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Plasma spectrometry method and suppressor of plasmon luminescence from non-target materials

A technology of plasma and analysis method, which is applied in the field of plasma spectroscopic analysis, and can solve problems such as inability to analyze targets and inaccurate capture

Active Publication Date: 2022-05-10
ARKRAY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when the sample is subjected to the above-mentioned analysis, in addition to the peak waveform of the plasma originating from the target, peak waveforms of other plasmas not originating from the target may be generated.
Therefore, for example, there is a problem that the peak waveform of the plasma from the target cannot be accurately captured and the target cannot be accurately analyzed because other peak waveforms overlap with the peak waveform of the plasma from the target.

Method used

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  • Plasma spectrometry method and suppressor of plasmon luminescence from non-target materials
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  • Plasma spectrometry method and suppressor of plasmon luminescence from non-target materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] It was confirmed that plasmon emission from non-target materials in the sample was suppressed by the coexistence of the antifoaming agent.

[0104] (1) Plasma spectroscopic analysis device

[0105] As a plasma spectrometer, a bottomed cylindrical transparent PMMA container (height 15mm x diameter ). Quartz glass was arranged at the center of the bottom of the container. The electrode 1 and the electrode 2 are arranged in the above container. The electrodes 1 are arranged in a direction perpendicular to the bottom surface of the container. In addition, one end of the electrode 1 is arranged so as to be in contact with the quartz glass at the bottom of the container. Electrode 1 uses a brass rod with a diameter of 0.12 mm. The electrode 1 was exposed from the tip to 0.3 mm, and the other regions were insulated. The electrode 2 is in a vertical direction with respect to the electrode 1, and is arranged toward the inside from the side surface of the above-mentioned c...

Embodiment 2

[0133] It was confirmed that plasma emission from non-target materials in the sample was suppressed by changing the concentration of the antifoaming agent.

[0134] (1) Analysis of mercury

[0135] For the urine sample collected from the subject, ethanol was added to the final concentration of 0% by volume, 5% by volume or 12.5% ​​by volume. Analysis of Mercury.

[0136] show these results in Figure 4 . Figure 4 It is a graph showing spectra around peaks of luminescence derived from mercury in urine samples with different ethanol concentrations. exist Figure 4 In , the horizontal axis represents the wavelength, and the vertical axis represents the emission intensity (count value). Such as Figure 4 As shown, in the sample to which ethanol was not added (0 volume %), a peak was confirmed at a wavelength (near 253 nm) peculiar to mercury, but a peak from a non-target material was also confirmed at other wavelengths (near 252 nm). peak. In contrast, in the sample to wh...

Embodiment 3

[0142] Using various antifoaming agents, it was confirmed that plasma emission from non-target materials in the samples was suppressed.

[0143] For the urine sample collected from the subject, ethanol, methanol, butanol, isopropanol, acetone, SNDefoamer777 (SAN NOPCO) or Triton (trademark) X-100 were used as antifoaming agents at a final concentration of 5 vol. %, except that the antifoaming agent was added or not added (0 volume %), the analysis of mercury and lead in the urine sample was carried out in the same manner as in Example 1 (2). A urine sample to which no antifoaming agent was added was used as a sample of a comparative example.

[0144] show the result in Figure 6 . Figure 6 (A) is a graph showing the spectrum near the peak of luminescence originating from mercury in urine samples to which different antifoaming agents were added, Figure 6 (B) is a graph showing the spectra around the peak of the lead-derived luminescence in urine samples to which different ...

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Abstract

The present invention relates to plasma spectroscopic analysis methods and suppressors of plasma luminescence from non-target materials. The plasma spectroscopic analysis method is characterized in that it includes the following steps: a concentrating step, in the presence of the sample, concentrating the target material in the sample in the vicinity of one of the pair of electrodes; a plasma generating step, By applying a voltage to the above-mentioned pair of electrodes, plasma is generated in the above-mentioned sample; and the detection step is to detect the luminescence of the above-mentioned target material generated under the action of the above-mentioned plasma, and the above-mentioned plasma generation step is performed in the antifoaming agent. in presence.

Description

technical field [0001] The present invention relates to plasma spectroscopic methods and suppressors of plasma luminescence from non-target materials. Background technique [0002] As a trace metal element analysis method, a method is known in which a voltage is applied to a sample containing a metal as a target, plasma is generated, and plasma luminescence thereof is detected (see, for example, International Publication No. 2012 / 120919 ). [0003] However, when the sample is subjected to the above analysis, in addition to the peak waveform of plasma originating from the target, peak waveforms of other plasmas not originating from the target may be generated. Therefore, there is a problem that, for example, the peak waveform of the plasma from the target cannot be accurately captured because another peak waveform overlaps with the peak waveform of the plasma from the target, and the target cannot be analyzed accurately. Contents of the invention [0004] The problem to b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/69
CPCG01N21/69
Inventor 笠井督夫
Owner ARKRAY INC