JPS5850451A - Burner for flame spectrochemical analysis - Google Patents

Abstract

PURPOSE:To emit a hydrogen flame stably by introducing a flow adjustable stabilizing gas between a cylindrical outer burner and an inner burner provided therein. CONSTITUTION:An atomizing gas Gb is introduced to atomize a sample solution 11 in a body 6 of an atomizing chamber. On the other hand, a fuel gas Gc is introduced and mixed thereinto, stored in the body 6 thereof and then, an ignition is made at the opening 1 of an outer burner. With the ignition, a large outer flame is formed at the upper part of the opening 1 of the outer burner. The outer flame is unstble due to the disturbance of outside air but at the same time, an ignition inducting opening 3 opened works to form a small inner flame at an opening 2 of the inner burner. A stabilizing gas Ga is introduced gradually into an introduction tube 4 to put out the outer flame, leaving the inner flame alone. At this point, the ignition induction opening 3 is closed and the stabilizing gas Ga is regulated whereby the inner flame becomes very stable. The burner thus arranged accomplishes the PHO molecular emission by a hydrogen reducing flame in a very stable manner.

Description

[Detailed description of the invention] The present invention relates to a burner device for flame photoanalysis.

Flame light analysis that utilizes the light emitted from a flame is simple and highly sensitive, and is therefore widely used in the analysis of trace components in environmental water and clinical tests in the medical field.

However, there is still a lot of room for improvement regarding the traditional flame light analysis burner, which is the heart of this process, especially when it comes to the analysis of phosphorus, which has become a socially important issue in recent environmental analysis. (Well, conventional burners have the problem of low sensitivity and poor stability. In other words, in a hydrogen reduction flame with excess hydrogen gas, 528n due to PH0 molecules
Although it is known from overseas literature that the flame rays emit strong light, it is impossible to emit light with good reproducibility using conventional flame analysis glasses.

SUMMARY OF THE INVENTION The present invention was made in order to solve the above-mentioned conventional problems, and an object of the present invention is to provide a flame optical analyzer device that can emit light from a hydrogen flame in a safe and stable state. This is what I did.

That is, the burner device for flame optical analysis of the present invention has a cylindrical burner main body which has an inlet tube through which stabilizing gas is introduced in an adjustable flow rate at its lower part, and an external burner opening at its upper part. , a cylindrical internal burner penetrating from the bottom of the burner body and having an internal burner opening inside the burner body is provided, and a cylindrical internal burner is provided in the atomization chamber in which the atomized sample solution can be mixed with fuel gas and stored. It is constructed by opening the lower part of the internal burner and further providing an ignition guide opening that can be opened and closed at a position below the internal burner opening in the burner body.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a vertical cross-sectional view of a main part of a burner device for flame light analysis in this embodiment.

First, as shown in the drawing, this burner device for flame light analysis is composed of two parts: a cylindrical burner body 12 made of Pyrex or quartz glass, and an upper and lower part of a sample spray chamber 16. An external burner opening 1 is formed in the burner body 12, and a stabilizing gas introduction pipe 4 is connected to the lower part of the burner body 12, through which stabilizing gas Ga can be gradually introduced in the direction of the arrow.

Next, the sample solution 11 is introduced into the sample spray chamber 16 by the atomization gas Gb supplied from the atomization gas introduction pipe 9, and while being atomized through the atomizer 7, the sample solution 11 is introduced from the fuel gas introduction pipe 1o. A spray chamber main body 6 is provided which can mix and store fuel gas Gc, and a drain 8 is provided at the bottom of the spray chamber main body 6 to discharge condensed liquid.

Further, a cylindrical internal burner 14 is provided, which has an internal burner opening 2 in the burner body 12 and whose lower part opens into the spray chamber main body 6, and the lower opening is used to connect the sample and fuel. A gas introduction pipe 5 is used.

Further, an ignition guide opening 3 that can be opened and closed is provided at a lower position than the internal burner opening 2 of the burner body 12.

To explain the functions of the burner device for flame optical analysis of the present invention having the following configuration, atomizing gas Gb is introduced through the atomizing gas introduction pipe 9, and the sample solution 11 is atomized through the atomizer 7.

On the other hand, the fuel gas Gc is introduced through the fuel gas introduction pipe 1o and mixed therein, stored in the fog chamber main body 6, and ignited at the external burner opening 1.

At this time, a large flame called the external flame is lit above the external burner opening 1, but it is in an unstable state due to the disturbance of the outside air. As a result, a small flame called an internal flame is lit in the internal burner opening 2.

On the other hand, as the stabilizing gas Ga is gradually introduced through the stabilizing gas introduction pipe 4, the external flame in the external burner opening 1 becomes smaller and finally disappears, leaving only the internal flame in the internal burner opening 2.

Here, the ignition induction opening 6 is closed and the stabilizing gas introduction pipe 4 is closed.
By adjusting the stabilizing gas Ga from the internal burner opening 2, the internal flame of the internal burner opening 2 is extremely stabilized.

Note that various gases can be used as the stabilizing gas Ga'', but air can be used simply.

(5) Next, the vertical cross-sectional view in FIG. 2 shows a burner device for flame analysis according to another embodiment of the present invention, which has almost the same configuration and function as in FIG. Although the same parts are indicated by the same part numbers, in the embodiment shown in FIG. 2, the height of the entire burner device for flame analysis can be reduced by arranging the sample spray chamber 16 at almost right angles to the burner body 12. It is lowered.

Therefore, the sample spray chamber 13 is formed into a conical shape, a partition plate 15 is attached to the downstream side thereof, and a drain 8 for discharging the condensed liquid is provided below the partition plate 15.

In addition, a stabilizing gas introduction pipe 4 shown in the plan cross-sectional view of FIG. The fuel is uniformly introduced into the burner body 12 through the plurality of holes 16.

Therefore, if the flame analysis burner device of the present invention is applied,
A hydrogen flame can be ignited safely and stably.

(6) In general, hydrogen flames are extremely dangerous because hydrogen has a wide explosion limit.

Particularly in the burner device of the present invention, the process in which the external flame disappears and only the internal flame remains is a type of backfire, which is dangerous, but the present invention is equipped with an ignition guiding opening, which is a feature of this process. The internal burner opening can be ignited safely and reliably.

In addition, in the present invention, the sample and fuel are introduced without reducing the diameter of the central sample and fuel gas introduction pipe and internal burner opening, which increases sample introduction efficiency and reduces sensitivity during flame analysis. This is very advantageous in this respect.

In addition, the pressure pinch effect caused by the burner geometry and the difference in gas flow rate between the stabilizing gas and the central sample and fuel gases results in a dense internal flame and a high brightness excited emission.

In addition, in the case of the phosphorus sample, the PHO molecule emission due to the hydrogen reduction flame is obtained in an extremely constant state.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a main part of a burner device for flame light analysis in one embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of a main part of a burner device for flame light analysis in another embodiment of the present invention. and
FIG. 3 is a plan sectional view taken along the line AA in FIG. 2. DESCRIPTION OF SYMBOLS 1... External burner opening, 2... Internal burner opening, 6... Ignition induction opening, 4... Stabilizing gas introduction pipe, 6... Spray chamber main body, 11... Sample Solution, 12...
- Burner body, 14... Internal burner, Ga... Stabilizing gas, Gb... Spray gas, GC... Fuel gas.

Claims (1)

[Claims] A stabilizing gas introduction pipe for introducing stabilizing gas in an adjustable flow rate is connected to the lower part of the cylindrical nozzle body, which has an external burner opening at the upper part. A cylindrical internal burner is provided which extends through the burner body and has an internal burner opening in the burner body, and a lower part of the internal burner is opened into a spray chamber in which a sprayed sample solution can be mixed with a fuel gas and stored. A burner device for flame optical analysis, further comprising an ignition guide opening that can be opened and closed at a position below the internal burner opening of the burner body.