JP2003194722A - Method and apparatus for analysis of heavy metal substance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for an analysis wherein a heavy metal-based organic compound in groundwater or in soil can be quantitatively analyzed quickly and easily. <P>SOLUTION: The heavy metal substance analyzer 10 is constituted so as to be provided with chelate bodies 11 which adsorb and hold a heavy metal substance, a rotary table 12 which replaces the chelate bodies 11, a groundwater feed device 13 which circulates the groundwater 1 to the chelate bodies 11, a recovery device 14 which recovers the groundwater 1 circulated to the chelate bodies 11, a laser irradiation device 15 which irradiates a laser beam 100 at the chelate bodies 11, and a measuring device 16 which finds an amount of the heavy metal substance in the groundwater 1 on the basis of an intensity of light emitted from the chelate bodies 11 due to the irradiation of the laser beam 100. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an analysis method and apparatus for analyzing heavy metals such as lead, cadmium and chromium contained in groundwater and soil.

[0002]

2. Description of the Related Art Conventionally, when analyzing heavy metals such as lead, cadmium and chromium contained in groundwater,
After subjecting the sampled groundwater sample to various pretreatments such as removal of interfering substances, the sample was analyzed by emission spectroscopy or the like. When analyzing heavy metal substances contained in soil, the soil is put in an acidic aqueous solution, the heavy metal substances in the soil are extracted with an acid solution, and the various pretreatments are performed on the acid solution from which the soil has been removed. After the application, the acid solution was analyzed by emission spectroscopy or the like.

[0003]

However, when analyzing heavy metals in groundwater or soil in this way, the various pretreatments described above take time (about 2 days), and it takes a long time to obtain the analysis results. In addition to the above-mentioned problems, a large amount of processing waste liquid is generated, resulting in a difficulty in the subsequent processing.

In view of the above, an object of the present invention is to provide an analysis method and an apparatus therefor capable of quantitatively analyzing heavy metal organic compounds in groundwater and soil quickly and easily.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, a method for analyzing heavy metals according to the first aspect of the present invention is characterized in that a target liquid containing a heavy metal is passed through a chelate, After adsorbing and holding the heavy metal substance on the chelate, the chelate is irradiated with laser light or X-rays, and the target is determined based on the intensity of light emission from the chelate accompanying irradiation of laser light or X-rays. It is characterized in that the amount of the heavy metal substance in the liquid is determined.

The method for analyzing heavy metals according to the second aspect of the present invention is the method of analyzing the heavy metal according to the first aspect, wherein the chelate is loaded with a reference substance, and the intensity of light emitted from the reference substance upon irradiation with laser light or X-rays is increased. Based on the laser light or X
It is characterized in that the intensity of light emission from the heavy metal substance due to the irradiation of the line is corrected, and the amount of the heavy metal substance in the target liquid is obtained based on the corrected intensity.

A heavy metal analysis method according to the third invention is characterized in that, in the second invention, the reference substance is at least one of a rare earth element and a noble metal.

The heavy metal analysis method according to the fourth invention is the method according to any one of the first to third inventions,
The target liquid is an extract of soil or groundwater.

The heavy metal analyzer according to the fifth aspect of the present invention for solving the above-mentioned problems is an apparatus for analyzing heavy metal in a target liquid, which comprises a chelate body for adsorbing and holding the heavy metal. A target liquid supply means for circulating the target liquid through the chelate body, an irradiation means for irradiating the chelate body with laser light or X-rays, and an intensity of light emission from the chelate body accompanying irradiation with the laser light or X-rays. And a heavy metal amount measuring means for obtaining the amount of the heavy metal substance in the target liquid based on the above.

The heavy metal analyzer according to the sixth aspect of the invention is characterized in that, in the fifth aspect of the invention, a target liquid recovery means for recovering the target liquid flowing through the chelate is provided.

The heavy metal analyzer according to the seventh invention is characterized in that, in the fifth or sixth invention, it comprises a chelate exchange means for exchanging the chelate.

The heavy metal analyzer according to an eighth aspect of the present invention is the heavy metal analyzer according to the seventh aspect, wherein the chelate exchange means comprises a rotary table for holding a plurality of the chelate and moving the chelate. Is characterized by.

The heavy metal analyzer according to the ninth invention is the heavy metal analyzer according to any one of the fifth to eighth inventions,
The chelate supports a reference substance, and the heavy metal substance amount measuring means, based on the intensity of the light emission from the reference substance caused by the irradiation of the laser beam or the X-ray, the heavy metal substance caused by the irradiation of the laser beam or the X-ray. Is corrected, and the amount of the heavy metal substance in the target liquid is obtained based on the corrected intensity.

The heavy metal analyzer according to the tenth invention is characterized in that, in the ninth invention, the reference material is at least one of a rare earth element and a noble metal.

A heavy metal analyzer according to the tenth aspect of the invention is the heavy metal analyzer according to any one of the fifth to tenth aspects,
The target liquid is an extract of soil or groundwater.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a heavy metal substance analyzing method and an apparatus therefor according to the present invention will be described below with reference to the drawings, but the present invention is not limited to these embodiments.

[First Embodiment] The first embodiment of the heavy metal analysis method and apparatus according to the present invention will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of a heavy metal substance analyzer.

As shown in FIG. 1, a heavy metal substance analyzer 10 according to the present embodiment exchanges a chelate body 11 for exchanging the chelate body 11 with a chelate body 11 that adsorbs and holds a heavy metal substance such as lead, cadmium, or chromium. A rotary table 12 which is a means, a groundwater feeder 13 which is a target liquid supply means for circulating the groundwater 1 which is the target liquid in the chelate body 11, and a target liquid recovery means which collects the groundwater 1 which has flowed through the chelate body 11. A laser light 10 is applied to a certain collector 14 and the chelate body 11.
A laser irradiator 15 that is an irradiation unit that irradiates 0, and a measuring device that is a heavy metal amount measuring unit that determines the amount of heavy metal substances in the groundwater 1 based on the intensity of light emission from the chelate 11 accompanying the irradiation of the laser beam 100. It is equipped with 16.

The rotary table 12 is formed with a plurality of holding holes 12a at predetermined intervals along the circumferential direction so that the chelating bodies 11 can be held, and the chelating bodies 11 can be moved in the circumferential direction. It is rotatable.

The chelate 11 is inserted into each of the holding holes 12a of the rotary table 12, and the groundwater 1 is circulated while contacting it with a relatively large surface area like a filter or a column (mesh size). :
1 μm or less), and is shaped to be capable of adsorbing and holding heavy metal substances in groundwater 1. Examples of the chelate 11 include iminodiacetic acid chelate resin.

The groundwater feeder 13 can supply a predetermined amount (for example, 0.5 liter) of groundwater 1 to the chelate body 11 arranged at a predetermined position by the rotary table 12, and the groundwater 1 can be suspended. A filter 13a (mesh size: about 0.45 μm) is provided to remove turbid substances.

The collecting device 14 is disposed below the rotary table 12 and circulates through the chelating body 11 to hold the holding hole 1.
The groundwater 1 flowing out from the inside of 2a can be collected.

The laser irradiator 15 is an oscillator 15a that oscillates the laser light 100 (wavelength: 1064 nm) in a pulsed manner.
And an irradiation probe 1 for irradiating the chelate body 11 in which the groundwater 1 is distributed with the laser beam 100 from the oscillator 15a.
5b and.

The measuring device 16 includes a photodetector 16a for receiving the light emitted from the heavy metal material adsorbed and held by the chelate body 11 upon irradiation with the laser beam 100, and a target wavelength range from the light received by the photodetector 16a. In the groundwater 1 based on the intensity of the light measured by the detector 16c and the detector 16c that measures the intensity of the light dispersed by the spectrometer 16b. The data processor 16d for obtaining the amount of heavy metal material and the display 16e for displaying the calculation result by the data processor 16d.

A heavy metal analysis method using the heavy metal analysis apparatus 10 will be described below.

A predetermined amount (for example, 0.5 liters) of groundwater 1 is fed from the groundwater feeder 13 through the filter 13a, and the groundwater 1 from which suspended substances are removed is chelated in the holding hole 12a of the rotary table 12. By flowing through the body 11, the chelate body 11 adsorbs and holds the heavy metal substance contained in the groundwater 1 in a predetermined amount. In the groundwater 1 flowing through the chelate body 11, the heavy metal contained therein is the chelate body 11
Alkali metal such as sodium contained therein, alkaline earth metal such as calcium and magnesium contained, halogen such as chlorine, sulfoxide and the like pass through the chelate body 11 without being adsorbed to the chelate 11 and are recovered. 14 collected.

When a predetermined amount of groundwater 1 is circulated in the chelate body 11, the chelate body 11 in which the groundwater 1 is circulated is positioned below the irradiation probe 15b of the laser irradiator 15 and the light receiver 16a of the measuring device 16. On the turntable 1
Rotate 2.

Next, the oscillator 15a of the laser irradiator 15
Is activated to irradiate the laser beam 100 from the irradiation probe 15b toward the chelate body 11 in which the groundwater 1 is circulated, the heavy metal substance adsorbed and held by the chelate body 11 emits light, and the light receiver of the measuring device 16 16a receives the light, the spectroscope 16b selects only the light in the target wavelength region, the detector 16c measures the intensity of the light, the data processor 16d based on the intensity of the light, The amount (concentration) of the heavy metal substance in the groundwater 1 is calculated, and the display 16e displays the result. Thereby, the knowledge of the concentration of heavy metal substances in the groundwater 1 can be obtained.

That is, by circulating the groundwater 1 through the chelate body 11, the heavy metal substances in the groundwater 1 are adsorbed and held by the chelate body 11, and then the chelate body 11 is held.
Then, the amount of heavy metal substances in the groundwater 1 is calculated based on the intensity of the light emission from the chelate 11 associated with the irradiation of the laser beam 100.

Therefore, it is possible to immediately analyze the concentration of heavy metal substances in the groundwater 1 without performing a troublesome pretreatment on the groundwater 1.

Therefore, according to this embodiment, the heavy metal substances in the groundwater 1 can be quantitatively analyzed quickly and easily.

Further, the rotary table 12 is rotated so that the chelate body 11 through which the groundwater 1 is circulated by the groundwater feeder 13 is positioned below the irradiation probe 15b of the laser irradiation device 15 and the light receiver 16a of the measuring device 16. And a new chelate 1 in the other holding hole 12a of the turntable 12.
Since it becomes possible to circulate the groundwater 1 from the groundwater feeder 13 to 1, the laser beam 100 is irradiated from the laser irradiator 15 to the chelate body 11 in which a predetermined amount of the groundwater 1 is circulated, and at the same time, A predetermined amount of groundwater 1 can be circulated from the groundwater feeder 13 to the new chelate body 11.

Therefore, according to the present embodiment, the quantitative analysis of the heavy metal adsorbed and held by the plurality of chelate bodies 11 can be carried out efficiently and continuously, so that the continuous analysis efficiency can be improved.

[Second Embodiment] A second embodiment of the heavy metal analysis method and apparatus according to the present invention will be described with reference to FIG. FIG. 2 is a schematic configuration diagram of a heavy metal substance analyzer. However, for the same parts as in the case of the first embodiment described above, by using the same reference numerals as those used in the description of the first embodiment described above, Description that overlaps with the case of implementation is omitted.

As shown in FIG. 2, the heavy metal substance analyzer 20 according to the present embodiment comprises a chelate body 11 for adsorbing and holding a heavy metal substance, and a rotary table 12 as a chelate body exchange means for exchanging the chelate body 11. An extractor 23 which is a target liquid supply means for extracting a heavy metal substance in the soil 3 in a predetermined amount with the extract liquid 2 which is a target liquid and circulating it in the chelate body 11,
A collector 14 that is a target liquid collecting means that collects the extract 2 that has flowed through the chelate body 11, and a laser irradiator 15 that is an irradiation means that irradiates the chelate body 11 with the laser beam 100.
It is provided with a measuring device 16 which is a heavy metal substance amount measuring means for obtaining the amount of heavy metal substances in the soil 3 based on the intensity of light emission from the chelate body 11 accompanying the irradiation of the laser beam 100.

The extractor 23 sends a packed tower 23c filled with a predetermined amount (for example, 50 g) of the soil 3 and an extract 2 (for example, an aqueous acid solution such as nitric acid (1N)) into the packed tower 23c. A feeder 23b for feeding and a filter 23a (mesh size: about 0.45 μm) for removing suspended substances from the extract 2 that has passed through the soil 3 are provided.
The extract liquid 2 that has flowed from b to the inside of the packed tower 23c and the filter 23a can be supplied to the chelate body 11 arranged at a predetermined position by the rotary table 12.

In the heavy metal substance analyzer 20 having such an extractor 23, the packed tower 23c of the extractor 23 is filled with a predetermined amount (for example, 50 g) of the soil 3 and then the feeder 2 is used.
When the extraction liquid 2 is fed into the packed tower 23c from 3b, the extraction liquid 2 dissolves and extracts the heavy metal substances in the soil 3, and the filter 23
After the suspension is removed by a, it is supplied to the chelate 11 in the holding hole 12a of the rotary table 12, and the chelate 11 adsorbs and holds the heavy metal substance in the extract 2.

[0038] Hereinafter, the knowledge of the concentration of heavy metal substances in the soil 3 can be obtained by making it similar to the case of the first embodiment described above.

That is, in the heavy metal substance analyzer 10 of the first embodiment described above, the heavy metal substance in the groundwater 1 is quantitatively analyzed, but in the heavy metal substance analyzer 20 of the present embodiment, the soil is The heavy metal substances in 2 can be quantitatively analyzed.

Therefore, according to the present embodiment, it is possible to immediately analyze the concentration of heavy metal substances in the soil 2 without performing a troublesome pretreatment on the soil 2, so that the soil 2 Can be quantitatively analyzed quickly and easily.

In the present embodiment, depending on the relationship between the amount of soil 3 and the amount of extract liquid 2, the amount of extract liquid 2 remaining in the soil 3 in the packed tower 23c becomes relatively large,
The error in the quantitative analysis value may be too large.
In such a case, by supplying the extraction liquid 2 into the packed tower 23c and then supplying water, the extraction liquid 2 remaining in the soil 3 is sent out from the inside of the packed tower 23c together with the water to form a chelate. When it is sent to 11, the chelate body 11 can be made to adsorb and hold most of the heavy metal substances dissolved and extracted in the extraction liquid 2, and the error of the quantitative analysis value can be made very small.

[Third Embodiment] A heavy metal analysis method and apparatus according to the third embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a schematic configuration diagram of the heavy metal substance analyzer, and FIG. 4 is a graph showing the relationship between the concentration of the interfering substance and the detection intensities of the heavy metal substance and the control substance.
However, the same parts as those in the first and second embodiments described above are described by using the same reference numerals as those used in the description of the first and second embodiments described above. A duplicate description of the first and second implementations will be omitted.

As shown in FIG. 3, the heavy metal analysis apparatus 30 according to the present embodiment includes a chelate body 31 carrying a reference substance such as a rare earth element and a noble metal and adsorbing and holding a heavy metal matter, and a chelate body 31. The rotary table 12 as a chelate exchange means for exchanging, the groundwater feeder 13 as a target liquid supply means for circulating the groundwater 1 as the target liquid in the chelate body 31, and the groundwater 1 flowing through the chelate body 31 are collected. Based on the intensity of light emitted from the reference substance accompanying the irradiation of the laser beam 100, and the collector 14 that is the target liquid recovery unit, the laser irradiator 15 that is the irradiation unit that irradiates the chelate 31 with the laser beam 100, A heavy metal object that corrects the intensity of light emitted from the heavy metal object associated with the irradiation of the laser beam 100 and determines the amount of the heavy metal object in the groundwater 1 based on the corrected intensity. It includes a measuring device 36 is a measuring means.

The chelate body 31 is the same as in the first and second embodiments described above, in which a predetermined amount of a reference substance such as a rare earth element or a noble metal is carried.

The measuring device 36 receives the light emitted by the irradiation of the laser beam 100 from the reference substance carried on the chelate body 31 and the heavy metal material adsorbed and held by the chelate body 31, and a light receiving device 16a. A spectroscope 16b that transmits only light in a target wavelength range from the light received by the spectroscope 16a, a detector 16c that measures the intensity of the light that is spectroscopically dispersed by the spectroscope 16b, and the detector 16c.
A data processor for correcting the intensity of the light emission from the heavy metal substance based on the intensity of the light emission from the reference substance measured in step 1 and determining the amount of the heavy metal substance in the groundwater 1 based on the corrected intensity. 36d and a display 16e for displaying the calculation result of the data processor 36d.

Such a chelate body 31 and a measuring device 3
In the heavy metal analysis apparatus 30 including the groundwater feeder 6, as in the case of the first embodiment described above, the groundwater feeder 1
When a predetermined amount of ground water 1 is circulated from the chelate body 31 from 3 and the laser beam 100 is irradiated from the laser irradiator 15 toward the chelate body 31, the heavy metal substance adsorbed and held by the chelate body 31 and the chelate are collected. The reference substance carried on the body 31 emits light, the light receiver 16a of the measuring device 36 receives the light, the spectroscope 16b selects only the light in the target wavelength region, and the detector 16c detects the light. The intensity of light is measured, and the data processor 36d corrects the intensity of the light emission from the heavy metal object based on the intensity of the light emission from the reference substance, and based on the corrected intensity,
Calculate the amount (concentration) of heavy metal substances in groundwater 1 and display 1
6e displays the result.

As a result, in the heavy metal substance analyzer 30 of the present embodiment, it is possible to obtain accurate knowledge of the concentration of heavy metal substances in the groundwater 1. The reason for this will be described below.

For example, in the chelate body 31, Si, Ca, which emits strong light upon irradiation with the laser beam 100,
When a substance such as Fe or an interfering substance such as a volatile substance that absorbs light emitted from a heavy metal substance or the like accompanying the irradiation of the laser beam 100 is present, the interfering substance concentration is high as shown in FIG. As a matter of fact, the detection intensity of the light emitted from the heavy metal or the like by the detector 16c is reduced due to optical or chemical interference, which makes accurate quantitative analysis difficult.

Therefore, if a chelate body 31 that carries a reference substance that does not substantially exist in the groundwater 1 and that emits light in the same manner as a heavy metal substance upon irradiation with the laser beam 100 is used, as shown in FIG. The reference substance also emits light, and since the detection intensity of the emission by the detector 16c is proportional to the detection intensity of the emission from the heavy metal substance, it contains an element having a small Clark number such as a rare earth element or a noble metal. Based on the known concentration of the reference substance in the chelate body 31 carrying a predetermined amount of the reference substance, the decrease ratio of the detected intensity of the luminescence from the reference substance is calculated, and the heavy metal compound is calculated based on the calculated ratio. The detected intensity of the emitted light from is corrected, and the concentration of the heavy metal substance is calculated based on the corrected detected intensity.

Therefore, according to the present embodiment, even if the above-mentioned interfering substance exists in the groundwater 1, the concentration of heavy metal substances in the groundwater 1 can be accurately quantitatively analyzed. You can

In this embodiment, the case of quantitatively analyzing heavy metal substances in the groundwater 1, that is, the case based on the first embodiment has been described, but the heavy metal substances in the soil 1 are quantified. Even in the case of analysis, that is, in the case of being based on the second embodiment, it can be applied in the same manner as in the case of the present embodiment.

[Other Embodiments] Further, the above-mentioned first to
In the third embodiment, the chelate bodies 11 and 31 are irradiated with the laser beam 100, and the concentration of the heavy metal substance is obtained based on the intensity of light emitted from the chelate bodies 11 and 31 due to the irradiation of the laser beam 100. However, for example, it is possible to irradiate the chelate with X-rays and determine the concentration of the heavy metal substance based on the intensity of light emission from the chelate associated with the X-ray irradiation. In this case, instead of the laser irradiator 15 and the measuring instruments 16 and 36,
An X-ray irradiator, which is an irradiation unit that irradiates the chelate with X-rays, and a measuring device, which is a heavy metal amount measuring unit that determines the concentration of the heavy metal based on the intensity of light emission from the chelate accompanying the X-ray irradiation. Be prepared.

[0053]

The method for analyzing heavy metals according to the first aspect of the present invention is characterized in that a target liquid containing a heavy metal is passed through a chelate to cause the chelate to adsorb and hold the heavy metal in the target liquid. Irradiating the chelate with laser light or X-rays, and determining the amount of the heavy metal substance in the target liquid based on the intensity of light emission from the chelate accompanying irradiation of laser light or X-rays, Since the concentration of heavy metal substances in the target liquid can be immediately analyzed without performing a troublesome pretreatment on the target liquid, it is possible to quickly and easily perform the quantitative analysis of the heavy metal substances in the target liquid. it can.

The method for analyzing heavy metals according to the second aspect of the present invention is the method of analyzing the heavy metal according to the first aspect, wherein a reference substance is carried on the chelate and the intensity of the emission from the reference substance upon irradiation with laser light or X-rays is increased. Based on the laser light or X
The intensity of the light emission from the heavy metal substance accompanying the irradiation of the line is corrected, and the amount of the heavy metal substance in the target liquid is calculated based on the corrected intensity, so that an interference substance may be present in the target liquid. Even in such a case, the concentration of the heavy metal substance in the target liquid can be accurately quantitatively analyzed.

The method for analyzing heavy metals according to the third aspect of the present invention is the method for analyzing heavy metals according to the second aspect, wherein the reference substance is at least one of a rare earth element and a noble metal. It can be quantitatively analyzed.

The method for analyzing heavy metals according to the fourth invention is the method according to any one of the first to third inventions, wherein
Since the target liquid is a soil extract or groundwater,
Soil and groundwater contaminated with heavy metals can be quickly analyzed on-site, making it easy to reflect in real-time purification treatment measures on-site.

A heavy metal substance analyzer according to the fifth aspect of the invention is a device for analyzing a heavy metal substance in a target liquid, wherein the chelate body adsorbs and holds the heavy metal substance, and the target liquid is circulated through the chelate body. Target liquid supply means, irradiation means for irradiating the chelate with laser light or X-rays, and the heavy metal substance in the target liquid based on the intensity of light emission from the chelate accompanying irradiation of laser light or X-rays. Since it is provided with a heavy metal amount measuring means for determining the amount of, it is possible to immediately analyze the concentration of heavy metal in the target liquid without performing a troublesome pretreatment for the target liquid, A heavy metal substance in the target liquid can be quantitatively analyzed quickly and easily.

The heavy metal analyzer according to the sixth aspect of the present invention is the fifth aspect of the present invention, which is provided with a target liquid recovery means for recovering the target liquid flowing through the chelate body.
The target liquid can be reliably collected without leaking to the outside.

The heavy metal analyzer according to the seventh aspect of the invention is the heavy metal substance analyzer according to the fifth or sixth aspect of the invention, which comprises a chelate exchange means for exchanging the chelate, so that it is adsorbed and held by a plurality of chelate bodies. It is possible to efficiently and continuously perform quantitative analysis of existing heavy metal substances, and to improve continuous analysis efficiency.

In the heavy metal analyzer according to the eighth aspect of the invention, in the seventh aspect, the chelate exchange means includes a rotary table for holding a plurality of the chelate and moving the chelate. The quantitative analysis of heavy metal substances adsorbed and held by a plurality of chelates can be easily carried out efficiently and continuously, and the continuous analysis efficiency can be easily improved.

A heavy metal analyzer according to the ninth invention is the heavy metal analyzer according to any one of the fifth to eighth inventions,
The chelate supports a reference substance, and the heavy metal substance amount measuring means, based on the intensity of the light emission from the reference substance caused by the irradiation of the laser beam or the X-ray, the heavy metal substance caused by the irradiation of the laser beam or the X-ray. Since the amount of the heavy metal substance in the target liquid is determined based on the corrected intensity, the intensity of light emitted from is corrected even if an interfering substance is present in the target liquid. The concentration of heavy metal substances in the target liquid can be accurately quantitatively analyzed.

The heavy metal analyzer according to the tenth invention is the heavy metal analyzer according to the ninth invention, wherein the reference substance is at least one of a rare earth element and a noble metal, so that the concentration of the heavy metal in the target liquid can be more accurately measured. It can be quantitatively analyzed.

A heavy metal analyzer according to the tenth invention is the heavy metal analyzer according to any one of the fifth to tenth inventions,
Since the target liquid is a soil extract or groundwater,
Soil and groundwater contaminated with heavy metals can be quickly analyzed on-site, making it easy to reflect in real-time purification treatment measures on-site.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a first embodiment of a heavy metal analyzer according to the present invention.

FIG. 2 is a schematic configuration diagram of a second embodiment of a heavy metal substance analyzer according to the present invention.

FIG. 3 is a schematic configuration diagram of a third embodiment of a heavy metal substance analyzer according to the present invention.

FIG. 4 is a graph showing the relationship between the concentration of interfering substances and the detection intensities of heavy metal substances and control substances.

[Explanation of symbols]

1 groundwater 2 extract 3 soil 10 Heavy metal analyzer 11 Chelate 12 rotating table 12a holding hole 13 Groundwater feeder 13a filter 14 collector 15 Laser irradiator 15a oscillator 15b irradiation probe 16 measuring instruments 16a light receiver 16b spectroscope 16c detector 16d data processor 16e Display 20 Heavy metal analyzer 23 Extractor 23a filter 23b feeder 23c packed tower 30 Heavy metal analyzer 31 chelate 36 Measuring instrument 36d data processor 100 laser light

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G01N 33/24 G01N 33/24 B 35/04 35/04 A (72) Inventor Ryuichi Matsubara Takasago City, Hyogo Prefecture 2-1-1 Niihama, Arai-cho, Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Inventor Makio Atsumi 2-chome, Niihama 2-chome, Niihama, Arai-cho, Takasago-shi, Hyogo Takahishi Engineering Co., Ltd. 2G042 AA01 BC06 BC11 BC13 CA02 CB03 DA06 EA02 FA06 FB04 HA07 2G043 AA01 BA01 CA03 DA02 DA05 EA01 GA07 GB19 GB21 LA01 2G052 AA06 AA19 AB01 AD26 AD32 AD52 EA03 ED07 FB02 GA14 GA19 JA04 JA07 JA09 JA23 2G058 AA03 CC01 BA05 CC01 FA01 CC02

Claims (11)

[Claims] 1. A target liquid containing a heavy metal substance is circulated through a chelate to adsorb and hold the heavy metal substance in the target liquid on the chelate, and then the chelate is irradiated with laser light or X-rays. Then, the heavy metal analysis method is characterized in that the amount of the heavy metal in the target liquid is determined based on the intensity of the light emission from the chelate upon irradiation with laser light or X-rays. 2. The chelating substance according to claim 1, wherein a reference substance is carried on the chelate, and the chelating substance is irradiated with laser light or X-rays based on the intensity of light emitted from the reference substance with irradiation of laser light or X-rays. A method for analyzing heavy metal, comprising correcting the intensity of light emitted from the heavy metal and determining the amount of the heavy metal in the target liquid based on the corrected intensity. 3. The method for analyzing heavy metals according to claim 2, wherein the reference substance is at least one of a rare earth element and a noble metal. 4. The heavy metal analysis method according to claim 1, wherein the target liquid is an extract of soil or groundwater. 5. An apparatus for analyzing a heavy metal substance in a target liquid, comprising: a chelate that adsorbs and holds the heavy metal; a target liquid supply unit that circulates the target liquid through the chelate; An irradiation means for irradiating laser light or X-rays, and a heavy metal amount measuring means for determining the amount of the heavy metal substances in the target liquid based on the intensity of light emission from the chelate body accompanying the irradiation of laser light or X-rays. A heavy metal analyzer, characterized by being provided. 6. The heavy metal substance analyzer according to claim 5, further comprising a target liquid recovery means for recovering the target liquid having passed through the chelate. 7. The heavy metal analyzer according to claim 5 or 6, further comprising chelate exchange means for exchanging the chelate. 8. The heavy metal analyzer according to claim 7, wherein the chelate exchange means includes a rotary table that holds a plurality of the chelate and moves the chelate. 9. The chelate according to any one of claims 5 to 8, wherein the chelate supports a reference substance, and the heavy metal amount measuring means emits light from the reference substance accompanying irradiation of laser light or X-rays. Intensity of light emission from the heavy metal object accompanying irradiation of laser light or X-rays is corrected based on the intensity, and the amount of the heavy metal object in the target liquid is determined based on the corrected intensity. Heavy metal analyzer. 10. The heavy metal analyzer according to claim 9, wherein the reference substance is at least one of a rare earth element and a noble metal. 11. The heavy metal analyzer according to any one of claims 5 to 10, wherein the target liquid is a soil extract or groundwater.