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Test methods for carbon sulfur analyzers

Test methods for carbon sulfur analyzers

Answer:

The conductance method (conductance sulfur analyzer): This is a method to measure the content of carbon and sulfur analysis according to the variation of conductivity, mixed gas samples produced by high temperature combustion, the conductivity cell absorption, resistivity (conductivity reciprocal) change, to determine the content of carbon, sulfur and its characteristics is accurate, rapid and sensitive. Used for low carbon and low sulfur determination.
Gravimetric method (carbon and sulfur combined instrument): common alkali asbestos absorbs carbon dioxide, and carbon content is determined by increment. Determination of sulfur used wet sample decomposition with acid oxidation, transformed into sulfate, then adding barium chloride in hydrochloric acid medium to produce barium sulfate, precipitated, filtered, washed and burned, weighing and finally calculate the sulfur content. Slow speed is the weight analysis method shortcoming, so it is not possible for the analysis of Companies in the field of carbon and sulfur, the utility model has the advantages of high accuracy, is still at home and abroad as a standard method recommended for standard laboratories and research institutions.
Infrared absorption method (infrared carbon and sulfur analyzer): the carbon and sulfur in the sample are heated by the high temperature under the oxygen rich condition to oxidize to carbon dioxide and sulfur dioxide gas. After the gas is treated, it is absorbed into the corresponding absorption cell, absorbed by the corresponding infrared radiation, transmitted by the detector as a signal, and processed by the computer. This method has the characteristics of accurate, rapid, high sensitivity, high and low sulfur content of carbon were used, the infrared carbon sulfur analyzer by using this method, a higher degree of automation, the price is relatively high, suitable for the analysis of precision.

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