CN111812045A - Method for measuring phosphorus content in high-carbon ferrochrome - Google Patents
Method for measuring phosphorus content in high-carbon ferrochrome Download PDFInfo
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- CN111812045A CN111812045A CN202010613558.2A CN202010613558A CN111812045A CN 111812045 A CN111812045 A CN 111812045A CN 202010613558 A CN202010613558 A CN 202010613558A CN 111812045 A CN111812045 A CN 111812045A
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 42
- 239000011574 phosphorus Substances 0.000 title claims abstract description 42
- 229910000604 Ferrochrome Inorganic materials 0.000 title claims abstract description 39
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000243 solution Substances 0.000 claims abstract description 64
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims abstract description 30
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 27
- 239000012452 mother liquor Substances 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 229940074439 potassium sodium tartrate Drugs 0.000 claims abstract description 16
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 15
- 229960005070 ascorbic acid Drugs 0.000 claims abstract description 15
- 235000010323 ascorbic acid Nutrition 0.000 claims abstract description 15
- 239000011668 ascorbic acid Substances 0.000 claims abstract description 15
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004327 boric acid Substances 0.000 claims abstract description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims abstract description 14
- 238000002835 absorbance Methods 0.000 claims abstract description 14
- RXPAJWPEYBDXOG-UHFFFAOYSA-N hydron;methyl 4-methoxypyridine-2-carboxylate;chloride Chemical compound Cl.COC(=O)C1=CC(OC)=CC=N1 RXPAJWPEYBDXOG-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000002844 melting Methods 0.000 claims abstract description 9
- 230000008018 melting Effects 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 238000011161 development Methods 0.000 claims abstract description 4
- 239000011259 mixed solution Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 19
- 230000004907 flux Effects 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- 238000010309 melting process Methods 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 239000011609 ammonium molybdate Substances 0.000 claims description 3
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 3
- 229940010552 ammonium molybdate Drugs 0.000 claims description 3
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 3
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 claims description 3
- 235000011006 sodium potassium tartrate Nutrition 0.000 claims description 3
- 235000011007 phosphoric acid Nutrition 0.000 claims description 2
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 abstract description 13
- 239000000126 substance Substances 0.000 abstract description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 4
- 238000004880 explosion Methods 0.000 abstract description 3
- 230000000638 stimulation Effects 0.000 abstract description 3
- 238000007865 diluting Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 7
- 229920000742 Cotton Polymers 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 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
- 230000008033 biological extinction Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000492 nasalseptum Anatomy 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 239000001476 sodium potassium tartrate Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention provides a method for measuring the phosphorus content in high-carbon ferrochrome, which belongs to the technical field of metallurgical chemical analysis and comprises the following steps: taking a quantitative high-carbon ferrochrome sample, and adding a fluxing agent consisting of boric acid and anhydrous sodium carbonate for melting; dissolving the frit with a nitric acid solution, and taking the frit as mother liquor after constant volume; taking a quantitative mother liquor, respectively adding a bismuth nitrate solution, an ammonium molybdate-potassium sodium tartrate mixed solution and an ascorbic acid solution into the mother liquor until color development is realized, and fixing the volume again; and (3) coating the solution with constant volume on a spectrophotometer, measuring absorbance, and measuring the phosphorus content according to the relation between the absorbance and the phosphorus content. According to the method for determining the phosphorus content in the high-carbon ferrochrome, the mixed fluxing agent consisting of the boric acid and the anhydrous sodium carbonate replaces a sodium peroxide fluxing agent in the prior art, so that dust stimulation and burning damage caused by the use of the sodium peroxide fluxing agent are avoided, combustion and explosion hidden dangers caused by the use of the sodium peroxide fluxing agent are also avoided, and the safety of determining the phosphorus content in the high-carbon ferrochrome is ensured.
Description
Technical Field
The invention belongs to the technical field of metallurgical chemical analysis, and particularly relates to a method for measuring the content of phosphorus in high-carbon ferrochrome.
Background
The high-carbon ferrochrome is an important alloy additive in a steelmaking process, and the accurate determination of the content of phosphorus in the high-carbon ferrochrome plays an important role in controlling the components of molten steel. At present, the phosphorus content in high-carbon ferrochrome is chemically analyzed, a sodium peroxide melting sample is used, sodium peroxide dust stimulates eyes and respiratory tracts to corrode nasal septum, skin can be burnt due to direct contact, and meanwhile, the sodium peroxide melting sample has certain danger, forms an explosive mixture with combustible substances, organic substances or easily-oxidized substances, can be burnt or exploded due to a small amount of contact water, can be decomposed and release oxygen to support combustion when meeting moisture and acids, can explode when being heated rapidly, and has strong corrosivity.
Disclosure of Invention
The invention aims to provide a method for measuring the phosphorus content in high-carbon ferrochrome, and aims to solve the technical problem that chemical analysis on the phosphorus content in the high-carbon ferrochrome has high risk by using sodium peroxide as a melting agent.
In order to achieve the purpose, the invention adopts the technical scheme that: the method for measuring the phosphorus content in the high-carbon ferrochrome comprises the following steps: taking a quantitative high-carbon ferrochrome sample, and adding a fluxing agent consisting of boric acid and anhydrous sodium carbonate for melting; dissolving the frit with a nitric acid solution, and taking the frit as mother liquor after constant volume; taking a quantitative mother liquor, respectively adding a bismuth nitrate solution, an ammonium molybdate-potassium sodium tartrate mixed solution and an ascorbic acid solution into the mother liquor until color development is realized, and fixing the volume again; and (3) coating the solution with constant volume on a spectrophotometer, measuring absorbance, and measuring the phosphorus content according to the relation between the absorbance and the phosphorus content.
As another embodiment of the present application, in the flux, the ratio of the boric acid to the anhydrous sodium carbonate is 1: 3.
as another example of the present application, the nitric acid solution, in which the ratio of nitric acid to solvent is 1:5, converts the phosphorus in the frit to orthophosphoric acid.
As another embodiment of the present application, in the melting process, 0.200g of the high-carbon ferrochrome sample is taken, and the amount of the flux is 2 g.
As another embodiment of the application, in the melting process, the high-carbon ferrochrome sample and the fluxing agent are placed in a muffle furnace at 900-950 ℃ for heating for 10 minutes.
As another example of this application, the ratio of the mother liquor, the bismuth nitrate solution, the ammonium molybdate-potassium sodium tartrate solution, and the ascorbic acid solution is 25:5:10:10 before volume fixing is performed again.
As another embodiment of the present invention, when the frit is dissolved in the nitric acid solution, the frit is placed in a container containing 70ml of the nitric acid solution, heated to dissolve the frit, filtered into an empty container, and added with water to a volume of 250 ml.
As another example herein, the solvent of the ascorbic acid solution is ethanol.
As another example of the present application, 2g of ascorbic acid in the ascorbic acid solution was dissolved in 100ml of ethanol solution.
As another example of the present application, a 3% ammonium molybdate solution is mixed with a 5% potassium sodium tartrate solution in equal volumes in the ammonium molybdate-potassium sodium tartrate solution.
The method for determining the phosphorus content in the high-carbon ferrochrome has the beneficial effects that: compared with the prior art, the method for determining the phosphorus content in the high-carbon ferrochrome uses the mixed fluxing agent consisting of the boric acid and the anhydrous sodium carbonate to replace the sodium peroxide fluxing agent in the prior art, thereby avoiding dust stimulation and burning damage caused by using the sodium peroxide fluxing agent, avoiding the hidden danger of combustion and explosion caused by using the sodium peroxide fluxing agent, and ensuring the safety of determining the phosphorus content in the high-carbon ferrochrome.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The method for determining the phosphorus content in the high-carbon ferrochrome provided by the invention is now explained. The method for measuring the phosphorus content in the high-carbon ferrochrome comprises the following steps: taking a quantitative high-carbon ferrochrome sample, and adding a fluxing agent consisting of boric acid and anhydrous sodium carbonate for melting; dissolving the frit with a nitric acid solution, and taking the frit as mother liquor after constant volume; taking a quantitative mother liquor, respectively adding a bismuth nitrate solution, an ammonium molybdate-potassium sodium tartrate mixed solution and an ascorbic acid solution into the mother liquor until color development is realized, and fixing the volume again; and (3) coating the solution with constant volume on a spectrophotometer, measuring absorbance, and measuring the phosphorus content according to the relation between the absorbance and the phosphorus content.
Compared with the prior art, the method for determining the phosphorus content in the high-carbon ferrochrome provided by the invention has the advantages that the mixed fluxing agent consisting of boric acid and anhydrous sodium carbonate is used for replacing a sodium peroxide fluxing agent in the prior art, so that dust stimulation and burning damage caused by using the sodium peroxide fluxing agent are avoided, combustion and explosion hidden dangers caused by using the sodium peroxide fluxing agent are also avoided, and the safety for determining the phosphorus content in the high-carbon ferrochrome is ensured.
The specific implementation mode is as follows:
1. experimental methods
1.1 Main instruments and reagents
1.1.1 high temperature muffle furnace
1.1.2 parts per million balance
1.1.3 nitric acid (nitric acid to water ratio 1:5)
1.1.4 bismuth nitrate: 5g of bismuth nitrate is weighed and dissolved in 1L of boiled 1mol/L nitric acid solution.
1.1.5 ammonium molybdate-sodium potassium tartrate solution: the 3% ammonium molybdate solution and the 5% potassium sodium tartrate solution are mixed in equal volume and are mixed when in use.
1.1.6 ascorbic acid-ethanol solution: 2g of ascorbic acid is weighed and dissolved in 100ml of ethanol solution (the ratio of the ascorbic acid to the ethanol is 1:9), and the ascorbic acid is prepared in situ.
1.2. Experimental methods
Weighing 0.2000g of sample in a paper tube filled with 2g of boric acid and anhydrous sodium carbonate mixed flux, uniformly stirring, wrapping, putting into a graphite crucible, and melting for 10 minutes in a muffle furnace at 900-950 ℃. Taking out, cooling, placing into 250ml beaker containing 70ml (the ratio of nitric acid to water is 1:5) nitric acid, heating and dissolving on electric hot plate, filtering with absorbent cotton filter funnel in 250ml volumetric flask after the sample is dissolved, diluting with water to scale, and shaking up.
And (3) sucking 25ml of mother liquor into a 50ml volumetric flask, adding 5ml of bismuth nitrate solution, 10ml of ammonium molybdate-potassium sodium tartrate solution and 10ml of ascorbic acid-ethanol solution until color is developed, diluting with water until scales are uniformly shaken, and measuring absorbance on a spectrophotometer at 680nm in a 3 cm cuvette by taking water as reference. And (5) converting the same variety of standard samples with similar contents to measure the percentage content of phosphorus.
1.3, calculating
P% (% standard/standard E1) × specimen E2 × 100
In the formula: reference E1-indicating the extinction value of the sample
Percent of standard sample-percentage content of standard sample
Sample E2-extinction of sample
2. Example of the implementation
Example 1
Weighing 0.2000g of high-carbon ferrochromium sample A in a paper tube filled with 2g of boric acid and anhydrous sodium carbonate mixed flux, uniformly stirring, wrapping, putting into a graphite crucible, and melting in a muffle furnace at 900-950 ℃ for 10 minutes. Taking out, cooling, placing into 250ml beaker containing 70ml (the ratio of nitric acid to water is 1:5) nitric acid, heating and dissolving on electric hot plate, filtering with absorbent cotton filter funnel in 250ml volumetric flask after the sample is dissolved, diluting with water to scale, and shaking up.
And (3) sucking 25ml of mother liquor into a 50ml volumetric flask, adding 5ml of bismuth nitrate solution, 10ml of ammonium molybdate-potassium sodium tartrate solution and 10ml of ascorbic acid-ethanol solution until color is developed, diluting with water until scales are uniformly shaken, and measuring absorbance on a spectrophotometer at 680nm in a 3 cm cuvette by taking water as reference. And (5) converting the same variety of standard samples with similar contents to measure the percentage content of phosphorus.
Example 2
0.2001g of high-carbon ferrochromium sample B is weighed and put into a paper tube containing 2g of boric acid and anhydrous sodium carbonate mixed flux, stirred evenly, wrapped and put into a graphite crucible to be melted for 10 minutes in a muffle furnace at 900-950 ℃. Taking out, cooling, placing into 250ml beaker containing 70ml (the ratio of nitric acid to water is 1:5) nitric acid, heating and dissolving on electric hot plate, filtering with absorbent cotton filter funnel in 250ml volumetric flask after the sample is dissolved, diluting with water to scale, and shaking up.
And (3) sucking 25ml of mother liquor into a 50ml volumetric flask, adding 5ml of bismuth nitrate solution, 10ml of ammonium molybdate-potassium sodium tartrate solution and 10ml of ascorbic acid-ethanol solution until color is developed, diluting with water until scales are uniformly shaken, and measuring absorbance on a spectrophotometer at 680nm in a 3 cm cuvette by taking water as reference. And (5) converting the same variety of standard samples with similar contents to measure the percentage content of phosphorus.
Example 3
0.1998g of high-carbon ferrochromium sample C is weighed and put into a paper tube containing 2g of boric acid and anhydrous sodium carbonate mixed flux, stirred evenly, wrapped, put into a graphite crucible and melted for 10 minutes in a muffle furnace at 900-950 ℃. Taking out, cooling, placing into 250ml beaker containing 70ml (the ratio of nitric acid to water is 1:5) nitric acid, heating and dissolving on electric hot plate, filtering with absorbent cotton filter funnel in 250ml volumetric flask after the sample is dissolved, diluting with water to scale, and shaking up.
And (3) sucking 25ml of mother liquor into a 50ml volumetric flask, adding 5ml of bismuth nitrate solution, 10ml of ammonium molybdate-potassium sodium tartrate solution and 10ml of ascorbic acid-ethanol solution until color is developed, diluting with water until scales are uniformly shaken, and measuring absorbance on a spectrophotometer at 680nm in a 3 cm cuvette by taking water as reference. And (5) converting the same variety of standard samples with similar contents to measure the percentage content of phosphorus.
Example 4
0.2001g of high-carbon ferrochromium sample D is weighed and put into a paper tube containing 2g of boric acid and anhydrous sodium carbonate mixed flux, stirred evenly, wrapped and put into a graphite crucible to be melted for 10 minutes in a muffle furnace at 900-950 ℃. Taking out, cooling, placing into 250ml beaker containing 70ml (the ratio of nitric acid to water is 1:5) nitric acid, heating and dissolving on electric hot plate, filtering with absorbent cotton filter funnel in 250ml volumetric flask after the sample is dissolved, diluting with water to scale, and shaking up.
And (3) sucking 25ml of mother liquor into a 50ml volumetric flask, adding 5ml of bismuth nitrate solution, 10ml of ammonium molybdate-potassium sodium tartrate solution and 10ml of ascorbic acid-ethanol solution until color is developed, diluting with water until scales are uniformly shaken, and measuring absorbance on a spectrophotometer at 680nm in a 3 cm cuvette by taking water as reference. And (5) converting the same variety of standard samples with similar contents to measure the percentage content of phosphorus.
Example 5
0.1999g of high-carbon ferrochromium sample E is weighed and put into a paper tube containing 2g of boric acid and anhydrous sodium carbonate mixed flux, stirred evenly, wrapped and put into a graphite crucible to be melted for 10 minutes in a muffle furnace at 900-950 ℃. Taking out, cooling, placing into 250ml beaker containing 70ml (the ratio of nitric acid to water is 1:5) nitric acid, heating and dissolving on electric hot plate, filtering with absorbent cotton filter funnel in 250ml volumetric flask after the sample is dissolved, diluting with water to scale, and shaking up.
And (3) sucking 25ml of mother liquor into a 50ml volumetric flask, adding 5ml of bismuth nitrate solution, 10ml of ammonium molybdate-potassium sodium tartrate solution and 10ml of ascorbic acid-ethanol solution until color is developed, diluting with water until scales are uniformly shaken, and measuring absorbance on a spectrophotometer at 680nm in a 3 cm cuvette by taking water as reference. And (5) converting the same variety of standard samples with similar contents to measure the percentage content of phosphorus.
In the above embodiments 1 to 5, each embodiment performs four parallel experiments, the specific operation method and each experimental parameter are the same in the same embodiment, and the experimental data of each group is introduced according to the calculation formula to obtain the detection result of each sample group, and the specific experimental data and the result are shown in table 1.
TABLE 1 EXAMPLES 1-5 Experimental data and analytical results
TABLE 2 allowable error range of phosphorus content
| P content (omega%) | Tolerance error (omega%) |
| ≤0.05 | 0.005 |
| ＞0.05—0.10 | 0.01 |
According to the analysis results in the table, the phosphorus content in the high-carbon ferrochrome is measured by the scheme of the application, the stability is good, and the measurement results are within the allowable error range and meet the analysis requirements.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The method for measuring the phosphorus content in the high-carbon ferrochrome is characterized by comprising the following steps of: taking a quantitative high-carbon ferrochrome sample, and adding a fluxing agent consisting of boric acid and anhydrous sodium carbonate for melting; dissolving the frit with a nitric acid solution, and taking the frit as mother liquor after constant volume; taking a quantitative mother liquor, respectively adding a bismuth nitrate solution, an ammonium molybdate-potassium sodium tartrate mixed solution and an ascorbic acid solution into the mother liquor until color development is realized, and fixing the volume again; and (3) coating the solution with constant volume on a spectrophotometer, measuring absorbance, and measuring the phosphorus content according to the relation between the absorbance and the phosphorus content.
2. The method of claim 1, wherein the ratio of boric acid to anhydrous sodium carbonate in the flux is 1: 3.
3. the method of claim 1, wherein the nitric acid solution has a nitric acid to solvent ratio of 1:5 to convert phosphorus in the frit to orthophosphoric acid.
4. The method for determining the phosphorus content in high-carbon ferrochrome according to claim 1, wherein 0.200g of the high-carbon ferrochrome sample is taken during the melting process, and the amount of the flux is 2 g.
5. The method for determining the phosphorus content in high-carbon ferrochrome as claimed in claim 1, wherein in the melting process, the high-carbon ferrochrome sample and the fluxing agent are heated in a muffle furnace at 900-950 ℃ for 10 minutes.
6. The method for determining the phosphorus content in high-carbon ferrochromium according to any one of claims 1 to 5, wherein the ratio of the mother liquor, the bismuth nitrate solution, the ammonium molybdate-potassium sodium tartrate solution and the ascorbic acid solution is 25:5:10:10 before volume fixing is carried out again.
7. The method according to claim 1, wherein when the clinker is dissolved in the nitric acid solution, the clinker is placed in a container filled with 70ml of the nitric acid solution, heated and dissolved, filtered to an empty container, and added with water to reach 250 ml.
8. The method for determining the phosphorus content in high carbon ferrochrome according to claim 1, wherein the solvent of the ascorbic acid solution is ethanol.
9. The method for determining the phosphorus content in high-carbon ferrochrome according to claim 1, wherein 2g of ascorbic acid in the ascorbic acid solution is dissolved in 100ml of ethanol solution.
10. The method of claim 1, wherein a 3% ammonium molybdate solution is mixed with a 5% potassium sodium tartrate solution in equal volumes.
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