concentration. The instrument detects the amount of electricity consumed in this electrolysis process. The amount of I2 or Ag+ consumed by the reaction is deduced from the Faraday’s law of electrolysis to obtain the concentration of S or CL in the sample.

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