JPS5810633A - Sample atomizer for zeeman atomic-absorptiometer - Google Patents

Abstract

PURPOSE:To reduce working time and improve safety through permitting an optical axis position regulating operation without necessity to place a magnet on a magnet table, by using as means for regulating the magnetic optical axis position an optical axis fixture having the same positional relationship with the magnet. CONSTITUTION:A burner head 4 connected to a chamber holder 2 and aburner chamber 3 is disposed on a sample holder 1. A magent 7 is disposed outside the burner head 4 is order to apply a magnetic field to the flames formed at the top of the burner head 4. In case of carrying out the operation for regulating the optical axis position of the magnet 7, an optical axis fixture 16 having substantially the same dimensions as the magnet 7 is installed on a cylindrical body 17 fixed to a magnet holder 11 by means of counter-sunk screws 19, and regulation is effected thorugh regulating screws 14 while observing with naked eyes so that an optical axis 12 coincides with the center of an optical axis hole 20. Then, the optical axis fixture 16 is upwardly drawn out, the magnet is fitted instead to complete the magnet optical axis position regulating operation. Thereby, it is possible to accurately and speedily perform the magnet optical axis position regulating operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an atomization device for a Zeeman atomic absorption spectrophotometer that can effectively apply a magnet or a fan to a chemical flame. The present invention relates to an atomization device equipped with a means for performing operations.

FIG. 1 is a plan view of the prior art. FIG. 2 is a front view of the prior art. 1 and 2, a burner head 4 coupled to a chamber stand 2 and a burner chamber 3 is placed on a sample stand 1, and a flame 6 is formed from a slit 5 in the head of the burner head 4. On the other hand, a magnet 7 is provided outside the burner head 4 in order to apply a magnetic field to the flame 6 on the burner head 4, and the magnet 7 is fixed to a magnet stand 11 by a fixing plate 9 and screws 10. In this device, the magnetic field strength is strongest at the center of the pole piece 8 of the magnet head, and if this area and the optical axis 12 do not match as shown in Figure 2, good sensitivity cannot be obtained and reliable data cannot be obtained. I can't get it. The optical axis position of the magnet is adjusted by turning the adjustment screw 14 on the head of the column 13, but the magnet has a width of 16 cr.
n, height 15cWI, depth 14crn, weight 17Kg
Because the adjustment screw did not rotate smoothly,
Another problem is that tools such as screwdrivers and spanners used when turning the adjustment screw 14 and the NAND 15 are absorbed by the magnet, making the work difficult. Magnets are sensitive to impact, and when a tool that is attracted to the magnet hits the magnet, the impact part can be damaged, which can lead to fatal problems for the device. In addition, to adjust the optical axis position of conventional magnets, a piece of white paper was placed in the center of the magnet's pole piece and observed with the naked eye, but this method did not allow accurate optical axis alignment.

In addition, the burner head 4 is often prepared with a one-slot burner, a high-temperature burner, etc. depending on the type of frame that matches the metal element to be analyzed, and is often replaced each time.It is also removed when cleaning the inside. There are many. In this device, when replacing the burner head 4, do you have to remove the magnet and reassemble it? When doing so, the relative position of the magnet and optical axis could not be reproduced, so it was necessary to align the optical axis of the magnet each time, which required a great deal of effort.

The object of the present invention is to obtain a sample atomization device for a Zeeman atomic absorption spectrometer that can accurately and quickly adjust the optical axis position of a magnet by using an optical axis installed on a cylindrical body on a magnet stand. It is.

The present invention uses an optical axis holder having the same positional relationship as the magnet as a means for adjusting the optical axis position of the magnet, thereby making it possible to adjust the optical axis position without placing the magnet on the magnet stand.
Compared to conventional products, work time has been significantly shortened and safety has also been significantly improved.

FIG. 4 is a front sectional view of the sample atomization device of the Zeeman atomic absorption spectrophotometer of the present invention. In FIG. 4, a burner head 4 connected to a chamber stand 2 and a burner chamber 3 is installed on a sample stand 1, and a magnet is attached to the outside of the burner head 4 in order to apply the entire magnetic field to the flame formed at the head of the burner head 4. 7 is deployed. It has long been known in the Zeeman atomic absorption spectrometer that a good Zeeman effect can be obtained by applying a magnetic field to the flame on the burner head.

In the present invention, a cylindrical body 1 is provided between the magnet 7 and the magnet stand 11.
7 is provided, and the cylindrical body 17 is fixed to the magnet stand 11 with a countersunk screw 19. Furthermore, the magnet 7 has a hole in the center that connects with the outer cylinder of the cylindrical body 17, and a pin 18 is placed on the side of the cylindrical body.
It is located by

In this device, the magnetic field frequency is strongest at the center of the pole piece 8 at the head of the magnet 7, and it is necessary to adjust the position by moving the magnet 7 so that this position coincides with the optical axis 12, as shown in Figure 4. . If the positional relationship between the magnet and the optical axis deviates, problems such as not being able to obtain good sensitivity will occur. The magnet position adjustment mechanism in this apparatus is performed by adjusting screws 14 and nuts 15 on the heads of columns 13 provided on both sides of sample stage 10. In FIG. 3, an adjustment screw 14 having a stepped portion in the middle is screwed into the column 13. When a flathead screwdriver is inserted into the groove of the head of the adjustment screw 14 and the adjustment screw is turned, the magnet stand 11 held by the stepped portion of the adjustment screw 140 moves up and down together with the adjustment screw 14. Furthermore, since the diameter of the hole into which the adjustment screw 14 of the magnet stand 11 is inserted is larger than the outer diameter of the head of the adjustment screw 14, the magnet stand 11 can be moved freely by the size difference.

As described above, after the vertical, front, back, left and right adjustment work of the magnet stand 11 is completed, the magnet stand 11 is fixed with the nut 15.

With conventional products, when aligning the magnet with the optical axis, the work was done with the magnet placed on the magnet stand 11, but tools such as a flathead screwdriver to turn the adjustment screw 14 and a spanner to turn the nut 15 are required. However, it was difficult to work with because it was attracted to the magnet. As a countermeasure, tools made of non-magnetic materials are commercially available, but they are expensive and have a short lifespan, making them difficult to put into practical use. Furthermore, since the magnet of this device has a strong magnetic field strength of approximately 10 kg, there is a risk of injury due to fingers getting caught between the magnet and the attracted tool, which poses many safety problems. This proposal solves all the problems of the prior art by making it possible to adjust the optical axis position without placing a magnet on the magnet stand. Next, the operation of adjusting the optical axis position of the magnet according to the present invention will be described.

First, as shown in FIG. 5, the optical shaft 16 is installed on the cylindrical body 17. The optical axis holder 16 has an optical axis hole in the upper part, and the large hole in the center is connected to the outer cylinder of the cylindrical body 17 without a gap, and is positioned by a pin 18 set on the side of the cylindrical body.

The optical axis 16 and the magnet 7 of the present invention have approximately the same dimensions. In other words, both the magnet 7 and the optical axis have a large hole in the center, but the diameter of this hole and the hole position where the pin 18 is inserted on the side of the cylindrical body 17 are exactly the same, so it is easy to pull it out onto the valve of both. It has a removable structure. In addition, in FIGS. 4 and 5, the distance H7 from the bottom of the optical axis hole 20 to the optical axis hole 20
and the distance H from the bottom of the magnet 7 to the center of the pole piece 8 are also equal. As described above, the relative dimensions of the optical axis layer 16 and the magnet 7 are made equal, and the optical axis layer 16 is first placed on the cylindrical body 17, and the adjustment screw 14 is used so that the optical axis coincides with the center of the optical hole. Adjust with. Next, the optical axis layer 16 is pulled upward and a magnet is inserted in its place, thereby completing the work of adjusting the optical axis position of the magnet.

The optical axis position adjustment work according to the present invention is easy because it is performed while observing with the naked eye so that the optical axis is aligned with the optical axis hole 20 on the upper surface of the optical axis layer 16. Furthermore, although the magnet weighs approximately 17 kg, the optical axis layer weighs less than 1 kg4, making work easier. Also, since there is no need to use tools for adjustment work near the magnet,
You can work safely without tools being attracted to the magnet. Furthermore, since the magnet is simply mounted on a cylindrical body and can be easily removed by pulling it upward, cleaning the burner head and the inside of the burner chamber, as well as cleaning the magnet itself, is easy. Furthermore, since the position of the magnet is also reproduced using the positioning pin, there is no need for the optical axis position adjustment work that was performed every time the magnet was removed.

FIG. 6 is a front view of a sample atomization apparatus according to an applied example of the present invention. The side of the cylindrical body of the present invention is equipped with a positioning pin, and as shown in FIG. A structure having a hole into which the ball 21 is inserted also functions similarly to the present invention. In this case, the magnet 7 has a structure that allows it to rotate around the outer periphery of the outer cylindrical body 17, so the entire sample atomization device is surrounded by the wall.
The structure of the present invention is effective when the burner head cannot be replaced without rotating the magnet.

The magnet of this device has a strong magnetic field strength of approximately 10 kg, so when you bring a tool close to it, the tool may collide with the magnet, damaging a part of the magnet, or causing injury if your finger gets caught between the tool and the magnet. However, the present invention has solved all of these problems.

Additionally, compared to conventional products, the work time for adjusting the magnet's optical axis position was reduced by approximately half.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a conventional sample atomization device, FIG. 2 is a front view, FIG. 3 is a detailed view of the adjustment mechanism of the magnet stand, and FIG. 4 is a front view of the sample atomization device of the present invention. FIG. 5 is a diagram in which an optical axis layer is installed in place of a magnet in the sample atomization device of the present invention.
FIG. 6 is a front view of a sample atomization device equipped with a positioning mechanism next to a magnet as an application example of the present invention. DESCRIPTION OF SYMBOLS 1... Sample stand, 2... Chamber stand, 3... Burner chamber, 4... Burner head, 7... Magnet, 11
... Magnet stand, 12... Optical axis, 13... Pillar, 14.
...Adjustment screw, 15...3rd port Fig. S

Claims (1)

[Claims] 1. An analysis sample is introduced into a chemical flame formed above a removable burner head that is inserted into a cylindrical burner chamber, and a magnet is installed near the burner head so that a magnetic field can be effectively applied to the chemical flame. In the sample atomization device of the Zeeman atomic absorption spectrometer equipped with A sample atomization device for a Zeeman atomic absorption spectrophotometer, characterized by comprising adjusting means and a positioning mechanism for a magnet and a cylindrical body.