SU94590A1 - The method of introduction of the material under study during spectral analysis in the arc burning zone - Google Patents

Description

For the spectral analysis of silicates, ores, minerals, etc., the direct current arc is most often used. However, this source of excitement is still so imperfect that it is an error in the analysis results and it is possible to limit it: to achieve a high point of data on the whole analysis.

Accuracy given by the arc. The definition of the ENP by introducing and inserting it into it and communicating with it:. by processes of elementalization, excitation of atoms of elements and emission of Svot u1; (: th clouds of arc vapor. A number of different ways of introducing npo6f i into the arc are known. The causes, driving to errors and analysis, are much the same for most of the methods. npH , pa6oje methods of evaporation of the sample, with a sheet of graphite electrode in the hole, the source of error can be glues of fractions of ionic ions and specimens (one-dimensional) and the availability of vapor and vapor in the arc line; 1; ducks during the shooting. The phenomena affect the result in several ways simultaneously. In the nerves, there is a failure in the absolute n relative concentration of elements in the pairs, then the change in conditions of izbuzh, deni and. } ac: end, the change in φ (; p, we and size: the cloud of luminous arc arc, reflecting on the absorption and reabsorption of the emitted light. These factors are difficult to control and partially arbitrary, which leads to poor results.

Ethn and other sources of errors could be traced from other known methods, such as evaporation from a container, points, irosika, introduction of figurative n, paper strips, etc.

The proposed method for the introduction of the material under study: 1 into the burning zone of the arc gives the possibility of eliminating all the serious shortcomings and practically.

The way is different, since the material under study is iomei1st in the thin-walled carbon tube (a straw) and its hole is pushed in the electrode with a uniform SPEED into the space between the electrodes. This achieves the best symmetric and unstable cloud of the studied material.

The drawing shows a device for carrying out the proposed procedure for introducing the test material into the arc burning zone.

Straw (1). filled with sample material (2) is placed in the recess of the part (3). The latter moves upward evenly, at the required speed and introduces a straw together with the sample into the cavity of the electrode (4). dispersed under the electrode (5), due to which a gradual and complete search of the sample occurs with a straw. Ring (6), water cooled, secured

Electrode (4) from the fast (shlyialn. Mica on the gasket (7) isolates the straw from the copper plate (8). Graphite cooler (9) with flowing water); the whale for cooling the silids (8). The shape of the electrode (4) provides a large gradient the temperature of the upper and lower ends of it, and allows economical consumption of domestic coal.The electrode (4) tightly enters the tail part of the hole in the graphite refrigerator (9). The guide hole in the talc plate is performed by sonrik bein solokpnkn with an electrode.

As a coal coking tube, you can use an ordinary coal bottle and burn without access by air: sa pa quartz sticks. Natural straws can be replaced artificially irigotovleiyami. The latter have low mass, high frequency and gallop1) o-. 1: ptsayemost.

11 redef nl obrete and u

The method of introducing the material under study, with spectral analysis in the combustion zone of the ARC through the hole in one of the electrodes, is about that. that, in order to carry out symmetrical and nostow.) but to the size of the cloud, the pseudus material, this heritage places the double-walled coal tube {s) and pushes it through the hole in the electrode with a uniform velocity to the space between the electrolyte ;.).

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