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Preparation method for ethyl nitrite standard gas

A technology of ethyl nitrite and a preparation method, which is applied to 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: 2015-02-04
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

[0020] figure 1 It is a structural diagram of a device for preparing ethyl nitrite standard gas according to the preparation method of the present invention. The device includes: valves 101, 103, 105, 107, 109, 112, 116, these valves are used to control the communication between the various parts in the device and the communication between the device and other devices; flow meter 102, used to measure Gas volume; Steel cylinder 104, deposits inert gas wherein; Gas cylinder 106, is used for preparing ethyl nitrite standard gas; Quantitative loop 108, is used for determining the volume of the gas passing through it; Vacuum constant temperature reactor 111, is used for liquid Vaporization; rubber stopper 118, used to seal vacuum constant temperature reaction kettle 111. Vacuum mechanical pump 117 is used to evacuate the entire pipeline; pressure gauge 113 is used to measure the pressure in the pipeline; vacuum gauge 114 is used to determine whether the pipeline is vacuum; and the...

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Abstract

The invention provides a preparation method for ethyl nitrite standard gas. The method includes the following steps: (a1) ethyl nitrite solution is filled into a vacuum constant-temperature reaction kettle and kept for 2 hours, wherein the temperature in the vacuum constant-temperature reaction kettle is kept at 25 DEG C until the ethyl nitrite solution becomes saturated vapor; (a2) the saturated ethyl nitrite vapor is quantitatively transferred into a sample loop; (a3) the saturated ethyl nitrite vapor in the sample loop is put into a standard gas bottle; (a4) steps a1 to a3 are repeated in order to regulate the volume of the saturated ethyl nitrite vapor entering the standard gas bottle; (a5) inert gas used as diluting gas is filled into the standard gas bottle; (a6) the ethyl nitrite standard gas is obtained. The concentration of the ethyl nitrite standard gas prepared by the preparation method is accurate and reliable. The usage of the method can easily and conveniently prepare the industrial ethyl nitrite standard gas, provides standard gas for the industrial test of ethyl nitrite, and is highly significant in industrial application.

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, not easily soluble in water, and there is no pure product of ethyl nitrite, which brings many difficulties to the preparation of standard gas of ethyl nitrite. The current practice is to blow ethyl nitrite with nitrogen and quantify it by rotameter or by internal standard method. However, because the internal standard is diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/38B01F15/04B01F3/02B01F23/10
Inventor 王文剑栾琳黄薇子刘若鹏
Owner JIANGSU WAN QI BIOLOGICAL TECH
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