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Method for preparing N2O with confirmed 15N abundance

A concentration, SO4 technology, applied in the field of chemistry, can solve the problems of complex operation, hidden dangers, unstable raw materials, etc., to achieve the effect of simple operation, high accuracy and precision of results

Active Publication Date: 2019-05-10
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently N 2 The preparation methods of O gas mainly include the thermal decomposition method of ammonium nitrate, the contact oxidation method of ammonia, and the method of Penicillium violet. The above methods have certain limitations, such as potential safety hazards, insufficient synthesis purity, unstable raw materials, and complicated operations. question

Method used

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  • Method for preparing N2O with confirmed 15N abundance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 20ml 20mg N L -1 K 15 NO 3 solution with 1ml of 20% TiCl by mass concentration 3 Mix the solution in a 120ml glass bottle with a butyl stopper, tightly cover it and shake gently, let it stand for more than 5 hours, extract 20ml of gas from its upper part and transfer it to another 20ml glass bottle with KOH particles added to the bottom of the sealed vacuum , standing for more than 24h, that is 15 N 2 O gas. Its abundance is basically the same as the selected K 15 NO 3 The abundance is the same, but it needs to be diluted and tested for its concentration and 15 N abundance. The test results are as follows:

[0029] Table 1: Different 15 N abundance KNO 3 Generated N 2 O's 15 N abundance and N 2 O concentration

[0030] K 15 NO 3 of 15 N abundance

Embodiment 2

[0032] 20ml 20mg N L -1 Na 15 NO 3 solution with 1ml of 20% TiCl 3 Mix the solution in a 120ml glass bottle with a butyl stopper, cover tightly and shake gently, let it stand for more than 5 hours, extract 20ml of gas from its upper part and transfer it to another 20ml glass bottle with NaOH particles added to the bottom of the sealed vacuum , standing for more than 24h, that is 15 N 2 O gas. Its abundance is basically the same as the selected Na 15 NO 3 The abundance is the same, but it needs to be diluted and tested for its concentration and 15 N abundance.

Embodiment 3

[0034] 20ml 20mg N L -1 K 15 NO 3 solution with 1ml of 20% Ti 2 (SO 4 ) 3 Mix the solution in a 120ml glass bottle with a butyl stopper, tightly cover it and shake gently, let it stand for more than 5 hours, extract 20ml of gas from its upper part and transfer it to another 20ml glass bottle with KOH particles added to the bottom of the sealed vacuum , standing for more than 24h, that is 15 N 2 O gas. Its abundance is basically the same as the selected K 15 NO 3 The abundance is the same, but it needs to be diluted and tested for its concentration and 15 N abundance.

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Abstract

The invention belongs to the technical field of chemistry and specifically relates to a method for simply and conveniently preparing N2O with confirmed 15N abundance. The method provided by the invention is simple in operation, is low in cost and can be performed in laboratories; potassium nitrate or sodium nitrate with confirmed 15N abundance is used as a substrate for acquiring the N2O with confirmed 15N abundance; the 15N2O gas with specific abundance can be prepared according to requirements; the 15N2O gas prepared according to the method can be used for researching nitrogen cycle and performing quantitative and qualitative detection; result accuracy and precision are high.

Description

technical field [0001] The invention belongs to the technical field of chemistry, in particular to a kind of simple and convenient preparation with definite 15 N abundance N 2 O's method. Background technique [0002] N isotope tracer technology is one of the effective methods to study nitrogen cycle. Through tracer technology, we can better distinguish the rate and flux of each process of nitrogen cycle turnover, and then we can observe the turnover of nitrogen cycle qualitatively and quantitatively. Currently N 2 The preparation methods of O gas mainly include the thermal decomposition method of ammonium nitrate, the contact oxidation method of ammonia, and the method of Penicillium violet. The above methods have certain limitations, such as potential safety hazards, insufficient synthesis purity, unstable raw materials, and complicated operations. question. [0003] And how to prepare quickly, safely and conveniently in the laboratory has a definite 15 N abundance N ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/22
Inventor 宫平武志杰张丽莉李东坡宋玉超薛妍武开阔杨立杰崔亚兰
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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