REFRACTOMETRIC DETECTOR WITH LASER MODULE AND CHROMATOGRAPHIC CHANNEL IN NON-METAL DESIGN FOR LIQUID CHROMATOGRAPHY AND METHOD OF DETECTING ORGANIC AND INORGANIC SUBSTANCES WITH REFRACTOMETRIC DETECTOR Russian patent published in 2016 - IPC G01N21/00 

FIELD: measuring equipment.

SUBSTANCE: refractometric detector includes measuring optical-mechanical unit, including optically-connected light source, a lens, slot diaphragm, a flow-through a quartz cell, a prism in the form of trapezium with sharp angles 45° for adjustment of the detector, a plane-parallel quartz plate car, two-platform photodiode, as well as electronic unit. Two fluoroplastic plate of heat-treated fluoroplastic are installed in seats of upper and lower parts of the metal housing of the cuvette and are laid on the ends of quartz cell. In metal housing of the cuvette are threaded holes with taper end and coaxially to them in fluoroplastic plates there are holes for eluent flow through analytical and comparative channels of the cuvette and for installation in them of fluoroplastic capillaries, which are fixed in metal case and cover of the cuvette with ferule screws. Light source used laser module with monochromatic light flux in the form of a point 1 mW intensity at wave length 650 nm. Quartz tray is made in the form of a rectangular parallelepiped with in-series located three separate through channels, triangular in cross section with acute angle of 45°. Hypotenuse triangular sections of the first and third channels of the cuvette are made in the immediate vicinity of the legs of the second channel section and aligned with it along the length and orientation in space. Formation of slit diaphragm is plates made of blackened brass with thickness of 50 mcm.

EFFECT: high sensitivity of determination of analysed organic and inorganic substances and stabilisation of drift of zero line.

6 cl, 2 dwg, 3 tbl