CN105466982B - Heavy metal detection method in water - Google Patents
Heavy metal detection method in water Download PDFInfo
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- CN105466982B CN105466982B CN201511028515.3A CN201511028515A CN105466982B CN 105466982 B CN105466982 B CN 105466982B CN 201511028515 A CN201511028515 A CN 201511028515A CN 105466982 B CN105466982 B CN 105466982B
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- 238000001514 detection method Methods 0.000 title claims abstract description 77
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 238000004090 dissolution Methods 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 150000002500 ions Chemical class 0.000 claims description 36
- 239000003792 electrolyte Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000011149 active material Substances 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 7
- 229910052793 cadmium Inorganic materials 0.000 claims description 5
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 5
- BQPIGGFYSBELGY-UHFFFAOYSA-N mercury(2+) Chemical compound [Hg+2] BQPIGGFYSBELGY-UHFFFAOYSA-N 0.000 claims description 5
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 210000004027 cell Anatomy 0.000 description 26
- 238000005259 measurement Methods 0.000 description 25
- 239000000243 solution Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- 238000007792 addition Methods 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 6
- 239000000284 extract Substances 0.000 description 6
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 6
- 229910052753 mercury Inorganic materials 0.000 description 6
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 239000012086 standard solution Substances 0.000 description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 3
- 238000003556 assay Methods 0.000 description 3
- WLZRMCYVCSSEQC-UHFFFAOYSA-N cadmium(2+) Chemical compound [Cd+2] WLZRMCYVCSSEQC-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002848 electrochemical method Methods 0.000 description 3
- RVPVRDXYQKGNMQ-UHFFFAOYSA-N lead(2+) Chemical compound [Pb+2] RVPVRDXYQKGNMQ-UHFFFAOYSA-N 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 238000011895 specific detection Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- 229960000583 acetic acid Drugs 0.000 description 2
- 229940040526 anhydrous sodium acetate Drugs 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 2
- 239000012362 glacial acetic acid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- -1 optionally Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000003968 anodic stripping voltammetry Methods 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012490 blank solution Substances 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 229940075397 calomel Drugs 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical compound Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002001 electrolyte material Substances 0.000 description 1
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003950 stripping voltammetry Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1813—Specific cations in water, e.g. heavy metals
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The present invention provides heavy metal detection method in water, heavy metal detection method in the water the following steps are included: (A1) by volume be V0The liquid containing heavy metal ion to be measured send to detection cell, obtain the peak point current P of heavy metal ion to be measured dissolution01；It (A2) is V by volume1Water sample send to the detection cell, mixed with the liquid in the detection cell, obtain the peak point current P of heavy metal ion to be measured dissolutions；(A3) mixed liquor in the detection cell is discharged, cleans the detection cell；It (A4) is V by volume0The liquid containing heavy metal ion to be measured send to detection cell, obtain the peak point current P of heavy metal ion to be measured dissolution02；It (A5) is V by volume1Heavy metal ion correcting fluid to be measured send to the detection cell, mixed with the liquid in the detection cell, obtain the peak point current P of heavy metal ion to be measured dissolutionb；(A6) concentration of heavy metal ion C to be measured in water sample is obtainedsAre as follows:The present invention has many advantages, such as that high reliablity, monitoring are accurate.
Description
Technical field
The present invention relates to heavy metal analysis, in particular to heavy metal detection method in water.
Background technique
Heavy metal is a kind of common contaminant, once human body is easily entered by biological concentration and cumulative function into water body
And cause injuries of tissues and organs.Currently, the instruments such as atomic fluorescence, atomic absorption spectrum and inductively coupled plasma mass spectrometry by
In expensive and inconvenient, it is not suitable for the quick on-line monitoring of water quality heavy metal.It is online based on anodic stripping voltammetry
Monitor, due at low cost, high sensitivity, strong antijamming capability and it is quick and convenient the features such as, be the following reply water quality heavy metal
One of the important means of fast slowdown monitoring.
Majority water quality on-line analysis monitor is all made of calibration curve method at present and standard addition method carries out test substance
It tests and analyzes, if Chinese patent CN101563603A discloses improved online moisture analysis, just uses the above method in the patent
And combine the measurement of photosensitive working electrode realization chemical oxygen demand of water body.Chinese patent CN102183668A discloses heavy metal and exists
Line analysis instrument updates the mode of automatic calibration cycle after proposing 5 measurement periods in the patent, and uses unified blank value
Sample detection value is calculated with standard value.However, the system heavy-metal residual in continuous mode necessarily will cause standard sample and sample
The blank value of measurement differs greatly, and the final result deviation calculated according to same blank value is also relatively large.Meanwhile being based on anode
The dissolution signal of stripping voltammetry working electrode is larger by external condition interference, and Jasinski et al. has studied discovery temperature to glass
The dissolution effect of signals of carbon working electrode is significant.Therefore, it measures and the inconsistent and heavy-metal residual of calibration condition will necessarily
Cause measurement result deviation larger.In addition, it is steady to will affect result when working electrode exposure air and coated surface formation calomel
It is qualitative；The golden disk working electrode activity for analyzing mercury and arsenic is blunt, dissolves out peak base and jitter and easily drifts about.
Summary of the invention
In order to solve the deficiency in above-mentioned prior art, the present invention provides in a kind of accurate, good reliability water
Heavy metal detection method.
The purpose of the present invention is what is be achieved through the following technical solutions:
Heavy metal detection method in water, heavy metal detection method in the water the following steps are included:
It (A1) is V by volume0The liquid containing heavy metal ion to be measured send to detection cell, obtain heavy metal ion to be measured
The peak point current P of dissolution01；
(A2) water sample that volume is V1 is sent to the detection cell, is mixed with the liquid in the detection cell, obtained to be measured
The peak point current P of heavy metal ion dissolutions；
(A3) mixed liquor in the detection cell is discharged, cleans the detection cell；
It (A4) is V by volume0The liquid containing heavy metal ion to be measured send to detection cell, obtain heavy metal ion to be measured
The peak point current P of dissolution02；
(A5) the heavy metal ion correcting fluid to be measured that volume is V1 is sent to the detection cell, with the liquid in the detection cell
Body mixing obtains the peak point current P of heavy metal ion dissolution to be measuredb；
(A6) concentration of heavy metal ion C to be measured in water sample is obtainedsAre as follows:
According to heavy metal detection method in above-mentioned water, optionally, step (A2) and step (A5) are exchanged.
According to heavy metal detection method in above-mentioned water, it is preferable that in step (A1), step (A4), the liquid of addition
For electrolyte or electroplate liquid.
According to heavy metal detection method in above-mentioned water, optionally, active substance is added in the liquid.
According to heavy metal detection method in above-mentioned water, it is preferable that heavy metal ion to be measured is lead, cadmium, copper or zinc ion
When, the active material that electroplate liquid is added is chloride；When heavy metal ion to be measured is mercury ion, the active material of electrolyte is added
It is bichromate.
According to heavy metal detection method in above-mentioned water, optionally, in detection of heavy metal ion, the work used is electric
The end of pole, reference electrode and auxiliary electrode is submerged in the solution in the detection cell always.
According to heavy metal detection method in above-mentioned water, it is preferable that the working electrode is glass carbon working electrode or golden disk
Working electrode.
Compared with prior art, the device have the advantages that are as follows:
1. being all made of the measurement of substrate blank solution before sample and correcting fluid analysis, effectively solve because of detection cell and electrode surface
Heavy-metal residual and the problem of influence measurement result；
2. be corrected the Synchronization Analysis of liquid, as real time correction in each measurement period, can solve to a certain degree because
The problem of ambient temperature fluctuates and influences measurement result；
3. adding a certain amount of heavy metal ion to be measured in electroplate liquid or electrolyte, ion concentration to be measured can be improved to it
Linearity test section increases linearity and measurement results reliability；
4. adding a certain amount of active material in electroplate liquid or electrolyte can be improved working electrode electro-chemical activity, increase dissolution
The stability of peak base and peak shape improves the reliability of measurement result；
5. impregnating the glass carbon of working electrode and golden disk always in the solution, coated surface can be effectively prevent because of exposure air
In and wreck, and electrode hydrophily can be effectively improved.
Detailed description of the invention
Referring to attached drawing, the disclosure of the present invention will become more readily understood.Skilled addressee readily understands that: this
It is only used to illustrate the technical scheme of the present invention for a little attached drawings, and is not intended to limit the scope of protection of the present invention.
In figure:
Fig. 1 is the flow chart of heavy metal detection method in water according to an embodiment of the present invention.
Specific embodiment
Fig. 1 and following description describe optional embodiment of the invention with instruct those skilled in the art how to implement and
Reproduce the present invention.In order to teach the technical scheme of the invention, it has simplified or omitted some conventional aspects.Those skilled in the art answer
The variation or replacement that the understanding is originated from these embodiments will within the scope of the invention.Under those skilled in the art should understand that
Stating feature can combine in various ways to form multiple modifications of the invention.The invention is not limited to following optional as a result,
Embodiment, and be only limited by the claims and their equivalents.
Embodiment 1:
Fig. 1 schematically illustrates the flow chart of heavy metal detection method in the water of the embodiment of the present invention, as shown in Figure 1,
Heavy metal detection method in the water the following steps are included:
It (A1) is V by volume0The liquid containing heavy metal ion to be measured send to detection cell, obtain heavy metal ion to be measured
The peak point current P of dissolution01；If heavy metal ion to be measured is lead, cadmium, copper or when zinc ion, additions liquid is electroplate liquid, and the electricity
Active material, such as chloride are additionally added in plating solution；When such as heavy metal ion to be measured is mercury ion, the liquid of addition is electrolyte,
And active material, such as bichromate are additionally added in the electrolyte；
It (A2) is V by volume1Water sample send to the detection cell, mixed with the liquid in the detection cell, obtain it is to be measured
The peak point current P of heavy metal ion dissolutions；
(A3) mixed liquor in the detection cell is discharged, cleans the detection cell；
It (A4) is V by volume0The liquid containing heavy metal ion to be measured send to detection cell, obtain heavy metal ion to be measured
The peak point current P of dissolution02；
It (A5) is V by volume1Heavy metal ion correcting fluid to be measured send to the detection cell, with the liquid in the detection cell
Body mixing obtains the peak point current P of heavy metal ion dissolution to be measuredb；
(A6) concentration of heavy metal ion C to be measured in water sample is obtainedsAre as follows:
Optionally, step (A2) and step (A5) are exchanged.
For guard electrode, further, in detection of heavy metal ion, the working electrode that uses, reference electrode and auxiliary
The end of electrode is helped to be submerged in the solution in the detection cell always.The working electrode is glass carbon working electrode or Jin Pangong
Make electrode.
Embodiment 2:
The application examples of heavy metal detection method measurement of lead content in water body according to embodiments of the present invention 1 water.
In the application examples, working electrode uses glass carbon working electrode, and specific detection method includes the following steps:
(B1) electroplate liquid is prepared: a certain amount of anhydrous sodium acetate (NaAc) and sodium chloride are accurately weighed on assay balance
(NaCl) it in volumetric flask, and takes the glacial acetic acid (HAc) of certain volume after above-mentioned volumetric flask, deionized water is added to keep solid complete
Dissolution, then the mercury standard solution and lead standard solution of certain volume are accurately pipetted, after deionized water constant volume；
(A1) extract certain volume above-mentioned electroplate liquid in detection cell, accumulating potential -1.1V, enrichment time 60s simultaneously
The lower enrichment for realizing lead ion of stirring, setting scanning range is -0.9~0.35V, carries out the molten of lead ion using Anodic stripping
Out, and dissolution peak-to-peak signal is recorded, the above process is zero point measurement；
(A2) after zero point is measured, the sample for extracting certain volume is directly added into above-mentioned solution, and setting is surveyed with zero point
Identical electrochemical parameter is measured, enrichment dissolution record dissolution peak-to-peak signal realizes sample measurement；
(A3) it after sample is measured, extracts solution in detection cell out and cleans detection cell；
(A4) measurement of another zero point is completed by above-mentioned zero point measurement method；
(A5) correcting fluid that known concentration is added on the basis of step (A4) carries out electrochemical measurement, and enrichment dissolution records molten
Peak-to-peak signal out realizes correcting fluid measurement；
(A6) plumbum ion concentration in water is known according to the volume of the solution of above-mentioned addition and dissolution peak point current.
Embodiment 3:
Application examples of the heavy metal detection method in the measurement of Cadmium In The Water Body content according to embodiments of the present invention 1 water.
In the application examples, working electrode uses glass carbon working electrode, and specific detection method includes the following steps:
(B1) electroplate liquid is prepared: a certain amount of anhydrous sodium acetate (NaAc) and sodium chloride are accurately weighed on assay balance
(NaCl) it in volumetric flask, and takes the glacial acetic acid (HAc) of certain volume after above-mentioned volumetric flask, deionized water is added to keep solid complete
Dissolution, then the mercury standard solution and cadmium standard solution of certain volume are accurately pipetted, after deionized water constant volume；
(A1) extract certain volume above-mentioned electroplate liquid in detection cell, accumulating potential -1.1V, enrichment time 60s simultaneously
The lower enrichment for realizing cadmium ion of stirring, setting scanning range is -0.9~0.35V, carries out the molten of cadmium ion using Anodic stripping
Out, and dissolution peak-to-peak signal is recorded, the above process is zero point measurement；
(A2) after zero point is measured, the sample for extracting certain volume is directly added into above-mentioned solution, and setting is surveyed with zero point
Identical electrochemical parameter is measured, enrichment dissolution record dissolution peak-to-peak signal realizes sample measurement；
(A3) it after sample is measured, extracts solution in detection cell out and cleans detection cell；
(A4) measurement of another zero point is completed by above-mentioned zero point measurement method；
(A5) correcting fluid that known concentration is added on the basis of step (A4) carries out electrochemical measurement, and enrichment dissolution records molten
Peak-to-peak signal out realizes correcting fluid measurement；
(A6) concentration of cadmium ions in water is known according to the volume of the solution of above-mentioned addition and dissolution peak point current.
Embodiment 4:
Application examples of the heavy metal detection method in the measurement of Mercury in Water Body content according to embodiments of the present invention 1 water.
In the application examples, working electrode is using golden disk working electrode, and specific detection method includes the following steps:
(B1) a certain amount of potassium chloride (KCl) and bichromate electrolyte quota: are accurately weighed on assay balance in capacity
In bottle, deionized water is added and makes it completely dissolved, then takes a certain amount of concentrated nitric acid and mercury standard solution in volumetric flask, uses deionization
Water is diluted to graticule, shakes up；
(A1) extract certain volume above-mentioned electroplate liquid in detection cell, accumulating potential 0.2V, enrichment time 180s simultaneously
The lower enrichment for realizing mercury ion of stirring, setting scanning range is 0.2~0.7V, carries out the molten of mercury ion using Anodic stripping
Out, and dissolution peak-to-peak signal is recorded, the above process is zero point measurement；
(A2) correcting fluid that known concentration is added on the basis of step (A1) carries out electrochemical measurement, and enrichment dissolution records molten
Peak-to-peak signal out realizes correcting fluid measurement；
(A3) it after being measured, extracts solution in detection cell out and cleans detection cell；
(A4) measurement of another zero point is completed by above-mentioned zero point measurement method；
(A5) after zero point is measured, the sample for extracting certain volume is directly added into the solution of step (A4), setting with
Zero point measures identical electrochemical parameter, and enrichment dissolution record dissolution peak-to-peak signal realizes sample measurement；
(A6) ion concentration of mercury in water is known according to the volume of the solution of above-mentioned addition and dissolution peak point current.
Claims (7)
1. heavy metal detection method in water, heavy metal detection method in the water the following steps are included:
It (A1) is V by volume0The liquid containing heavy metal ion to be measured send to detection cell, obtain heavy metal ion to be measured dissolution
Peak point current P01；
(A2) water sample that volume is V1 is sent to the detection cell, is mixed with the liquid in the detection cell, obtains a huge sum of money to be measured
Belong to the peak point current P of Ion releases；
(A3) mixed liquor in the detection cell is discharged, cleans the detection cell；
It (A4) is V by volume0The liquid containing heavy metal ion to be measured send to detection cell, obtain heavy metal ion to be measured dissolution
Peak point current P02；
(A5) the heavy metal ion correcting fluid to be measured that volume is V1 is sent to the detection cell, it is mixed with the liquid in the detection cell
It closes, obtains the peak point current P of heavy metal ion dissolution to be measuredb；
(A6) concentration of heavy metal ion C to be measured in water sample is obtainedsAre as follows:
2. heavy metal detection method in water according to claim 1, it is characterised in that: step (A2) and step (A5) are adjusted
It changes.
3. heavy metal detection method in water according to claim 1, it is characterised in that: in step (A1), step (A4),
The liquid of addition is electrolyte or electroplate liquid.
4. heavy metal detection method in water according to claim 3, it is characterised in that: active object is added in the liquid
Matter.
5. heavy metal detection method in water according to claim 4, it is characterised in that: heavy metal ion to be measured be lead, cadmium,
When copper or zinc ion, the active material that electroplate liquid is added is chloride；When heavy metal ion to be measured is mercury ion, electrolyte is added
Active material be bichromate.
6. heavy metal detection method in water according to claim 1, it is characterised in that: in detection of heavy metal ion, make
The end of working electrode, reference electrode and auxiliary electrode is submerged in the solution in the detection cell always.
7. heavy metal detection method in water according to claim 6, it is characterised in that: the working electrode is the work of glass carbon
Electrode or golden disk working electrode.
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| CN106198914B (en) * | 2016-07-07 | 2017-08-01 | 深圳市朗石科学仪器有限公司 | The system and method for mercury content in a kind of measurement water sample |
| CN109682922A (en) * | 2019-01-23 | 2019-04-26 | 侯萍 | A kind of water quality detection method |
| CN116081860A (en) * | 2022-12-07 | 2023-05-09 | 吉林农业大学 | Method for treating wastewater by using magnetic hydrogel and application |
| CN116735677A (en) * | 2023-05-31 | 2023-09-12 | 中国地质科学院水文地质环境地质研究所 | A method for investigating heavy metal contaminated sites based on groundwater level fluctuation effect |
| CN116953040B (en) * | 2023-07-27 | 2025-08-15 | 汉威科技集团股份有限公司 | Method for detecting heavy metals in water |
| CN119224097B (en) * | 2024-09-30 | 2025-08-29 | 中国科学院南京土壤研究所 | An ASV heavy metal in-situ detection system and method considering the interference of groundwater environmental factors |
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| CN104076083A (en) * | 2014-06-25 | 2014-10-01 | 施世英 | Heavy metal ion concentration test method adopting secondary sample injection |
| CN104569455A (en) * | 2014-12-31 | 2015-04-29 | 聚光科技(杭州)股份有限公司 | Water quality monitoring method |
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| SG177021A1 (en) * | 2010-06-16 | 2012-01-30 | Univ Nanyang Tech | Micoelectrode array sensor for detection of heavy metals in aqueous solutions |
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