Carbon isotope method for tracing aldehyde ketone pollutants

A technology for carbon isotopes and pollutants, which can be used in measuring devices, instruments, scientific instruments, etc., and can solve problems such as instability, vague conclusions, and large ratio changes.

Inactive Publication Date: 2016-06-15
GUANGXI UNIV
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Problems solved by technology

However, the interpretation of the source by this method of analysis is indirect, and at the same time, due to the large range and instability of the ratio, the conclusions drawn are relatively vague

Method used

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  • Carbon isotope method for tracing aldehyde ketone pollutants
  • Carbon isotope method for tracing aldehyde ketone pollutants
  • Carbon isotope method for tracing aldehyde ketone pollutants

Examples

Experimental program
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Embodiment 1

[0027] In this example, aldehydes and ketones (acetaldehyde, other aldehydes and ketone pollutants are similar to this example) are chosen to simulate known concentrations for sampling and real atmospheric environment samples are collected for experiments to determine their carbon isotope composition.

[0028] Main analytical instrument: German Finnigan company DELTA plus XL Isotope Ratio Mass Spectrometer (EA-IRMS); British GV Company Gas Chromatography-Combustion-Isotope Ratio Mass Spectrometer (GC-C-IRMS)

[0029] (1) Preparation of standard samples of acetaldehyde and acetaldehyde-cysteamine derivatives

[0030] Add 1mL of acetaldehyde solution into a 5mL sample bottle and equilibrate for at least 1h, then seal it with a perforated cap that can hold a chromatographic sampling pad and wait for analysis; mix acetaldehyde and cysteamine hydrochloride (purity 97%) reacted in an aqueous solution with a pH of 8 to 9 for 24 hours, then used CHCl 3 (Analytical pure, used after d...

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Abstract

The invention discloses a carbon isotope method for tracing aldehyde ketone pollutants. The method is characterized in that sources of aldehyde ketone pollutants in atmosphere environment are judged according to occurrence of isotope fractionation or not and the difference of the carbon isotope ratio (delta<13>C value). An experiment result shows that the method has the advantages of good recurrence and high precision of a determination result, and effective overcoming of the defects of traditional concentration measurement methods (EPA TO-11A), can be used to determine the carbon isotope composition (delta<13>C value) of atmosphere aldehyde ketone pollutants in order to realize direct and accurate judgment of the sources of the atmosphere aldehyde ketone pollutants, can be used to trace the sources of the atmosphere aldehyde ketone pollutants as an effective way, is helpful for researching the formation mechanism of atmosphere organic pollution, and provides scientific bases for researches of the atmosphere organic environment pollution.

Description

technical field [0001] The invention belongs to the field of detection and analysis of aldehyde and ketone pollutants in the atmospheric environment, and in particular relates to a carbon isotope method for tracing aldehyde and ketone pollutants. Background technique [0002] At present, the United States EPATO-11A method is widely used in the world to detect the concentration of aldehyde and ketone pollutants in the atmosphere, and methods such as concentration ratio and correlation analysis, namely formaldehyde / acetaldehyde or acetaldehyde / acetone, etc. are used to determine the concentration of formaldehyde and ketone in the atmosphere. Different sources of aldehyde and ketone pollutants such as aldehydes and acetone. However, the interpretation of the source by this method of analysis is indirect, and because the ratio varies widely and is unstable, the conclusions drawn are rather vague. Nowadays, the frequent occurrence of atmospheric compound pollution incidents has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/025G01N2030/062
Inventor 郭送军陈梅何晓朗
Owner GUANGXI UNIV
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