Standard gas mixturesThe method of preparation varies depending on the nature of the substance. There are two standard gas mixture configuration methods: static formulation and dynamic formulation. Let's take a look at the two different configuration methods below.
Clause. 1. Static gas distribution method.
The static gas distribution method is a standard gas preparation method commonly used by companies with standard gas mixtures. When configured, a certain amount of gaseous or vapor raw gas should be added to a container with a known volume, and then filled with dilute gas and mixed to obtain standard gas. The raw material used in this process can be pure gas or a standard gas mixture of known concentrations, and the concentration of the standard gas is calculated according to the volume of the added feed gas and diluted gas and the volume of the container.
Clause. 2. Dynamic gas distribution method.
Standard gas mixtures also have a method of configuring standard gases, which is the dynamic gas dispensing method. The use of dynamic gas distribution method first needs a known raw gas concentration and dilution gas, in a certain proportion of continuous mixing, can be continuously prepared and ** a certain concentration of standard gas, twisted pair flow ratio is dilution gas, and then according to the dilution can calculate the standard gas concentration. The dynamic gas distribution method is characterized by a relatively large gas supply and can also obtain the required concentration of standard gas by adjusting the flow ratio of raw gas and diluted gas, so this method is particularly suitable for the preparation of low concentration standard gas mixture.
The above two commonly used standard gas mixture preparation methods are first talked about here, the preparation methods of the two standard gases are different, and the concentration is different, therefore, we should understand which configuration method is used when purchasing standard mixed gas.