JPH06283133A - Atomizer - Google Patents

Abstract

PURPOSE:To optionally control the atomizing condition and atomization efficiency as desired. CONSTITUTION:A pipe 11 is fixed to the first member 10, and a sample liquid is introduced from the direction C. A rod-like member 14 is arranged on the second member 13 adjustably for its vertical position. The tip of the rod-like member 14 is formed into a knife edge shape, and it is arranged to face the tip of a pipe 11. The vertical position of the rod-like member 14 can be adjusted. Ar gas is introduced into a gas chamber 16 from the direction D, it passes through a gap between the pipe 11 and the rod-like member 14 at a high speed, and a sample liquid is atomized. When the rod-like member 14 is vertically moved, the gas width can be changed, and the atomizing condition and atomization efficiency can be controlled as desired.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an atomizing device for atomizing a sample when the sample is analyzed by a mass spectrometer, an emission spectrometer or the like.

[0002]

2. Description of the Related Art Inductively coupled plasma
led Plasma; hereinafter referred to as ICP) When mass spectrometry of a sample is performed by a mass spectrometer or when emission analysis is performed by an ICP emission spectrometer, it is necessary to atomize the sample. An atomizing device having a double pipe structure as shown in FIG. 4 is used.

In FIG. 4, the inner pipe 1 and the outer pipe 2 are both made of quartz glass.
A sample liquid is introduced from the direction indicated by A in the figure, and a high-speed atomized gas, for example, argon gas is introduced between the inner pipe 1 and the outer pipe 2 from the direction indicated by B in the figure. As a result, the sample liquid discharged from the inner pipe 1 is atomized by the atomized gas at a high speed in the gap portion between the inner pipe 1 and the outer pipe 2.

[0004]

By the way, in the conventional atomizer, since the inner pipe 1 and the outer pipe 2 are integrally formed of quartz glass, the whole atomizer is damaged or damaged. However, the gap between the inner pipe 1 and the outer pipe 2 at the tip may be different or the gap may be different depending on the position because of the machining accuracy. There was a problem that the atomization conditions and atomization efficiency of the atomizer used could not be reproduced well.

That is, G in FIG. 4 shows the gap distance at the tips of the inner pipe 1 and the outer pipe 2, but it is not necessary to make the gap distance G the same in all atomizing devices. It is very difficult in point, and the gap distance G is usually different between the previously used atomizing device and the replaced atomizing device. Further, at the tip end where the atomized sample is ejected, it is ideal that the inner pipe 1 and the outer pipe 2 are concentric, but as shown in FIG. May not be concentric circles, and even in such a case, the atomization conditions and atomization efficiencies differ. In other words, it is very difficult for the conventional atomization device to arbitrarily control the atomization conditions and the atomization efficiency as desired.

The present invention is intended to solve the above problems, and an object of the present invention is to provide an atomizing device capable of arbitrarily controlling atomizing conditions and atomizing efficiency as desired. is there.

[0007]

In order to achieve the above object, the atomizing device of the present invention has a pipe for ejecting a sample liquid, and its tip is arranged so as to face the tip of the pipe. It is characterized by comprising a gap forming member and a position adjusting means for adjusting a gap between the tip of the gap forming member and the tip of the pipe.

[0008]

The atomizing device of the present invention comprises a pipe for introducing the sample liquid, a gap forming member, and a position adjusting means. The tip of the gap forming member faces the tip of the pipe. The distance between the tip of the gap forming member and the tip of the pipe can be adjusted by the position adjusting means.

According to this structure, the sample liquid discharged from the pipe can be atomized by passing the atomized gas at a high speed between the tip of the gap forming member and the tip of the pipe, and at that time, the position adjustment is performed. By adjusting the distance between the tip of the gap forming member and the tip of the pipe by means, it is possible to achieve desired atomization conditions and atomization efficiency. Here, as the gap forming member, as described in claim 2, the tip of the rod-shaped member may have a knife edge shape.

[0010]

Embodiments will be described below with reference to the drawings.
FIG. 1 is a sectional view showing the structure of an embodiment of an atomizing device according to the present invention, and FIG. 2 is a view of the atomizing device shown in FIG. Member, 11 is a pipe, 1
2 is a fixing member, 13 is a second member, 14 is a rod-shaped member, 15
Is a mounting member, 16 is a gas chamber, and 17 is an atomizing hole.

The first member 10 is provided with a through hole, and a pipe 11 for ejecting the sample liquid into the through hole.
Is arranged, and the pipe 11 is
It is fixed to the member 10. Then, the sample liquid is introduced into the pipe 11 from the direction indicated by C in FIG. The cut surface of the portion of the pipe 11 from which the sample liquid is jetted is made to coincide with the upper surface of the first member 10 shown by B in the figure.

A through hole is provided in the second member 13 at a position facing the through hole of the first member 10, and a rod member 14 is arranged in the through hole. This rod-shaped member 14
Is equivalent to the gap forming member of the present invention,
The tip of the rod member 14 is arranged so as to face the tip of the pipe 11. The rod-shaped member 14 is formed of, for example, a columnar member. The diameter of the rod-shaped member 14 may be larger than the inner diameter of the pipe 11. Further, as the material used for the rod-shaped member 14, quartz glass, an appropriate metal or an appropriate resin can be used.

The tip of the rod-shaped member 14 facing the pipe 11 is cut from both sides as shown in FIG.
It is shaped like a knife edge. The cutting angle is arbitrary. In practice, some rod-shaped members whose tip portions are cut at various angles may be prepared so that they can be exchanged as needed. Note that FIG. 3 is a perspective view of the tip of the rod-shaped member 14.

The rod-shaped member 14 is attached to the mounting member 15
Is fixed to the second member 13, but the vertical position of the rod-shaped member 14 can be adjusted. As the method of fixing the rod-shaped member 14, a known and appropriate method may be used.

A gas chamber 16 is formed by the first member 10 and the second member 14, and a predetermined atomized gas, for example, argon gas is introduced from the direction indicated by D in FIG. 1, and the tip of the pipe 11 and the rod-shaped member. It passes through the gap between the 14 tips at high speed. As a result, the sample liquid from the pipe 11 is atomized and ejected from the atomization hole 17.

The size of the atomizing hole 17 is as follows. The width of the atomizing hole 17 in the horizontal direction in FIG. 2 is made narrower than the width of the rod-shaped member 14 in order to prevent gas leakage from the side of the rod-shaped member 14. The vertical spacing of the atomization holes 17 in FIG. 2 is determined by the gap between the tip of the pipe 11 and the tip of the rod-shaped member 14.

According to the above construction, since the gap with the tip of the pipe 11 can be changed by moving the rod-shaped member 14 up and down, the atomization conditions and atomization efficiency can be controlled as desired. . Therefore, even when the pipe 11 or the rod-shaped member 14 is replaced, the same atomization condition and atomization efficiency as before the replacement can be reproduced.

Further, in the structure shown in FIGS. 1 and 2, the gap between the tip of the pipe 11 and the tip of the rod member 14 is automatically changed so that the same atomization is always performed when the pipe 11 or the rod member 14 is replaced. It is also possible to atomize the sample liquid under the conditions and atomization efficiency. For example, the rod-shaped member 14 is moved to the second member 13 by a known automatic control means such as motor driving.
On the other hand, the rod-shaped member 14 may be moved up and down automatically from the outside so that the gas pressure in the gas chamber 16 reaches a predetermined value.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and various modifications can be made. For example, although the rod-shaped member is used to form the gap in the above embodiment, the pipe 11
Any material may be used as long as it can form a gap through which the atomized gas can pass at a high speed with the tip of the rod-like member, and particularly when a rod-shaped member is used as in the above embodiment. The shape of the tip portion facing the pipe 11 may be any shape as long as the sample liquid can be atomized.

As a matter of course, the structure for moving the rod-shaped member 14 up and down or the structure for fixing it to the second member 13 can be selected appropriately. Furthermore, although the pipe 11 and the rod-shaped member 14 are described as being on the same straight line in the above embodiment, this is not an essential requirement of the present invention, and the rod-shaped member 14 may be arranged in an oblique direction. In short, it suffices that the tip of the rod-shaped member 14 and the tip of the pipe 11 face each other.

[0021]

As is apparent from the above description, according to the present invention, the gap through which the atomized gas passes can be changed as desired, so that the atomization conditions and atomization efficiency can be desired. Therefore, even if the pipe or the gap forming member is replaced, the same atomization condition and atomization efficiency as before can be reproduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an exemplary embodiment of the present invention.

2 is a view of the atomizing device shown in FIG. 1 viewed from a direction indicated by A. FIG.

FIG. 3 is a diagram showing an example of a tip shape of a rod-shaped member 14.

FIG. 4 is a diagram showing a configuration example of a conventional atomizing device.

FIG. 5 is a diagram for explaining a problem of a conventional atomizing device.

[Explanation of symbols]

10 ... 1st member, 11 ... Pipe, 12 ... Fixing member, 13
... second member, 14 ... rod-shaped member, 15 ... mounting member, 16 ...
Gas chamber, 17 ... Atomization hole.

Claims (2)

[Claims] 1. A pipe for ejecting a sample solution, a gap forming member whose tip is arranged to face the tip of the pipe, and a gap between the tip of the gap forming member and the tip of the pipe. An atomizing device, comprising: a position adjusting means for adjusting the. 2. The atomizing device according to claim 1, wherein the gap forming member is a rod-shaped member whose tip is formed into a knife edge shape.