Nitrogen and oxygen isotope analyzer for nitrous oxide gas generated by denitrifying bacteria method

A technology of denitrifying bacteria and nitrous oxide, applied in the preparation of test samples, etc., to achieve the effects of convenient operation, simple and convenient test process, good use and promotion value

Active Publication Date: 2016-09-28
NORTHWEST INST OF ECO-ENVIRONMENT & RESOURCES CAS
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Problems solved by technology

But this method can only test N 2 δ in O 18 O / 16 O and delta 15 N / 14 N, unable to achieve NO for nitrate samples 3 - δ of 17 O / 16 O or excess 17 O / 16 Analytical determination of O

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  • Nitrogen and oxygen isotope analyzer for nitrous oxide gas generated by denitrifying bacteria method
  • Nitrogen and oxygen isotope analyzer for nitrous oxide gas generated by denitrifying bacteria method
  • Nitrogen and oxygen isotope analyzer for nitrous oxide gas generated by denitrifying bacteria method

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Embodiment Construction

[0015] The present invention adopts electric cooling trap 2 with a temperature control range of -10°C-100°C; chemical trap 3 is equipped with magnesium perchlorate and soda lime; VOC trap 4 is placed in alcohol liquid nitrogen; chromatographic column 8 is a Plot-Q capillary separation column The pyrolysis furnace 9 is a special high-temperature pyrolysis furnace for gold metal; the chromatographic column 10 is a 5A molecular sieve separation column; the water trap 11 maintains a He carrier gas 1; the reference gas open type split flow interface 18 has a reference gas O 2 15. Reference gas N 2 16. Reference gas N 2 O17 and He carrier gas1.

[0016] Below, the present invention provides a complete test process and the pressure and flow parameters of each section of air flow, combined with the use of the entire set of analyzers, key technical routes and accompanying drawings are provided, and the technical solution of the present invention is further described:

[0017] like ...

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Abstract

The invention discloses a set of nitrogen and oxygen isotope analyzer for nitrous oxide gas generated by a denitrifying bacteria method. The nitrogen and oxygen isotope analyzer is characterized in that the device can realize enrichment and purification of the nitrous oxide gas generated by the denitrifying bacteria method, a lot of organic components generated in a reaction process of gas CO2, steam and bacteria are removed, and influences on a test when impurity gas enters a mass spectrometer are avoided; when delta18O/16O and delta15N/14N in the nitrous oxide gas are analyzed and tested, the nitrous oxide gas is introduced into a gas isotope mass spectrometer through high-temperature cracking of the nitrous oxide gas, so that delta15N/14N and delta17O/16O or excess 17O/16O and delta18O/16O of N2 and O2 can be analyzed and determined.

Description

technical field [0001] The invention relates to a nitrogen and oxygen isotope analyzer for nitrous oxide gas generated by a denitrifying bacteria method. Background technique [0002] The denitrifying bacteria method test technology is currently the most advanced nitrate nitrogen and oxygen isotope test technology in the world, which is reflected in the realization of sample NO under normal temperature and pressure. 3 - Converted to mass spectrometrically measurable gas N 2 O, can test N at the same time 2 δ of O gas 18 O / 16 O and delta 15 N / 14 N isotopic composition. Its testing technology is widely used in soil analysis, environmental monitoring and other fields (Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agricultural Sciences, Xu Chunying, Li Yuzhong, etc.). The experimental process includes bacterial selection and cultivation, sample NO 3 - Convert N 2 O, N 2 O gas heating manual or online extraction and purifica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 孙维贞余海棠王宁练武小波赵国辉
Owner NORTHWEST INST OF ECO-ENVIRONMENT & RESOURCES CAS
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