Method for testing oxynitride in environment

A technology of nitrogen oxides and determination methods, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of cumbersome operation, low accuracy, and high cost, and achieve simple sampling process, accurate height determination, and low detection limit Effect

Inactive Publication Date: 2015-12-23
CHNA ENERGY INVESTMENT CORP LTD +1
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Problems solved by technology

[0003] However, the above method has many disadvantages, such as cumbersome operation, high cost, long time, low ac

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  • Method for testing oxynitride in environment
  • Method for testing oxynitride in environment
  • Method for testing oxynitride in environment

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[0018] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0019] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0020] It can be seen from the background technology that the existing methods for the determination of nitrogen oxides in the environment have many shortcomings, such...

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Abstract

The invention provides a method for testing oxynitride in the environment. The test method comprises the following steps: nitric oxides in a standard sample are sent to a chromatographic test column by a discharge ionization detector and through steps of isolation and cutting reverse blowing, and standard chromatograms of all the nitric oxides in the standard sample are obtained; peak areas of all the nitric oxides in the standard sample are obtained according to the standard chromatograms, and correction factors of all the nitric oxides are calculated according to the peak areas of all the nitric oxides in the standard sample and the concentration of all the nitric oxides in the standard sample; to-be-tested gas is tested with gas chromatography test conditions which are same with the standard sample, test chromatograms of nitric oxides in to-be-tested air are obtained, and the concentration of each nitric oxide which is equal to the correction factor multiplying the peak area of the corresponding nitric oxide in the to-be-tested gas is calculated according to the peak areas of all the nitric oxides in the test chromatograms. The test method has the advantages that the sampling process is simple and rapid, the accuracy and the sensitivity are high, the detection limit is low and the like.

Description

technical field [0001] The invention relates to the field of chemical analysis and testing, in particular to a method for measuring nitrogen oxides in the environment. Background technique [0002] With the rapid development of industrial production, the existence of nitrogen oxides is seriously harmful to the environment and human beings, and at the same time has a certain impact on safe production. For example, in an air separation and compression device, when nitric oxide passes through the air compressor, it will be polymerized or partially oxidized, which will cause organic hydrocarbons to be suspended in the surface of the liquid air after being precipitated as solids in the cryogenic liquid air. Intense impact, friction and sparking on the surface of liquid air will cause explosion hazard. The concentration of nitrogen oxides from different sources is different, and the methods used to analyze and measure them are also different. At present, the methods for determin...

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Application Information

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IPC IPC(8): G01N30/02
Inventor 安志华夏俊兵邓方文杨红杰张大伟黄起中王立峰
Owner CHNA ENERGY INVESTMENT CORP LTD
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