UNIVERSAL ANALYSER FOR VAPOUR-GAS SAMPLES AND LIQUIDS AND SUBSTANCES ON SURFACE (VERSIONS) Russian patent published in 2014 - IPC G01N30/00 

FIELD: chemistry.

SUBSTANCE: according to version 1, the universal analyser of vapour-gas samples and liquids and substances on a surface includes a sampling tube 1 with a dust filter, an ionisation chamber 2 (IK-1) of a photoionisation detector (FID-1), having a detachable electrodeless ultraviolet (UV) lamp (3 signals), an electrometer amplifier 3 (EM-1) with a microcomputer and an indicator, an air pump 4 and a housing for heat insulation, protection from external light and shielding. The sampling pipe 1 with a dust filter is connected to the ionisation chamber 2 (IK-1) of a photoionisation detector (FID-1), and the electrometer amplifier 3 (EM-1) with a microcomputer and an indicator and the air pump 4 are connected to the ionisation chamber 2 (IK-1) of the photoionisation detector (FID-1). In the ionisation chamber 2 (IK-1), on the opposite side of the UV lamp, there is a removable window 5 (additionally 5 signals), a detachable chamber 6 (SK), connected to the IK-1 2 of FID-1 via a gas supply in series or in parallel, the electrometer amplifier 7 (EM-2) with a microcomputer and an indicator. The detachable chamber 6 (SK) is an ionisation chamber 8 (IK-2) of a photoionisation detector (FID-2) (for parallel connection of 18 signals) or an ionisation chamber 9 (IK-3) of a photoemission detector (FED) (for parallel connection of 21 signals) or a detachable chamber 10 (SK-3) (78 signals), having a photocell 11, hermetically attached to the window of the plate opposite the UV lamp and at least one side window 12 with glass. The glass is sealed and lies at an angle of less than 90° to the base of the chamber. Using non-metallic spacers, the glass is successively fitted with at least one removable light filter 13 with a photomultiplier 14 and/or at least one diffraction grating 15 with adjustment and a photomultiplier 16. Identification and determination of concentration are possible when the analyser is calibrated on substances based on characteristic signals.

EFFECT: wider range of determined substances, wider range determined concentrations, high accuracy of calibration, high accuracy of analysis.

5 cl, 1 tbl, 15 dwg