JPH0318912Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a solution analysis spray device used to atomize a solution sample during solution analysis such as emission spectroscopy or atomic absorption spectrometry.

(B) Prior art This type of conventional atomizing device for solution analysis is used by being connected to the ICP torch of an emission spectrometer or the burner part of an atomic absorption spectrometer, but the atomized sample supplied at that time is It is desired that the particle size is small and uniform. When a solution sample is atomized using a nebulizer, the mist contains particles ranging in size from large to small. Therefore, in order to make the particle size of the atomized sample uniform, conventional devices have a double-tube structure with a large volume, or because there is a lot of large-diameter mist near the center of the atomizer nozzle. A structure in which a ball is placed opposite the nozzle is used. Further, in the prior art, a configuration in which a sprayer is connected to a cyclone type particle separation device has been provided (see, for example, Japanese Patent Laid-Open No. 191869/1986).

However, in any of the conventional examples, only a single sprayer is attached to the spray chamber that separates particles, and therefore, when cleaning the spray chamber, a large amount of water is applied to the spray chamber at once. It is not possible to supply cleaning liquid or gas for this purpose, so cleaning takes a long time. As a result, when a large number of samples need to be analyzed one after another, the analysis takes too much time.

Moreover, in order to activate the atomized sample, there are cases where it is desired to preheat the sample, but conventional devices have the disadvantage that the atomized sample cannot be heated efficiently.

(c) Purpose The present invention solves the problems of the conventional method and allows cleaning of the atomization chamber in a short time.This makes it possible to quickly analyze a large number of samples one after another, and also makes it possible to efficiently heat atomized samples. The purpose is to enable you to perform well.

(d) Configuration In order to achieve this purpose, the present invention has the following features:
The following configuration is adopted.

That is, the spray device for solution analysis of the present invention includes a cylindrical body forming a spray chamber and a plurality of sprayers for atomizing a solution sample, and the nozzle portions of the plurality of sprayers and An auxiliary gas introduction pipe is connected, and the nozzle portions of the plurality of sprayers and the outlet of the auxiliary gas introduction pipe penetrate the peripheral wall of the cylindrical body from a tangential direction outward and face the spray chamber. It is characterized by the presence of

(E) Embodiment Hereinafter, the present invention will be explained in detail based on an embodiment shown in the drawings.

FIG. 1 is a longitudinal sectional view of the solution analysis spray device of this embodiment, and FIG. 2 is a sectional view taken along the line - in FIG. In these figures, 1 is a spray device for solution analysis, and this spray device 1 for solution analysis includes a cylindrical body 4 forming a spray chamber 2 and a plurality of (two in this example) sprayers 6 for atomizing a solution sample. Be prepared. A support member 10 having a U-shaped cross section is attached to the upper outer side of the peripheral wall portion 4a of the cylindrical body 4 so as to be concentric with the cylindrical body 4. Further, the lower part 4b of the cylindrical body 4 is narrowed to a small diameter, and a drain pipe 12 is connected to the lower end thereof.
Further, an inner cylinder 14 is disposed inside the cylindrical body 4, and the upper part of the inner cylinder 14 is connected to the upper lid 4b of the cylindrical body 4.
A sample outlet port 16 and a gas separation port 18 are formed in the projecting portion of the sample outlet 16 and the gas separation port 18 .
The sample outlet 16 is then connected to the ICP torch and burner section. On the other hand, an opening 14a opening into the spray chamber 2 is formed at the lower end of the inner cylinder 14. The sprayer 6 includes a liquid introduction tube 20 into which a liquid sample and a cleaning liquid are introduced, and a gas introduction tube 22 into which argon gas or the like is introduced, and one end of the liquid introduction tube 20 is inserted into the gas introduction tube 22. A nozzle portion 26 is formed in which both the pipes 20 and 22 have an air outlet 24. Each nozzle portion 26 is supported by the support member 10, and the peripheral wall portion 4a of the cylindrical body 4 is
is connected to the air outlet 24 of each nozzle part 26.
passes through the support member 10 and the peripheral wall 4a from the outside in the tangential direction of the peripheral wall 4a of the cylindrical body 4 and faces into the spray chamber 2. In addition, 30 is the nozzle part 2 of the sprayer 6.
Similarly to 6, this is an auxiliary gas introduction pipe that penetrates the support member 10 and the peripheral wall 4a from the tangential direction outward of the peripheral wall 4a of the cylindrical body 4 and faces into the spray chamber 2.

When analyzing a solution, a solution sample is introduced from one liquid introduction tube 20, and the gas introduction tube 2 that is paired with this
A gas such as argon is introduced from the nozzle part 2 and the solution sample and the gas are simultaneously ejected into the spray chamber 2 from the outlet 24 of the nozzle part 26. This atomizes the solution sample. At that time, if the particle size is large,
The centrifugal force is also large, and therefore the peripheral wall 4a of the cylindrical body 4
It collides with the inner surface, becomes liquid again, and drains into the drain pipe 12.
be excluded from If the gas pressure from the sprayer 6 is insufficient, auxiliary gas may be blown from the auxiliary gas introduction pipe 30 to enhance the cyclone action. The atomized sample, from which coarse particles have been removed, is placed in the inner cylinder 14.
The sample is guided into the inner cylinder 14 through the opening 14a, moves upward, and is taken out from the sample outlet 16. Further, the gas is separated at a gas separation port 18 . Furthermore, by blowing heated auxiliary gas from the auxiliary gas introduction pipe 30 during analysis, the atomized sample is gasified and analysis can be performed under optimal conditions.

After the analysis, when cleaning the inside of the spray chamber 2, the cleaning liquid is introduced from the liquid introduction pipes 20 of the two sprayers 6, and the gas is introduced from the gas introduction pipes 22 of the two sprayers 6. If necessary, the auxiliary gas introduction pipe 30 is also introduced. Gas will also be introduced from As a result, the inside of the spray chamber 2 is cleaned in a short time, partly because there is no dead space.

Although it is preferable to provide the inner cylinder 14 as in this embodiment because a finer and more uniform atomized sample can be obtained, it is also possible to omit the inner cylinder 14.

(F) Effect The present invention connects the nozzles of a plurality of sprayers and the auxiliary gas introduction pipes to the peripheral wall of a cylindrical body forming a spray chamber, and connects the nozzles of the plurality of sprayers and the blow-off ports of the auxiliary gas introduction pipes. The spray chamber is exposed to the spray chamber by passing through the circumferential wall of the cylindrical body from the outside in the tangential direction of the circumferential wall, so that the spray chamber can be cleaned in a short time.
A large number of samples can be rapidly analyzed one after another. Furthermore, if an auxiliary gas introduction pipe is used, the cyclone effect of the atomization chamber can be promoted, and the particles of the atomized sample can be made more uniform. In addition, the atomized sample can be heated efficiently, providing excellent effects such as being able to perform analysis under optimal conditions.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a vertical sectional view of a spray device for solution analysis, and FIG.
FIG. 3 is a sectional view taken along the - line in the figure. 1... Spray device for solution analysis, 2... Spray chamber, 4
... Cylindrical body, 4a ... Peripheral wall part, 6 ... Sprayer, 2
4...Air outlet, 26...Nozzle part.

Claims (1)

[Scope of utility model registration request] A cylindrical body forming a spray chamber and a plurality of atomizers for atomizing a solution sample are provided, the nozzles and auxiliary gas introduction pipes of the plurality of atomizers are connected to the peripheral wall of the cylindrical body, and the plurality of atomizers are connected to the peripheral wall of the cylindrical body. A spray device for solution analysis, characterized in that a nozzle portion of the sprayer and an outlet of the auxiliary gas introduction pipe penetrate the peripheral wall portion of the cylindrical body from the outside in a tangential direction of the peripheral wall portion and face the spray chamber.