SU569943A1 - Ionizing detector for gas chromatography - Google Patents

Description

The invention relates to detectors for gas chromatography, in particular, to ionization detectors with a radioactive radiation source.

An ionization gas analyzer is known, the sensor of which is an ionization chamber with potential and measuring electrodes, between which are placed two pairs of grids fed by autonomous sources of pulsed voltage. (The analyzed gas is ionized by a radioactive source placed on the pot electrode. If the time of flight of the ion between the grids coincides with the long supply pulse, then these ions will be recorded by the measuring electrode. This is the basis of the gas analysis selectivity. However, such a device has an unreliable design, moreover, it observes with a substantial loss of ions during their passage by the Mete nets, and with an increase in the amplitude of the pulse, the losses increase due to the recombination of ions and mesh ,;

Also known ionization sensor, containing potential and measuring 25

5J electrodes are a set of grids with them. A source of ionization serves as a radioactive radiation trap mounted on a potential electrode. In this detector, ion selection is based on the use of the dependence of the velocity of ions in an electric field on the mobility

The disadvantage of this device. there is a significant loss of ions at mk by passing through 5 grids, and with an increase in voltage the losses increase due to the recombinant; ion on the grid.

A non-recombination detector for gas chromatography is known, containing a measuring electrode, a choke for entering the test gas, an electrolyte electrode connected to a voltage source, a radioactive radiation source installed at the choke for analyte, and an output choke,

Claims (1)

In the well-known detector, the ionization and detection zones are separated and used. Internal gas friction forces for transporting analytes to the detection zone,. Uncontrolled impurities in the carrier gas (for example, oxygen E, nitrogen) create a background; the output current in the detection zone is VTO that does not trigger. It does not allow for the realization of the unerobeditization method of anatise, the chain of the invention is to stress the selectivity of the detector when analyzing things with different ion mobility. This is achieved by the fact that between the nozzle of the input of the analyzed gaea and the target sample there is a datascope located on the autorod, connected to an autonomous terminal. Thanks to the installation of a pole creating a lop-field in relation to the neck {1 in the vector of ovaries, which is carried by a stream on the grains of the ohiigash (current efficiency), it is possible to change the selectivity of the dimension. In this case, the speed of the speed does not consist of the speed of the aonotsak, the velocity along the transverse zero in the velocity along the extended field (between the potential spectrometer and the spectrometry), the resulting BOiia wave) and the electrode aperture electrode, he doesn’t generate a signal from the Stora signal in the circuit of HorosneKtiWRA, so the ashlil is the same for both the C5 ществ ществ ад {гей гей и гей tix movement | nevertheless, it is possible to pick up that B e ycncesis {due to the regular regulation of the distribution of the raisi% at 1% of the sign ii | om ibia &ro; Call the driver & Trora: 2 "Signature 3; Use a potential electrode with source 4 located inside it, an additional electrode 5, connection 6 fms gas outlet and autonomous sources of charge, 7 and 8. The device works as follows, and The carrier with the analyzed substances of the fitting 3 is ionized by the ionization source 4,. The negatives formed and the complexes are carried out. gas flow no-no, septa, Iorah with greater mobility sobpiJioTCH on the additional electrode and ions in complexes with 1 lower mobility are carried by the gas flow to the measuring apache Such a detector also allows you to simultaneously selectively analyze some components in the measurement electrode, and others in the circuit of the additional electrode ,.: Detection test results show - PC its high efficiency, -; The formula invented by the IoviShaa children for a gas cromatograph containing a vimeru, measured by eKe1 |} ode, the fitting for the input of the gas being impregnated is a potential eKt electrode connected to the source of wapr with W I | radio source izpucheni || utavadenny in the unit for input of the procession being analyzed and outputting the nozzle, one hundred and two hours - C) ws and those tem | podvlk chvvvy & in an autonomous source naprvzhe-. neither . . . , . stitnejt