SU501339A1 - Chromatorhm Analyzer - Google Patents

Description

one

The invention relates to a technique for determining the composition of organic compounds in food technology, such as sugars, lipids, etc., and can be used to quantify these substances, as well as to control the whiteness or color of dry products, optical density or color of solutions.

Instruments are known in which quantitative determinations are carried out by photometry in transmitted or reflected light of colored spots using the integration of a light absorption curve, during which the area formed by the resulting curve and the "zero optical density" line are determined.

An example of such a device can be a device containing a light source, optical elements installed in the measuring and reference channels, a photodetector with a rotating mechanism, a recording device.

The drawbacks of modern instruments for the quantitative determination of separated substances are the low accuracy of integration of light absorption curves, the relatively long transition from one type of measurement to another due to the preliminary replacement of blocks and the need for adjustment.

The purpose of the invention is to improve the accuracy and speed up the analysis process.

The goal is achieved by introducing an optical deflection element into the device, for example a mirror, with the possibility of its synchronous rotation with the photodetector around an axis coaxial with the direction of the reference beam and passing through the specified deflection element.

FIG. 1 shows the optomechanical

device layout; in fig. 2 - turning unit

transmitted light measurement circuits; on

FIG. 3 - the same node in the reflected light.

The analyzer consists of a differential

a two-beam optical system in which one beam is a reference, the other is measuring, a photodetector, a recording and integrating device, a device for synchronous movement of the sample carriage

and electronic pulse counter.

The device works as follows. The light flux from the light source 1 passes the collimator lens 2, a slit diaphragm 3 mounted on the carriage 4 s

a two-coordinate movement, light filters 5 detuned on the rotary disk 6. The prism system 7 divides the luminous flux into two, which with the help of prisms 8 and 9 are directed to the focusing lenses 10 and 11. The light fluxes 12 and 13 are modulated by electro / 5

1621

Compiled by M. Dedlovsky Tehred M. Semenov

Editor N. Call yes

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TSNIIPI State Committee of the Council of Ministers of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Printing house, Sapunova Ave., 2

Proofreaders: V. Petrova and O. Danisheva