CN101021515B - Method for in-situ sampling, separating enriching and measuring heavy metal ion in water body - Google Patents
Method for in-situ sampling, separating enriching and measuring heavy metal ion in water body Download PDFInfo
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- CN101021515B CN101021515B CN2007100105535A CN200710010553A CN101021515B CN 101021515 B CN101021515 B CN 101021515B CN 2007100105535 A CN2007100105535 A CN 2007100105535A CN 200710010553 A CN200710010553 A CN 200710010553A CN 101021515 B CN101021515 B CN 101021515B
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Abstract
A method to sample in situ, separate, enrich and measure heavy metal ion in waters. Its steps contain: (1) Puts some high-molecular compound being capable of occurring chemical reaction with heavy metal ion into device and uses a semi-permeable membrane being able to permeate heavy metal ion to cover it. (2) Puts device into waters and detaches it from waters by membrane. (3) Sets in waters for a period of time. Recur to osmosis of membrane, heavy metal ion enters into back of device to occur chemical reaction with high-molecular compound. (4) Takes out device located in waters to measure concentration and mean concentration of heavy metal in waters by atomic absorption spectrometry. It is characterized in that simple, economical, providing concentration and measurement in situ for much heavy metal, has selectivity.
Description
Technical field
The present invention relates to chemistry and environmental monitoring technology field, particularly a kind of in water body the method for in-situ sampling, separation, enrichment, measurement heavy metal ion.
Background technology
Inorganic pollutant in the environment is more outstanding with heavy metal, mainly is because heavy metal can not be decomposed and be easy to the accumulation conversion by microorganism.That have in addition can lead to food chain in human body with harmful concentration accumulation.In the environment heavy metal pollution mainly contain mercury, cadmium, lead, copper, chromium, arsenic, nickel, iron (though arsenic does not belong to heavy metal, because of its source, harm all similar to heavy metal, so list the discussion of heavy metal ranks usually in).The reliable measurements of trace metal ion is significant for the research of polluting and trace element reclaims in the natural water.But low owing to environmental sample measured object concentration, component is complicated, chaff interference is many, identity element with polynary form exist, easy affected by environment the variation, detection method all will be through just carrying out assay determination after the complicated pre-treatment usually.Classical pre-treating method not only will lean on manually-operated, and working strength is big, and long processing period needs a large amount of organic solvents, and poor reproducibility, for analytical work has brought very big error.Therefore the Research on New that reduces the pre-treatment process all has great importance to Environmental Analytical Chemistry and even analytical chemistry.
Summary of the invention
At the problem that prior art exists, the invention provides a kind of in water body the method for in-situ sampling, separation, enrichment, measurement heavy metal ion.
The method of the present invention in-situ sampling, enrichment and quantitative measurment heavy metal ion in aqueous solution is mainly utilized the chemical reaction of the characteristic group on monitored material in characteristic group on the macromolecular compound and the extraneous aqueous solution or the monitored material, reaches the purpose of in-situ sampling, enrichment and quantitative measurment.
The inventive method comprises:
(1) gets and a certain amount ofly can put into device, device is sealed with the semi-permeable diaphragm that can see through heavy metal ion with the macromolecular compound of heavy metal ion generation chemical reaction;
(2) the above-mentioned device that contains macromolecular compound is put into the water body that contains heavy metal ion, the macromolecular compound in the device is separated with the water body tunicle;
(3) in water body, place a period of time, utilize the osmosis of film, after the heavy metal ion in the water body enters into the device inside of tunicle isolation, with macromolecular compound generation chemical reaction;
(4) take out the device that is placed in the water body, use the concentration of aas determination heavy metal, and calculate the mean concentration of heavy metal in interior water body standing time.
Can be carboxymethyl cellulose, CMC, sodium polyacrylate with the macromolecular compound of heavy metal ion reaction among the present invention.
Aqueous solution comprises described in the method for the present invention: the water in natural fresh water, natural mineralized water, sewage, potable water, recycle-water, the biosome in water, sediment and the soil.
The used device of the inventive method is the device of a kind of in-situ sampling, separation, enrichment, measurement, and as shown in drawings: this device is that macromolecular compound is housed in container, with semi-permeable diaphragm it is sealed then, and is fixed by rubber gasket and binding clasp and gets final product.
Material in the solution can be represented by a simple equation:
M+nL→M(L)
n
M: monitored material; L: in conjunction with phase (excessive); M (L)
n: the complex compound that monitored material and macromolecular compound form.
In the present invention, macromolecular diffusion may be influenced by semi-permeable diaphragm.But simple metallic ion or micromolecule organic compound then can freely spread, and produce an effective coefficient of diffusion.This and they diffusion in water is as broad as long.Therefore the present invention allows molecular volume freely to spread less than the solable matter in semi-permeable diaphragm duct.
In the inventive method, the semi-permeable diaphragm that can permeate monitored material has dialysis membrane, chromatographic paper, dialysis membrane, biological membrane, collodion film, viscose paper, parchment, animal's bladder film etc.The semi-permeable diaphragm that can see through heavy metal ion is all kinds semi-permeable diaphragm or selective permeation film, and it allows to see through molecular weight more than or equal to 2000.
In the inventive method, contain the macromolecule that can combine with monitored material in the film inboard: its mean molecular weight should be greater than 3000, and its concentration of aqueous solution is 0.0001-1.0molL
-1If the semi-permeable diaphragm hole is little, then used high molecular mean molecular weight can be littler, if the semi-permeable diaphragm hole is big, then used high molecular mean molecular weight should be more greatly, total principle can only allow monitored material freedom to spread by semi-permeable diaphragm, and can not make the macromolecule of film inboard be penetrated into extraneous aqueous phase.The time of putting into water body is 1 hour～1 year.Medium-term and long-term placement of water body that a monitored material concentration constantly changes, can obtain at this moment between the mean concentration (C of monitored material in the system in (t) scope
m), C
m=C
Sample/ t, C in the formula
SampleFor measuring concentration.
Monitored heavy metal ion in the inventive method, for example: Cu, Cd, Co, Zn, Pb, Ni, Cr, Fe, U, Mn, Ag, Hg, Be, Tl, Tu, Re, V, Ti.
In the inventive method, the characteristics of used macromolecular compound be they can both with monitored material generation chemical reaction, and firmly combine with monitored material, make that the concentration of free monitored material remains zero in the Polymer Solution of film inboard.
The major advantage of this method has:
(1) simple, economy.
(2) can provide former site concentration.
(3) can measure multiple material.
(4) has selectivity.Be not to measure all materials in the nature water, can only measure those can be by the material of enrichment in combination mutually.
(5) quantitative measurment is with relevant in conjunction with the characteristic of the dynamics of monitored material of picked-up mutually and semi-permeable diaphragm.
(6) if a suitable semi-permeable diaphragm thickness is chosen, the transmission of material is only relevant with molecular diffusion, and transmission course of material and fluid dynamics are irrelevant.
Description of drawings
Accompanying drawing is in-situ sampling, separation, enrichment, measurement mechanism structural representation in the water body of the present invention.
Among the figure: 1 polytetrafluoroethylcontainer container, 2 macromolecular compound aqueous solution, 3 semi-permeable diaphragms, 4 pads, 5 binding clasps
Embodiment
Embodiment 1
After getting 2mL0.0001M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with dialysis membrane device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 1h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
After getting 2mL0.0001M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with chromatographic paper device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 1h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
After getting 2mL 0.0001M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with the collodion film device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 1h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 4
After getting 2mL0.01M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with dialysis membrane device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
After getting 2mL0.01M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with chromatographic paper device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 6
After getting 2mL 0.01M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with the collodion film device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 7
After getting 2mL 0.02M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with dialysis membrane device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 8
After getting 2mL 0.02M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with chromatographic paper device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 9
After getting 2mL 0.02M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with the collodion film device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 10
After getting 2mL 0.0001M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with dialysis membrane device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 1h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 11
After getting 2mL 0.0001M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with chromatographic paper device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 1h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 12
After getting 2mL 0.0001M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with the collodion film device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 1h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 13
After getting 2mL 0.01M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with dialysis membrane device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 14
After getting 2mL 0.01M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with chromatographic paper device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 15
After getting 2mL 0.01M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with the collodion film device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 16
After getting 2mL 0.02M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with dialysis membrane device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 17
After getting 2mL 0.02M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with chromatographic paper device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 18
After getting 2mL 0.02M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with the collodion film device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 19
After getting 2mL0.0001M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with dialysis membrane device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 1h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 20
After getting 2mL0.0001M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with chromatographic paper device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 1h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 21
After getting 2mL 0.0001M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with the collodion film device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 1h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 22
After getting 2mL 0.01M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with dialysis membrane device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 23
After getting 2mL 0.01M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with chromatographic paper device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 24
After getting 2mL 0.01M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with the collodion film device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 25
After getting 2mL 0.02M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with dialysis membrane device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 26
After getting 2mL 0.02M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with chromatographic paper device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 27
After getting 2mL0.02M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with the collodion film device is sealed, totally 3, device is put into the water body of heavy metal pollution and placed the 12h taking-up, utilize the concentration of aas determination heavy metal, and calculate in standing time the mean concentration of heavy metal in the water body.
Embodiment 28
After getting 2mL0.02M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with dialysis membrane device is sealed, totally 21, device is put into natural water or heavy metal-polluted water, placed for 1 week, take out 3 every day, utilize metallic ion in the aas determination water body, and calculate the mean concentration of metallic ion in the standing time internal water system.
Embodiment 29
After getting 2mL0.02M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with chromatographic paper device is sealed, totally 21, device is put into natural water or heavy metal-polluted water, placed for 1 week, take out 3 every day, utilize metallic ion in the aas determination water body, and calculate the mean concentration of metallic ion in the standing time internal water system.
Embodiment 30
After getting 2mL 0.02M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with the collodion film device is sealed, totally 21, device is put into natural water or heavy metal-polluted water, placed for 1 week, take out 3 every day, utilize metallic ion in the aas determination water body, and calculate the mean concentration of metallic ion in the standing time internal water system.
Embodiment 31
After getting 2mL0.02M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with dialysis membrane device is sealed, totally 21, device is put into natural water or heavy metal-polluted water, placed for 1 week, take out 3 every day, utilize metallic ion in the aas determination water body, and calculate the mean concentration of metallic ion in the standing time internal water system.
Embodiment 32
After getting 2mL0.02M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with chromatographic paper device is sealed, totally 21, device is put into natural water or heavy metal-polluted water, placed for 1 week, take out 3 every day, utilize metallic ion in the aas determination water body, and calculate the mean concentration of metallic ion in the standing time internal water system.
Embodiment 33
After getting 2mL 0.02M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with the collodion film device is sealed, totally 21, device is put into natural water or heavy metal-polluted water, placed for 1 week, take out 3 every day, utilize metallic ion in the aas determination water body, and calculate the mean concentration of metallic ion in the standing time internal water system.
Embodiment 34
After getting 2mL0.02M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with dialysis membrane device is sealed, totally 21, device is put into natural water or heavy metal-polluted water, placed for 1 week, take out 3 every day, utilize metallic ion in the aas determination water body, and calculate the mean concentration of metallic ion in the standing time internal water system.
Embodiment 35
After getting 2mL 0.02M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with chromatographic paper device is sealed, totally 21, device is put into natural water or heavy metal-polluted water, placed for 1 week, take out 3 every day, utilize metallic ion in the aas determination water body, and calculate the mean concentration of metallic ion in the standing time internal water system.
Embodiment 36
After getting 2mL0.02M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with the collodion film device is sealed, totally 21, device is put into natural water or heavy metal-polluted water, placed for 1 week, take out 3 every day, utilize metallic ion in the aas determination water body, and calculate the mean concentration of metallic ion in the standing time internal water system.
Embodiment 37
After getting 2mL 0.05M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with dialysis membrane device is sealed, totally 36, device is put into natural stream networks, placed 1 year, take out 3 every month, utilize metallic ion in the aas determination natural stream networks, and calculate the mean concentration of metallic ion in the standing time internal water system and can understand the relation in concentration of metal ions and season and concentration of metal ions in the situation of change of the whole year.
Embodiment 38
After getting 2mL 0.05M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with chromatographic paper device is sealed, totally 36, device is put into monitored water system, placed 1 year, take out 3 every month, utilize metallic ion in the aas determination natural stream networks, and calculate the mean concentration of metallic ion in the standing time internal water system and can understand the relation in concentration of metal ions and season and concentration of metal ions in the situation of change of the whole year.
Embodiment 39
After getting 2mL 0.05M carboxymethyl cellulose (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with the collodion film device is sealed, totally 36, device is put into monitored water system, placed 1 year, take out 3 every month, utilize metallic ion in the aas determination natural stream networks, and calculate the mean concentration of metallic ion in the standing time internal water system and can understand the relation in concentration of metal ions and season and concentration of metal ions in the situation of change of the whole year.
Embodiment 40
After getting 2mL 0.05M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with dialysis membrane device is sealed, totally 36, device is put into natural stream networks, placed 1 year, take out 3 every month, utilize metallic ion in the aas determination natural stream networks, and calculate the mean concentration of metallic ion in the standing time internal water system and can understand the relation in concentration of metal ions and season and concentration of metal ions in the situation of change of the whole year.
Embodiment 41
After getting 2mL 0.05M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with chromatographic paper device is sealed, totally 36, device is put into monitored water system, placed 1 year, take out 3 every month, utilize metallic ion in the aas determination natural stream networks, and calculate the mean concentration of metallic ion in the standing time internal water system and can understand the relation in concentration of metal ions and season and concentration of metal ions in the situation of change of the whole year.
Embodiment 42
After getting 2mL 0.05M sodium polyacrylate (calculating) volume of packing into and being the polyacrylic device of 2mL by monomer concentration, with the collodion film device is sealed, totally 36, device is put into monitored water system, placed 1 year, take out 3 every month, utilize metallic ion in the aas determination natural stream networks, and calculate the mean concentration of metallic ion in the standing time internal water system and can understand the relation in concentration of metal ions and season and concentration of metal ions in the situation of change of the whole year.
Embodiment 43
After getting 2mL0.05M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with dialysis membrane device is sealed, totally 36, device is put into monitored water system, placed 1 year, take out 3 every month, utilize metallic ion in the aas determination natural stream networks, and calculate the mean concentration of metallic ion in the standing time internal water system and can understand the relation in concentration of metal ions and season and concentration of metal ions in the situation of change of the whole year.
Embodiment 44
After getting 2mL 0.05M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with chromatographic paper device is sealed, totally 36, device is put into natural stream networks, placed 1 year, take out 3 every month, utilize metallic ion in the monitored water system of aas determination, and calculate the mean concentration of metallic ion in the standing time internal water system and can understand the relation in concentration of metal ions and season and concentration of metal ions in the situation of change of the whole year.
Embodiment 45
After getting 2mL 0.05M CMC (calculating) volume of packing into and being the polyacrylic device of 2mL by carboxyl concentration, with the collodion film device is sealed, totally 36, device is put into natural stream networks, placed 1 year, take out 3 every month, utilize metallic ion in the monitored water system of aas determination, and calculate the mean concentration of metallic ion in the standing time internal water system and can understand the relation in concentration of metal ions and season and concentration of metal ions in the situation of change of the whole year.
Claims (3)
1. the method for an in-situ sampling in water body, separation, enrichment, measurement heavy metal ion is characterized in that may further comprise the steps:
(1) gets and a certain amount ofly can put into device with the macromolecular compound of heavy metal ion generation chemical reaction, with the semi-permeable diaphragm that can see through heavy metal ion device is sealed, described can be carboxymethyl cellulose or CMC or sodium polyacrylate with the macromolecular compound of heavy metal ion reaction, its mean molecular weight is greater than 3000, and its concentration of aqueous solution is 0.0001～1.0mol/L;
(2) the above-mentioned device that contains macromolecular compound is put into the water body that contains heavy metal ion, the macromolecular compound in the device is separated with the water body tunicle;
(3) in water body, placed for 1 hour～1 year, utilize the osmosis of film, after the heavy metal ion in the water body enters into the device inside of tunicle isolation, with macromolecular compound generation chemical reaction;
(4) take out the device that is placed in the water body, measure the concentration of heavy metal, and calculate the mean concentration of heavy metal in interior water body standing time.
According to claim 1 described in water body the method for in-situ sampling, separation, enrichment, measurement heavy metal ion, it is characterized in that described heavy metal ion is selected from: Cu, Cd, Co, Zn, Pb, Ni, Cr, Fe, U, Mn, Ag, Hg, Be, Tl, Tu, Re, V, Ti.
According to claim 1 described in water body the method for in-situ sampling, separation, enrichment, measurement heavy metal ion, it is characterized in that described water body is selected from: the water in natural fresh water, sewage, potable water, recycle-water, the biosome in the water and soil earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2007100105535A CN101021515B (en) | 2007-03-09 | 2007-03-09 | Method for in-situ sampling, separating enriching and measuring heavy metal ion in water body |
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| CN2007100105535A CN101021515B (en) | 2007-03-09 | 2007-03-09 | Method for in-situ sampling, separating enriching and measuring heavy metal ion in water body |
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