Device and method for determining dissolved nitrous oxide in water

A nitrous oxide and water technology, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of inaccurate detection results, loss of nitrous oxide, etc., and achieve the effects of high sensitivity, high degree of automation, and simple operation.

Inactive Publication Date: 2016-09-21
THIRD INST OF OCEANOGRAPHY STATE OCEANIC ADMINISTATION
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although early researchers used dry ice cold traps or semiconductor refrigeration technologies to adsorb nitrous oxide gas on molecular siev

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for determining dissolved nitrous oxide in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] see figure 1 The embodiment of the device for measuring dissolved nitrous oxide in water according to the present invention is provided with a high-purity nitrogen cylinder 1, a first pressure reducing valve 2, a second pressure reducing valve 4, a mass flow controller 3, a flow meter 5, and a six-way Valve 6, the first three-way valve 7, the second three-way valve 8, Nafion tube 9, semiconductor refrigerator 10, purge tube 11, trapping tube 12, Dewar tank 13, electric heating tube 14, twelve-way valve 15. Cologne pump 16, sample bottle 17, gas chromatograph 18;

[0024] The high-purity nitrogen cylinder 1 is respectively connected to the first pressure reducing valve 2, the second pressure reducing valve 4, and the mass flow controller 3, the outlet of the first pressure reducing valve 2 is connected to the inlet of the flowmeter 5, and the o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a device and a method for determining dissolved nitrous oxide in water and relates to detection of dissolved nitrous oxide in water. The device comprises a nitrogen cylinder, a first pressure reducing valve, a second pressure reducing valve, a mass flow controller, a flow meter, a six-way valve, a first three-way valve, a second three-way valve, a Nafion tube, a semiconductor cooler, a scavenging conduit, a trapping tube, a Dwarf can, an electric heating tube, a twelve-way valve, a Kelun pump, a sample bottle, a gas chromatograph and a computer. The method comprises a sample introduction stage, a scavenging stage, a trapping stage, a desorption stage and a separation and detection stage. Short time is consumed, the sensitivity is high, the automation degree is high, the operation is simple, the temperature can be subzero 100 DEG C or lower with adoption of the Dwarf can for accommodating liquid nitrogen to serve as a low-temperature source of the trapping tube, and nitrous oxide gas can be trapped on a molecular sieve completely. The electric heating tube can be heated to the temperature of 100 DEG C or higher within 0.5 min, so that the nitrous oxide gas can be desorbed rapidly to enter the gas chromatograph. The concentration of the nitrous oxide gas can be determined accurately by means of the Kelun pump.

Description

technical field [0001] The invention relates to the detection of dissolved nitrous oxide in water, in particular to a device and method for measuring dissolved nitrous oxide in water. Background technique [0002] Nitrous oxide gas has important effects on global climate and atmospheric chemical processes. The greenhouse effect of the equivalent amount of nitrous oxide is 200-300 times that of carbon dioxide. At the same time, its photochemical product NO can be combined with O in the stratosphere 3 reaction, destroying the atmospheric ozone layer (Crutzen, 1970). The concentration of nitrous oxide in the atmosphere is increasing at a rate of about 0.25% per year. For every 5ppb increase in the partial pressure of nitrous oxide in the atmosphere, the corresponding radiative forcing will increase by 11%. The ocean is a net source of nitrous oxide in the atmosphere. The distribution characteristics of nitrous oxide in many oceans and coastal waters around the world have att...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/025G01N2030/125
Inventor 李玉红詹力扬陈立奇
Owner THIRD INST OF OCEANOGRAPHY STATE OCEANIC ADMINISTATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap