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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 field of preparation of industrial ethyl nitrite standard gas, can solve the problems of difficult selection of internal standards, uncertainty of ethyl nitrite quantification, etc., and achieve accurate and reliable gas concentration Effect

Active Publication Date: 2012-07-04
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
  • 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 drawings and embodiments.

[0020] figure 1 It shows a flow chart of preparing ethyl nitrite standard gas according to the preparation method of the present invention.

[0021] In order to prepare ethyl nitrite standard gas, refer to figure 1 , In step 101, first pre-treat the container used in the preparation process. 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 contain ethyl nitrite can also be used as containers used in the preparation process. In this embodiment, the pretreatment of the steel cylinder includes cleaning the steel cylinder with a diluent gas (for example, nitrogen), and coating the inner wall of the steel cylinder to prevent ethyl nitrite from being adsorbed on the inner wall of the steel cylinder. The use of...

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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 an industrial ethyl nitrite standard gas. 【Background technique】 [0002] Ethyl nitrite is an organic compound with extremely low flash point, low boiling point, and easy volatilization at room temperature. Ethyl nitrite has important biomedical applications and can be used in 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, ethyl nitrite standard gas is needed. [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 nitrogen nitrite into ethyl nitrite and quantify it through a rotameter. The quantification method is generally through an internal standard method. However, it is difficult t...

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Application Information

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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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