CN111983137A - Method for detecting copper in electronic waste - Google Patents
Method for detecting copper in electronic waste Download PDFInfo
- Publication number
- CN111983137A CN111983137A CN202010812252.XA CN202010812252A CN111983137A CN 111983137 A CN111983137 A CN 111983137A CN 202010812252 A CN202010812252 A CN 202010812252A CN 111983137 A CN111983137 A CN 111983137A
- Authority
- CN
- China
- Prior art keywords
- sample
- solution
- copper
- temperature
- electronic waste
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 42
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 40
- 239000010949 copper Substances 0.000 title claims abstract description 40
- 239000010793 electronic waste Substances 0.000 title claims abstract description 22
- 238000004458 analytical method Methods 0.000 claims abstract description 19
- 238000004380 ashing Methods 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 9
- 238000010000 carbonizing Methods 0.000 claims abstract description 6
- 238000010304 firing Methods 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- 238000005303 weighing Methods 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 31
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 9
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 9
- 238000004448 titration Methods 0.000 claims description 9
- 229910052573 porcelain Inorganic materials 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- ZNNZYHKDIALBAK-UHFFFAOYSA-M potassium thiocyanate Chemical compound [K+].[S-]C#N ZNNZYHKDIALBAK-UHFFFAOYSA-M 0.000 claims description 6
- 229940116357 potassium thiocyanate Drugs 0.000 claims description 6
- 239000012086 standard solution Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- JGJLWPGRMCADHB-UHFFFAOYSA-N hypobromite Inorganic materials Br[O-] JGJLWPGRMCADHB-UHFFFAOYSA-N 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 4
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 3
- ALSPKRWQCLSJLV-UHFFFAOYSA-N azanium;acetic acid;acetate Chemical compound [NH4+].CC(O)=O.CC([O-])=O ALSPKRWQCLSJLV-UHFFFAOYSA-N 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000000779 smoke Substances 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims 1
- 229910052740 iodine Inorganic materials 0.000 claims 1
- 239000011630 iodine Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 abstract description 3
- 231100000167 toxic agent Toxicity 0.000 abstract description 3
- 239000003440 toxic substance Substances 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000005416 organic matter Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 5
- 239000012141 concentrate Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009614 chemical analysis method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
Abstract
The invention relates to a method for detecting copper in electronic waste, which belongs to the technical field of chemistry and metallurgy and comprises the following steps of 1) weighing; 2) carbonizing; 3) ashing: 4) transferring the sample; 5) decomposing a sample: 6) the copper content was determined by iodometry. According to the invention, the organic matter is carbonized by low-temperature firing, so that the sample is prevented from splashing and forming salts which are insoluble in acid due to quick volatilization; then high-temperature firing is carried out, so that full ashing is ensured, and simultaneously, dioxin which is a toxic substance and is not completely combusted in the electronic waste is avoided, and the safety of operation is ensured. The method is suitable for detecting copper in the electronic waste copper material, ensures that the sample can be completely decomposed, and solves the problems of poor repeatability and accuracy of the analysis result of the existing detection technology and method. The method has the advantages of good repeatability, high accuracy, strong practicability, low cost, high efficiency and the like, and the analysis result is more objective and real and is suitable for factory laboratories.
Description
Technical Field
The invention relates to a method for detecting copper in electronic waste, in particular to a method for detecting copper content by an iodometry method after sample ashing-acid dissolution treatment, and belongs to the technical field of chemistry and metallurgy.
Background
Electronic waste (waste cables, waste circuit boards, damaged electrical components, etc.) is rich in various valuable metals, and studies have indicated that the components of electronic waste are 30% plastic, 30% refractory oxide and 40% metal, with a copper content of about 20%, which is a renewable resource. In recent years, with the increasing awareness of environmental protection and the rapid development of recycling of electronic wastes, the materials enter part of copper smelting plants in a manner of copper-containing raw materials. However, the components of the electronic waste are complex and limited by detection technology, so that the normal operation of the analysis and detection process cannot be ensured, and the objective fairness of the operation and settlement data cannot be ensured. In order to solve the problem, it is necessary to provide a method for detecting copper in electronic waste, which ensures the normal operation of the analysis and detection process, and ensures the fairness and justice of the detection process and the accuracy and precision of the analysis data.
Disclosure of Invention
In order to overcome the problems in the background art, the invention provides a method for detecting copper in electronic waste, which ensures that a sample can be completely decomposed, and solves the problems of poor repeatability and accuracy of an analysis result caused by the existing detection technology and method. The method has the advantages of strong practicability, low cost and high efficiency, and is suitable for factory laboratories.
In order to realize the purpose, the invention is realized by the following technical scheme:
the method for detecting copper in electronic waste comprises the following steps:
1) weighing: folding and compacting the weighed sample on filter paper, and placing the sample into a ceramic crucible padded with 5 layers of filter paper;
2) carbonizing: putting the porcelain crucible containing the sample into a normal-temperature muffle furnace, closing the furnace door, setting the temperature at 500 ℃, opening the muffle furnace for firing, and heating to 500 ℃ within 30-40 min; when the temperature reaches 500 ℃, preserving the heat for 15 min;
3) ashing: setting the temperature of the muffle furnace to 900 ℃, slowly raising the temperature for burning, opening the furnace door when the temperature reaches 900 ℃, and burning for 30min to fully burn and incinerate the carbon;
4) transferring a sample: taking the ceramic crucible containing the sample after ashing out of the muffle furnace, cooling, transferring the sample into a 200mL beaker, and blowing water to wet the sample; adding 1-2 drops of HF and 5mLHCl into a ceramic crucible, dissolving at low temperature to 1-2mL, and adding 5mL of HNO3Dissolving to 1-2mL of solution, transferring to a beaker, and adding 1-2mLHNO3Rinsing the porcelain crucible for 3 times, and transferring the rinsing liquid into a beaker;
5) decomposing a sample: adding HCl and HNO in several times3-H2SO4Mixed acid, bromine water, HClO4Heating until the sulfuric acid smoke is exhausted, taking down and cooling, adding 2mLHCl, heating at low temperature to dissolve to 0.5-1mL in volume, blowing 30-35mL of water to wash the cup wall and the watch glass, covering the watch glass, boiling until the solution is clear to completely dissolve soluble salts, taking down and washing the cup wall and the watch glass with water, and cooling to room temperature;
6) the copper content was determined by iodometry.
Further preferably, in the step 1), 0.20-0.30 g of the sample is weighed to be accurate to 0.0001 g.
Further preferably, in the steps 4) to 5), the low temperature is 80 to 100 ℃.
Further preferably, in the step 5), HCl and HNO are added in a plurality of times3-H2SO4Mixed acid, bromine water, HClO4Heating until the sulfuric acid is exhausted, and the specific steps are as follows: adding 10mLHCl into a beaker, covering a surface dish, heating to about 5mL of volume at low temperature, and taking down the beaker for slight cooling; 15mL (7+3) of HNO was added3-H2SO4Mixed acid, 2mL of bromine water, 2mLHClO4Heating to near dry, taking down and cooling.
Further preferably, the step of determining the copper content by iodometry comprises the following steps:
a. and (3) acidity adjustment: dropwise adding acetic acid-ammonium acetate solution until stable red appears and the excessive amount is 4mL, and supplementing 1mL of 150g/L ferric chloride solution if the iron content is low; dropwise adding an ammonium bifluoride solution (250g/L) until the red color of the solution disappears, and adding 4mL of the solution in an excessive amount, and fully shaking;
b. titration: adding 2g of potassium iodide, shaking gently to mix the potassium iodide and the potassium thiocyanate, immediately titrating the mixture to light yellow by using a sodium thiosulfate standard solution, adding 2mL of a starch solution (5g/L), continuously titrating the mixture to light blue, adding 2mL of a potassium thiocyanate solution, shaking uniformly and continuously titrating the mixture until the blue color is completely disappeared to obtain an end point;
c. calculating an analysis result:
in the formula:
f is the titration coefficient of the sodium thiosulfate standard solution to copper, g/mL;
v is the volume of the consumed standard titration solution of sodium thiosulfate in mL when the sample is titrated;
ms-mass of sample, g.
The invention has the beneficial effects that:
according to the invention, the filter paper is used for wrapping the sample for burning, so that the loss of the sample such as splashing, adhesion and the like in the carbonization and ashing processes is prevented; the organic matter is carbonized through low-temperature firing, so that the sample is prevented from splashing and forming salts which are insoluble in acid due to quick volatilization; the furnace door is opened at the high temperature of 900 ℃ for firing, so that full ashing is ensured, and simultaneously, the situation that the toxic substance dioxin is not completely combusted due to the materials in the electronic waste is avoided, and the operation safety is ensured. The method is suitable for detecting copper in the electronic waste copper material, ensures that the sample can be completely decomposed, and solves the problems of poor repeatability and accuracy of the analysis result of the existing detection technology and method. The method has the advantages of good repeatability, high accuracy, strong practicability, low cost, high efficiency and the like, and the analysis result is more objective and real and is suitable for factory laboratories.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, preferred embodiments of the present invention will be described in detail below to facilitate understanding of the skilled person.
Examples
The technical method comprises the following steps:
1) weighing: the method comprises the steps of placing a piece of filter paper on an electronic balance, weighing 0.20-0.30 g (accurate to 0.0001g) of sample on the filter paper, folding and compacting the filter paper, and placing the filter paper into a 50mL porcelain crucible filled with 5 layers of filter paper. The sample is wrapped by filter paper, so that the sample is prevented from splashing loss and loss of adhesion to the bottom of the crucible in the carbonization and ashing processes.
2) Carbonizing: putting the porcelain crucible containing the sample into a normal-temperature muffle furnace, closing a furnace door, setting the temperature to be 500 ℃, opening the muffle furnace to burn, heating to 500 ℃ within 30-40min, carbonizing at low temperature to destroy organic matters (polycarbonate resin, polyethylene and the like) so as to convert the organic matters in the sample into carbon, and preserving the temperature for 15min when the temperature reaches 500 ℃. The slow ashing is adopted, the organic matters are carbonized at low temperature, and the phenomena that the sample is splashed and salts which are difficult to dissolve in acid are formed due to quick volatilization are avoided.
3) Ashing: setting the temperature to 900 ℃, starting a muffle furnace to burn, slowly heating, carbonizing at low temperature to destroy organic matters, converting the organic matters in the sample into carbon, starting a furnace door when the temperature reaches 900 ℃, and burning for 30 min. The furnace door is opened to allow oxygen to enter, thereby ensuring complete combustion and ashing of carbon, avoiding the electronic waste from being burnt incompletely to generate toxic substance dioxin, and ensuring the safety of operation.
4) Transferring a sample: the ashed porcelain containing the sampleThe crucible was removed from the muffle furnace, cooled, and the sample was transferred to a 200mL beaker and 5mL of water was blown to wet the sample. Dripping 1-2 drops of HF and 5mLHCl into a ceramic crucible, dissolving the mixture to 1-2mL at 80-100 ℃, and adding 5mL of HNO3Dissolving to 1-2mL of solution, transferring to a beaker, and adding 1-2mLHNO3The porcelain crucible was rinsed 3 times and the rinse solution was transferred to a beaker.
5) Decomposing a sample: adding 10mLHCl into a beaker, covering a watch glass, placing the beaker on an electric furnace at 80-100 ℃, heating the beaker to about 5mL in volume, and taking the beaker down for cooling; 15mL (7+3) of HNO was added3-H2SO4Mixed acid, 2mL of bromine water, 2mLHClO4Heating to near dry (sulfuric acid is exhausted), taking down and cooling; adding 2mLHCl, heating to 80-100 deg.C to dissolve to 0.5-1mL, blowing 30-35mL of water to wash the cup wall and watch glass, covering the watch glass, boiling on a low-temperature (80-100 deg.C) electric heating plate until the solution is clear and the soluble salts are completely dissolved, taking off, washing the cup wall and watch glass with a small amount of water, and cooling to room temperature. After the sulfuric acid fume is exhausted, part of the solid is water-insoluble and slightly soluble substances, the possibility of low analysis grade caused by wrapping copper exists, and the HCl is added to dissolve the water-insoluble and slightly soluble substances so as to avoid wrapping.
6) And (3) acidity adjustment: the acetic acid-ammonium acetate solution is added dropwise until a stable red color appears (1 mL of 150g/L ferric trichloride solution is added when the iron content is low) and the solution is excessive by 4mL, the ammonium bifluoride solution (250g/L) is added dropwise until the red color disappears and the solution is excessive by 4mL, and the mixture is fully shaken.
7) Titration: adding 2g of potassium iodide, shaking gently to mix the potassium iodide and the potassium thiocyanate, immediately titrating the mixture to light yellow by using a sodium thiosulfate standard solution, adding 2mL of a starch solution (5g/L), continuously titrating the mixture to light blue, adding 2mL of a potassium thiocyanate solution, shaking uniformly and continuously titrating the mixture until the blue color is completely disappeared to obtain the end point.
8) Calculating an analysis result:
in the formula:
f is the titration coefficient of the sodium thiosulfate standard solution to copper, g/mL;
v is the volume of the consumed standard titration solution of sodium thiosulfate in mL when the sample is titrated;
ms-mass of sample, g.
Results analysis of examples and control groups
1) Control group experiment: 6 experimental samples were taken, according to the first part of the chemical analysis method of copper concentrates of the national standard GB/T3884.1-2012: the copper content is detected by a measuring method, and the data is shown in table 1;
2) and (3) repeatability experiment: taking 6 experimental samples of a control group and 1 certified national standard substance ZBK-338, detecting according to the steps 1) to 8) of the invention, and the data are shown in Table 2;
3) accuracy experiment: 6 control samples were taken and 0.02g (to the nearest 0.0001) of 5N high purity copper plate was added to each sample and tested according to steps 1) -8) of the invention, the data are shown in Table 3.
TABLE 1 control group Experimental data
TABLE 2 repeatability test data
TABLE 3 accuracy test data
For the detection of the copper content in the copper-containing raw materials, a detection method of the copper content in copper concentrate is adopted for detection, the sample cannot be completely decomposed, the data in the table 1 is analyzed, the relative standard does not meet the requirement, the repeatability of the analysis data is poor, the reliability of the analysis result is poor, and the method is not suitable for the copper-containing raw materials; after the method is adopted for analysis, a sample can be completely decomposed, the data in the table 2 are analyzed, the fixed value of the certified standard substance is 20.56%, the average result of six independent analyses of the certified standard substance is 20.56%, the goodness of fit with the fixed value is high, the range value of the six analyses is only 0.06%, the relative standard deviation of the method is only 0.05-0.13%, and the method meets the repeatability requirement; the standard recovery rate of the method reaches 99.42-102.64%, and the method meets the accuracy requirement.
In conclusion, the relative standard deviation of the method for detecting the copper content in the electronic waste provided by the invention is reduced by 20-100 times compared with the relative standard deviation of the copper content determination (GB/T3884.1-2012) in the copper concentrate. Therefore, the method provided by the invention is more suitable for detecting the copper content in the electronic waste, and solves the problems of incomplete sample decomposition, and poor analysis result repeatability and accuracy caused by the existing detection technology and method.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (4)
1. A method for detecting copper in electronic waste is characterized by comprising the following steps: the method comprises the following steps:
1) weighing: folding and compacting the weighed sample on filter paper, and placing the sample into a ceramic crucible padded with 5 layers of filter paper;
2) carbonizing: putting the porcelain crucible containing the sample into a normal-temperature muffle furnace, closing the furnace door, setting the temperature at 500 ℃, opening the muffle furnace for firing, and heating to 500 ℃ within 30-40 min; when the temperature reaches 500 ℃, preserving the heat for 15 min;
3) ashing: setting the temperature of the muffle furnace to 900 ℃, slowly raising the temperature for burning, opening the furnace door when the temperature reaches 900 ℃, and burning for 30min to fully burn and incinerate the carbon;
4) transferring a sample: taking the ceramic crucible containing the sample after ashing out of the muffle furnace, cooling, transferring the sample into a beaker, and blowing water to wet the sample; adding 1-2 drops of HF and 5mL of HCl into a ceramic crucible, dissolving at low temperature to 1-2mL, and adding 5mL of HNO3Dissolving to volume of solutionTransferring to a beaker after 1-2mL, adding 1-2mL of HNO3Rinsing the porcelain crucible for 3 times, and transferring the rinsing liquid into a beaker;
5) decomposing a sample: adding HCl and HNO in several times3-H2SO4Mixed acid, bromine water, HClO4Heating until the sulfuric acid smoke is exhausted, taking down and cooling, adding 2mL of HCl, heating at low temperature to dissolve to 0.5-1mL of volume, blowing 30-35mL of water to wash the cup wall and the watch glass, covering the watch glass, boiling until the solution is clear to completely dissolve soluble salts, taking down and blowing the cup wall and the watch glass with water, cooling to room temperature, blowing water to boil, and cooling to room temperature;
6) the copper content was determined by iodometry.
2. The method for detecting copper in electronic waste according to claim 1, wherein the method comprises the following steps: in the step 1), 0.20-0.30 g of sample is weighed, and the precision is 0.0001 g.
3. The method for detecting copper in electronic waste according to claim 1 or 2, wherein: in steps 4) -5), the low temperature means 80-100 ℃.
4. The method for detecting copper in electronic waste according to claim 1, wherein the method comprises the following steps: the iodine method for measuring the copper content comprises the following steps:
a. and (3) acidity adjustment: dropwise adding acetic acid-ammonium acetate solution until stable red appears and the excessive amount is 4mL, and supplementing 1mL of 150g/L ferric chloride solution if the iron content is low; dropwise adding an ammonium bifluoride solution (250g/L) until the red color of the solution disappears, and adding 4mL of the solution in an excessive amount, and fully shaking;
b. titration: adding 2g of potassium iodide, shaking gently to mix the potassium iodide and the potassium thiocyanate, immediately titrating the mixture to light yellow by using a sodium thiosulfate standard solution, adding 2mL of a starch solution (5g/L), continuously titrating the mixture to light blue, adding 2mL of a potassium thiocyanate solution, shaking uniformly and continuously titrating the mixture until the blue color is completely disappeared to obtain an end point;
c. calculating an analysis result:
in the formula:
f is the titration coefficient of the sodium thiosulfate standard solution to copper, g/mL;
v is the volume of the consumed standard titration solution of sodium thiosulfate in mL when the sample is titrated;
ms-mass of sample, g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010812252.XA CN111983137A (en) | 2020-08-13 | 2020-08-13 | Method for detecting copper in electronic waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010812252.XA CN111983137A (en) | 2020-08-13 | 2020-08-13 | Method for detecting copper in electronic waste |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111983137A true CN111983137A (en) | 2020-11-24 |
Family
ID=73434281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010812252.XA Pending CN111983137A (en) | 2020-08-13 | 2020-08-13 | Method for detecting copper in electronic waste |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111983137A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101046453A (en) * | 2007-04-24 | 2007-10-03 | 青海西部矿业科技有限公司 | Iodometry process of measuring gold content in high accuracy and precision |
| US20090194430A1 (en) * | 2008-01-31 | 2009-08-06 | Eci Technology, Inc. | Analysis of copper ion and complexing agent in copper plating baths |
| CN109085286A (en) * | 2018-08-29 | 2018-12-25 | 长春黄金研究院有限公司 | The measuring method of amount of copper in a kind of slag copper core sample of efficiently and accurately |
| CN110257640A (en) * | 2019-07-25 | 2019-09-20 | 广东省资源综合利用研究所 | A kind of method that wiring board burns cigarette ash comprehensive reutilization |
| CN111983174A (en) * | 2020-08-13 | 2020-11-24 | 楚雄滇中有色金属有限责任公司 | Scrap copper inspection method based on molten copper |
-
2020
- 2020-08-13 CN CN202010812252.XA patent/CN111983137A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101046453A (en) * | 2007-04-24 | 2007-10-03 | 青海西部矿业科技有限公司 | Iodometry process of measuring gold content in high accuracy and precision |
| US20090194430A1 (en) * | 2008-01-31 | 2009-08-06 | Eci Technology, Inc. | Analysis of copper ion and complexing agent in copper plating baths |
| CN109085286A (en) * | 2018-08-29 | 2018-12-25 | 长春黄金研究院有限公司 | The measuring method of amount of copper in a kind of slag copper core sample of efficiently and accurately |
| CN110257640A (en) * | 2019-07-25 | 2019-09-20 | 广东省资源综合利用研究所 | A kind of method that wiring board burns cigarette ash comprehensive reutilization |
| CN111983174A (en) * | 2020-08-13 | 2020-11-24 | 楚雄滇中有色金属有限责任公司 | Scrap copper inspection method based on molten copper |
Non-Patent Citations (7)
| Title |
|---|
| 张冬梅: "《岩石矿物分析》", 30 April 2014, 地质出版社 * |
| 欧杨娇: "高硅铜渣物料中铜的分析方法研究", 《云南冶金》 * |
| 熊昭春 等: "《泡塑吸附技术研究及其在化学分析中的应用》", 30 June 1992 * |
| 王福荣: "《生物工程分析与检验》", 30 June 2005 * |
| 肖红新 等: "废弃线路板化学分析采样、制样及检测方法" * |
| 肖红新 等: "废弃线路板化学分析采样、制样及检测方法", 《化学分析计量》 * |
| 马鞍山矿山研究院: "《黑色金属矿石分析》", 30 April 1977 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103149074B (en) | X-ray fluorescence spectra analyzes the MTG YBCO bulk method of molybdenum, manganese, vanadium or ferrochrome sample | |
| CN105044097B (en) | The rapid analysis method of lead in a kind of gold mud | |
| CN101470078A (en) | Method for measuring content of iron element in different valence states in lithium iron phosphate anode material | |
| Luke et al. | Photometric determination of germanium with phenylfluorone | |
| CN110672785B (en) | Detection method for trace metal elements in coke and application thereof | |
| CN110487758B (en) | Method for measuring arsenic, selenium and lead in coal-fired power plant coal and combustion byproducts thereof | |
| CN111983137A (en) | Method for detecting copper in electronic waste | |
| CN112858602A (en) | Method for rapidly detecting heavy metals in grains and application | |
| CN112710775A (en) | Method for determining content of uranium in uranium-carbon-oxygen | |
| CN111307797A (en) | Combined determination method for tungsten and silicon content in ferrotungsten | |
| Mills | An acid dissolution procedure for the determination of boron in coal ash and silicates by inductively-coupled plasma emission spectrometry with conventional glass nebulizers | |
| CN115452807A (en) | Method for recovering rhodium and ruthenium in waste residues and method for detecting rhodium and ruthenium in waste residues | |
| Walkley | The determination of zinc in plant materials. | |
| Barefoot et al. | Fire assay for iridium | |
| Luke | Determination of Small Amounts of Arsenic, Antimony, and Tin in Lead and Lead Alloys | |
| Hastings et al. | Direct Photometric Determination of Iron, Titanium, and Copper in Tantalum and Its Oxide | |
| CN106769941B (en) | Method for detecting phosphorus content in biodiesel | |
| CN105548145A (en) | Method for testing cast-weld lead slag Sn of lead-acid storage battery | |
| CN108459014A (en) | A kind of assay method of Leaching of Gold Using Thiosulfate GOLD FROM PLATING SOLUTION content | |
| KAKITA et al. | Rapid Determination of Aluminium in Iron and Steel | |
| CN112082897A (en) | Method for measuring carbon content in secondary zinc oxide powder leaching residue | |
| Burelbach et al. | Summary Report on the Determination of Impurity Elements in AMES Thorium Billet A-520 | |
| Hallinan | Determination of Iron in Water A Modified Colorimetric Procedure | |
| CN107188219B (en) | A method of silver sulfate is recycled from CODCr measurement waste liquid | |
| CN117191774A (en) | Detection method for determining iron content in copper slag concentrate by potassium borohydride reduction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201124 |
|
| RJ01 | Rejection of invention patent application after publication |