Element analyzing system

Abstract

The invention discloses an element analyzing system. The element analyzing system comprises a combusting assembly for performing pre-combustion treatment on a substance to be tested, and an analyzing assembly for element analysis, wherein the combusting assembly comprises a gas source, a hearth and a gas mixing tank, which are communicated according to a process sequence; the gas mixing tank is in gas circuit communication with the analyzing assembly; the element analyzing system further comprises a background gas treating assembly and a communicating valve; the background gas treating assembly comprises a purifying pipe capable of removing water vapor and carbon dioxide gas; and the purifying pipe is communicated with the gas source, and is in gas circuit communication with the analyzing assembly through the communicating valve. Through structural design, combustion-supporting gas is divided into two paths; one path of gas is purified by the purifying pipe, the purified gas passes through a test unit, and a blank voltage value is obtained; the other path of the combustion-supporting gas is combusted to form test gas, the test gas passes through the test unit, and test voltage is obtained; and when a test sample is not contained, a blank test response value can be obtained, so that the reliability of the test result can be improved.

Description

technical field [0001] The present invention relates to the technical field of elemental analysis, and more specifically relates to an elemental analysis system. Background technique [0002] An elemental analysis system is used to test the five elements of carbon, hydrogen, oxygen, nitrogen, and sulfur in substances. The elemental analysis system uses infrared method, thermal conductivity method or infrared-thermal conductivity method to measure elements. Hydrogen element is the product H after combustion 2 O is measured, and the carbon element is determined as the product CO after combustion 2 For the measurement, the combustion-supporting gas adopts high-purity oxygen as required, for example, oxygen with a purity of 99.999%. If there is no condition, ordinary oxygen is used, and its purity is only 99.5%. Oxygen of different purity contains water and carbon dioxide, and the content of oxygen varies with purity. When doing sample testing, the water and carbon dioxide c...

AI Technical Summary

Problems solved by technology

[0005] At present, the elemental analysis system provided in the entire prior art cannot obtain a real blank value. The reason is that when doing a blank test, the reading of the blank voltage is a stable value obtained under the continuous purging of the compressed gas of the steel cylinder, and the measured voltage Since it does not contain a test sample, the response is also the value obtained by purging the compressed gas in the gas storage device

Both the blank voltage and the response of the test voltage contain moisture and carbon dioxide in the gas, so that the blank test cannot obtain the blank value in the compressed gas, resulting in low reliability of the element determination results

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