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Preparation method for ethyl nitrite standard gas

A technology of ethyl nitrite and a preparation method, which is applied in the preparation field of industrial ethyl nitrite standard gas, can solve the problems of difficult selection of an internal standard substance, quantitative uncertainty of ethyl nitrite, etc., and achieves accurate and reliable gas concentration Effect

Active Publication Date: 2014-12-24
JIANGSU WAN QI BIOLOGICAL TECH
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  • Abstract
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Problems solved by technology

However, because the internal standard is difficult to select, it brings uncertainty to the quantification of ethyl nitrite

Method used

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  • Preparation method for ethyl nitrite standard gas

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] figure 1 A flow chart of preparing ethyl nitrite standard gas according to the preparation method of the present invention is shown.

[0021] To prepare ethyl nitrite standard gas, refer to figure 1 , in step 101, the container used in the preparation process is firstly pretreated. In this embodiment, a steel cylinder is selected as the container used in the preparation process, and the volume of the steel cylinder is V. In other embodiments of the present invention, other containers that can accommodate ethyl nitrite can also be selected as the container used in the preparation process. In this embodiment, the pretreatment of the steel cylinder includes cleaning the steel cylinder with a diluent gas (such as nitrogen), and coating the inner wall of the steel cylinder to prevent ethyl nitrite from being adsorbed on the inner wall of the stee...

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Abstract

The invention provides a preparation method for ethyl nitrite standard gas. The method comprises the following steps of: a1, pre-treating a container used in the preparation method; a2, vacuating the container and sealing; a3, absorbing liquid ethyl nitrite into a syringe, and weighing the total mass m1 of the syringe and the liquid ethyl nitrite; a4, weighing mass m2 of the syringe; and a5, introducing diluents into the container to obtain the ethyl nitrite standard gas. The ethyl nitrite standard gas prepared by the preparation method is accurate and reliable in gas concentration. Industrial ethyl nitrite standard gas can be prepared easily and quickly by the method, the standard gas is provided for detecting ethyl nitrite, and the method has industrial application significance.

Description

【Technical field】 [0001] The invention relates to a preparation method of ethyl nitrite, in particular to a preparation method of industrial ethyl nitrite standard gas. 【Background technique】 [0002] Ethyl nitrite is an organic compound with low flash point, low boiling point and easy volatilization at room temperature. Ethyl nitrite has important biomedical uses and can be used in the medical and chemical fields. In specific applications, it is often necessary to detect the concentration of ethyl nitrite. In order to detect the concentration of ethyl nitrite, a standard gas of ethyl nitrite is required. [0003] However, ethyl nitrite is unstable and not easily soluble in water, which brings many difficulties to the preparation of standard gas of ethyl nitrite. The current practice is to blow into ethyl nitrite with nitrogen, and quantify it through a rotameter, and the quantification method is generally quantified by an internal standard method. However, because the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
Inventor 王文剑栾琳黄薇子刘若鹏
Owner JIANGSU WAN QI BIOLOGICAL TECH
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