JPH0726691Y2 - Plasma emission spectroscopy analyzer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a plasma emission spectroscopic analyzer suitable for analyzing a plurality of solvent samples.

(B) Prior art The ICP light source section of a high-frequency inductively coupled plasma (ICP) emission spectroscopic analyzer, which is a type of plasma emission spectroscopic analyzer, has the structure shown in FIG. 1 is a plasma torch, 2 is a high frequency induction coil, 3 is a plasma torch, 4 is a coolant gas introduction pipe, 5 is a plasma gas introduction pipe, 6 is a carrier gas introduction pipe, 7
Is nebulizer, 8 is spray chamber (chamber), 9 is drain, 10
Is a sample container, and 11 is a solvent supply capillary.

The sample 10 is sucked by the nebulizer 7 via the capillary 11, and sent to the plasma torch 1 via the spray chamber 8. Generally, plasma has a structure that cannot be maintained unless a solvent is constantly supplied. Therefore, the capillary 11 must always supply the sample or the solvent.

FIG. 3 shows the structure of a conventional autosampler. The sample prepared in the sample container 10 arranged on the sample container table 12 is sent to the nebulizer 7 via the capillary 11. Further, during non-analysis, the capillary supplies the solvent supplied from the pump 14 to the solvent storage tank 13 to the plasma. I c
Due to the structure of P, the capillary must always supply the sample or solvent. FIG. 4 shows an observation of this autosampler from above the device.

The chamber switching device is used to automatically analyze multiple solvent samples (Fig.
No. 103356). This system uses two systems of capillaries 11, 11 'and a nebulizer to automatically analyze multiple solvent samples.
It has 7,7 'and spray chambers 8,8'. By selecting the carrier gas to be supplied to the nebulizer and switching the switching unit 15 according to an instruction from the outside, it is possible to automatically analyze a plurality of solvent samples.

(C) Problems to be solved by the invention When using a combination of an autosampler and a chamber switching device In the autosampler, the solvent to be supplied to the solvent storage tank must be selected and switched at the same time when the capillary of the chamber switching device is selected. . With this conventional technique, it is impossible to automatically select a solvent, which poses a problem when performing automatic analysis.

The present invention uses an autosampler and a chamber switching device to enable automatic analysis of multiple solvent samples with an ICP emission spectroscopy analyzer.

(D) Means for Solving the Problems The present invention is a plasma emission spectroscopic analyzer including an autosampler, in which a plurality of systems of nebulizers to which a sample from the autosampler is supplied are connected to a plasma torch via a switching valve. In, while connecting a plurality of systems of solvent supply capillaries corresponding to each nebulizer, a solvent storage tank of the solvent to be supplied to each capillary and a pump for replenishing the solvent to the solvent storage tank are provided in a plurality of systems corresponding to the capillaries. It is characterized by being provided.

(E) Embodiment An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention. The same parts as those described above are designated by the same reference numerals. 11, 11 'is a capillary for solvent supply corresponding to the nebulizer 7, 7', 13, 13 'is a capillary 11, 11'
It is a solvent storage tank provided corresponding to. 13, 13 'have partition walls and can store multiple solvents. The solvent storage tanks 13 and 13 'have a structure capable of automatically supplying a solvent by a plurality of pumps 14 and 14'.

It is necessary to always supply the same solvent as the sample to the plasma. The present invention has a plurality of solvent storage tanks for supplying a plurality of solvents, and in conjunction with the chamber switching device selecting a sample supply system according to an instruction from the outside, the solvent supply corresponding to that chamber is performed. The pumps 14 or 14 'for the above are operated so that the respective solvent is always filled in the solvent storage tank 13 or 13'.

(F) Effects Since the present invention has made it possible to automatically supply a plurality of solvents, by combining the present invention with a chamber switching device, a large number of samples can be sampled using an autosampler in a plasma emission spectrophotometer. In the case of continuous analysis, it has become possible to automatically switch and analyze multiple types of samples that require multiple solvents.

[Brief description of drawings]

FIG. 1 shows the configuration of the autosampler according to the present invention. Figure 2 shows the structure of the ICP light source.
FIG. 3 shows the prior art of an autosampler.
FIG. 4 shows the autosampler shown in FIG. 2 observed from above the device. FIG. 5 shows the configuration of the chamber switching device.

Claims (1)

[Scope of utility model registration request] 1. A plasma emission spectroscopic analyzer in which an autosampler is provided, and a plurality of systems of nebulizers to which a sample from the autosampler is supplied are connected to a plasma torch through a switching valve, and a plurality of systems are provided corresponding to each nebulizer. The plasma emission spectroscopy is characterized in that the solvent supply capillaries are connected to each other, and a plurality of solvent storage tanks for the solvent to be supplied to the respective capillaries and a plurality of pumps for supplying the solvent to the solvent storage tanks are provided corresponding to the capillaries. Analysis equipment.