SU1226307A1 - Chamber for spraying thin-layer chromatographic plates - Google Patents

Abstract

The spraying chamber for thin-layer chromatographic plates allows for improved durability and reliability, safety and simplifies the design. the account that the bump is made in the form of a square, one side of which is rigid; fixed on the nozzle and positioned in relation to it at an angle of 128-130 °, and the other side is relative to the first one at an angle of 125-127, while the bump stop is installed so that it separates the fan from the vapor flow from the chamber. 1 il.

Description

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The invention relates to chromatographic analysis, in particular, to the arrangement of chambers for spraying thin-layer chromatographic plates with chemical reagents, and can be widely used in analytical chemistry, biochemistry, biology, geochemistry, medicine, agriculture, etc. for the analysis of organic and inorganic substances.

Chambers for spraying thin-layer plates after the knowledge of chromatographic separation are known, which are cone-shaped boxes made of chemically inert material lj,

A disadvantage of this device is that it does not have an autonomous device for sucking aggressive substances out of the chamber and requires connection to a special ventilation system.

Closest to the invention in its technical essence and the effect achieved is a chamber for spraying thin-layer plates, comprising a housing, a baffle and a vent with a fan installed in the vent after the crash. As reagents used for spraying the plates, chemical organic containing reagents

solvents (methanol, ethanol, ace-air injected by a fan.

tone, etc.), as well as organic and inorganic acids (acetic acid, phosphoric, sulfuric, hydrochloric, etc.), alkaline solutions 2.

However, this requires, in order to improve safety and reliability in operation, the manufacture of a fan in an explosive and corrosion-resistant design, since it is washed by a stream of aggressive reagents, and 45 this, in turn, complicates and increases the design of the valve. of the torus and, therefore, of the camera itself,

The purpose of the invention is to increase durability, reliability, safety of work and simplify the design of the camera,

This goal is achieved by the fact that in the chamber for spraying thin-55 aloe chromatographic plates, comprising a casing, a baffle and a vent with a fan, pick up the concentration of contaminated air that is thrown into the cleaning device, which enhances safety when working with the camera.

The presence of a frame for mounting the sprayed thin-layer plate rotatably around the longitudinal axis allows the plate to be sprayed at an angle of various sizes, which improves the quality of the surface treatment of the plate with a chemical reagent. In addition, the ability to rotate the frame around the longitudinal axis allows you to adjust the speed of the suction air from the working volume of the chamber and thereby increase or decrease the effect of vapors of the chemical reagent, which also improves the quality of the chemical direction of the separated substances on the thin layers of the plates.

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the nickname is made in the form of a square, one side of which is rigidly fixed on the nozzle and is located in relation to it at an angle o (, 128-130, and the other side is located in relation to the first one at an angle cij 1 25-127, with this the bump is installed that it separates the fan from the vapor flow from the chamber.

Experimental studies have established that the deviation of the angle o is. to a large extent reduces the linear flow rate, and reducing the angle significantly increases the resistance to air flow. The choice of the side length of the square 35-50 mm provides directional flow along the wall of the chamber. Increasing the specified size of the side of the square in a larger direction while reducing the angle reduces the flow rate in the pipeline, which leads to the termination of the suction of air from the chamber.

Installing a fan in front of the screen in the clean air zone simplifies the design of the chamber, since it does not require a complicated design of the fan in an explosion-proof and corrosion-resistant design, and also increases the reliability of the chamber. Suction of contaminated air from the chamber and mixing with clean

The concentration of contaminated air that is thrown into the cleaning device is increasing, which increases safety when working with the camera.

The presence of a frame for mounting the sprayed thin-layer plate rotatably around the longitudinal axis allows the plate to be sprayed at an angle of various sizes, which improves the quality of the surface treatment of the plate with a chemical reagent. In addition, the ability to rotate the frame around the longitudinal axis allows you to adjust the speed of the suction air from the working volume of the chamber and thereby increase or decrease the effect of vapors of the chemical reagent, which also improves the quality of the chemical direction of the separated substances on the thin layers of the plates.

The drawing shows the proposed device, a longitudinal section.

The thin layer chromatogram spraying chamber comprises a housing 1 in which a frame 2 is mounted so as to be rotatable around a longitudinal axis. On frame 2 in front of window 3 there is a sprayed thin layer plate 4. The case is connected to the exhaust pipe to one of the walls of which a baffle 6 is rigidly attached. A fan 7 is installed in the exhaust pipe in front of the baffle 6.

The device works as follows.

The sprayed thin-layer plate 4 is mounted on frame 2. Through the window 3 of the cider, the plate is sprayed with a developing chemical reagent. The air blown by the fan 7 into the exhaust pipe, due to the presence of the bump stop 6 which ensures the redistribution of the flow between the outer and outer wall of the latter, is mixed with the gas stream sucked from the housing 1 and discharged into the purification plant. As the concentration of aggressive substances at the outlet of the chamber decreases, the degree of the effect of these substances on the fittings of the cleaning device decreases, which contributes to an increase in its service life.

The positive effect of using the proposed device in comparison with the known ones is expressed in the following.

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The elimination of direct contact of the fan engine with vapors of organic solvents and acids makes it possible to use engines instead of engines in a special explosion-proof and corrosion-resistant design, engines in the usual version, which greatly simplifies the design of the chamber and, therefore, reduces

10 is the cost of its manufacture. In addition, the safety of working with the camera is enhanced, both by installing a fan outside the action of solvent vapors and acids,

15 also because the exhaust air from the chamber is mixed with a large amount of clean air blown by the fan. At the same time, the quality of the sprayed thin-layer plates is improved.

Claims (1)

Invention Formula A chamber for spraying thin-layer chromatographic plates, comprising a housing, a chimney and a vent with a fan, characterized in that, in order to increase durability, reliability, safety and simplify the design of the chamber, the chipper is designed as an angle, one side of which is rigid fixed on the nozzle and positioned in relation to it at an angle o ;, 128-130, and the other side is located in relation to the first one at an angle “2 125-127, while the chute is Q so that the fan separates from the flow vapors from cameras. thirty five Editor A.Shishkin Compiled by A.Tevlin Tehred L.Oleynik Proofreader M.Djatchik Order 2123/41 Circulation 778 Subscription VNIIPI USSR State Committee on inventions and discoveries 113035, Moscow, Zh-35, Raushsk na6., d.4 / 5 Production and printing company, Uzhgorod, Projecto st., 4