SU515063A1 - Chromatograph - Google Patents

Description

one

Isotope is not related to chromatography and can be used to analyze the composition of liquids, gases, solids and polymers.

Known chromatograph containing

chromatographic column detector and recording device.

However, the information obtained does not contain information on the structure of the components of the mixture being analyzed and for identifying components of component 1 it is necessary to use other types of analysis (for example, EPR, NMR, X) or to resort to calibrating the chromatograph using reference compounds.

The aim of the invention is to identify compounds whose molecules have double bonds, and to create an automatic photograph that would allow, along with the usual chromatogram, to obtain information on the number of double bonds in the components of the sample.

This is achieved by the fact that the chromatograph is additionally equipped with an ozone generator, the output of which is equipped with a flow reactor connected to the detector output.

or directly with the exit of the chromatographic column, and an ozone detector installed at the exit of the reactor).

The sequential connection of the chromatographic detector and the flow reactor with the ozone detector is possible by T1elco if the components of the analyzed & 1 &1; C) and passing through the chromatographic detector do not undergo chemical transformations, for example, if a spectrophotometric and radiative heat detector is used detectors. If the chromatographic detector causes chemical transformations in the components of hfobe, the flow reactor with the ozone detector is switched on in parallel with the chromatography detector, i.e. the flow from the column is divided into two, one of which is passed through the chromatographic detector, and the other through the flow detector . In a flow reactor, ozone interacts with components at the double bond site. With a snn. The xentravia of ozone is proportional to the amount of double bonds in the component under study, provided that the gas flow rates from the ozone generator and the flow from the column are constant.

In the event that the test components entering the flow reactor are liquid, the reactor can be designed as a bubble reactor with a low-temperature cooling system to reduce liquid entrainment in the form of vapors with the leaving gas. If the components of the gas oils are vaporized, the reactor can be made in the form of a gas reactor with mixers for gases and vapors entering it,

The change in the ozone concentration in the gas at the outlet of the reactor, determined by the ozone detector (by spectrophotometry of the gas cell at nm, by thermometric, chemiluminescent, and other methods), allows determining the quantitative content of double bonds.

Studies have shown that the reaction rate of ozone with a double bond is 4-6 times higher than the reaction rate. with other functional groups, which creates prerequisites for high selectivity of the analysis and allows for marking the end time of the reaction by changing the ozone concentration at the outlet of the flow reactor in the gas phase.

The drawing shows a schematic diagram of the chromatograph.

The chromatograph contains chromatographic column 1, located in the thermostat 2, chromatographic detector 3 with

recorder 4, a sample injecting device 5. The output of chromatographic detector 3 is connected to a remote reactor 6, into which gas containing the known ozone condensate is supplied from an ozone generator 7. An ozone detector 8 with an ozone concentration monitor 9 is installed at the outlet of the gases EZ of the flow reactor 6 ,

The chromatograph works as follows.

The test sample is introduced into the column where it is divided into components that are analyzed as it passes through detector 3, the signals of which are recorded on recorder 4. From the chromatographic detector 3 components are fed to flow reactor 6 where they interact at the place of double bonds with ozone from the ozone generator 7. The concentration of ozone in the gas exiting the flow reactor, as measured by the ozone detector 8, indicates the number of double bonds in the components.

Claims (1)

Invention Formula A chromatograph containing a chromatographic column, a detector and a recording device, characterized in that, in order to identify compounds whose molecules have double bonds, it is equipped with an ozone generator, the output of which is set to FLOW reactor connected to the detector output or directly to the chromatographic output column, and an ozone detector installed at the outlet of the flow reactor.