CN102507487B - Method for analyzing and measuring silver content in chromium bronze alloy - Google Patents
Method for analyzing and measuring silver content in chromium bronze alloy Download PDFInfo
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Abstract
The invention discloses a method for analyzing and measuring silver content in a chromium bronze alloy. The method comprises the following steps of: preparing a copper solution, a chromium solution, a rare earth solution and a silver standard working solution respectively, preparing the silver standard working solution into a series standard solution, drawing a working curve of the series standard solution, dissolving a chromium bronze alloy sample, and thus obtaining a solution in which the sample is dissolved; measuring absorbance of the solution in which the sample is dissolved; and calculating the silver content in the chromium bronze sample. By the analysis and measurement method, the silver content in the chromium bronze alloy can be accurately measured, and a gap that a method for measuring the silver content in the chromium bronze alloy formed by adding silver and rare-earth cerium into chromium bronze does not exist in the prior art is filled; and the method is easy to operate and high in accuracy. Moreover, the problem of difficulty in elemental analysis in the product development process is solved, and advantages are created for product marketization and large-scale production.
Description
Technical field
The invention belongs to the chemical detection technique field, relate to the chemical analysis method that in a kind of chromium-bronze alloy, constituent content is measured, be specifically related to the analysis determining method of silver content in a kind of chromium-bronze.
Background technology
Add silver and cerium and consist of a kind of chromium-bronze alloy mainly for the production of high speed railway osculatory newly in chromium-bronze, contain 0.40～1.10% Cr, 0.05～0.10% Ce, the Fe less than 0.1%, the Ni less than 0.05%, 0.05～0.20% Ag in this chromium-bronze alloy.The high characteristic of fusing point (1857 ℃) that has high strength, high rigidity, wear-resisting and chromium due to this chromium-bronze alloy, when adopting existing chemical analysis method to measure the content of silver element wherein, the single acid that in this analytical approach, regulation is used is difficult to thorough dissolve chromium bell metal sample, can not satisfy the mensuration of silver content in this chromium-bronze alloy.
Summary of the invention
In order to overcome above-mentioned problems of the prior art, the purpose of this invention is to provide the analysis determining method of silver content in a kind of chromium-bronze alloy, can dissolve this chromium-bronze alloy sample fully, wherein silver content is carried out Accurate Determining.
For achieving the above object, the technical solution adopted in the present invention is, the analysis determining method of silver content in a kind of chromium-bronze alloy is prepared respectively the accurate working solution of copper solution, chromium solution, earth solution and silver label, and the accurate working solution of this silver label is made series standard solution, draw the working curve of this series standard solution, dissolve chromium bell metal sample obtains dissolving in the solution of sample, measures the absorbance that this dissolves in the solution of sample, then, calculate silver content in the chromium-bronze sample.
Said method specifically carries out according to the following steps:
Step 1: take the percentage by weight of silver less than 0.0010% fine copper 10.0000g, be placed in the 500mL beaker, add 50m L salpeter solution (1+3), the heating for dissolving fine copper, boil, cooling, move in the 200mL volumetric flask, be diluted with water to scale, mixing obtains copper solution;
Take the potassium dichromate standard reagent of 0.5656g drying, be placed in the 250mL beaker, water dissolving, adding 5mL density is the sulfuric acid of 1.84g/mL, cooling after, dropping concentration is 30% superoxol, be placed to yellow the disappearance, move in the 1000mL volumetric flask, water is rare to scale, mixing obtains chromium solution;
Take ceria 0.1228g, be placed in the 300mL beaker, then adding successively 10mL water, 5mL concentration is that 30% superoxol and 15mL density are 1.84g/mL sulfuric acid, the heating for dissolving ceria moves in the 1000mL volumetric flask, is diluted with water to scale, mixing obtains earth solution;
Take the 1.0000g fine silver, be placed in the 200mL beaker, add 10mL salpeter solution (1+3), the heating for dissolving fine silver boils, cooling after, move in the 1000mL volumetric flask, water is rare to scale, mixing obtains the accurate storing solution of silver label; The accurate storing solution of this silver label of 50.00mL is moved in the 1000mL volumetric flask, and water is rare to scale, and mixing obtains the accurate working solution of silver label;
Step 2: get six 100mL volumetric flasks, the accurate working solution of silver label that adds respectively 0mL, 1.0mL, 2.0mL, 3.0mL, 4.0mL, 5.0mL step 1 to make in each volumetric flask, the earth solution 5mL that adds again copper solution 2mL that 2mL salpeter solution (1+3), step 1 make, chromium solution 5mL that step 1 makes and step 1 to make in each volumetric flask, be diluted with water to scale, mixing, being made into mass concentration is 0 μ g/mL, 0.5 μ g/mL, 1.0 μ g/mL, 1.5 μ g/mL, 2.0 μ g/mL, 2.5 μ g/mL series standard solution;
Step 3: adopt atomic absorption instrument, in the step 2 mass concentration as the standard solution of 0 μ g/mL as reference, the silver content in all the other five kinds of standard solution in determination step 2 respectively; And according to the silver content in these five kinds of standard solution that record, adopt existing method to draw the working curve of this series standard solution;
Step 4: the chromium-bronze alloy sample that takes 0.1000g silver content to be determined, be placed in the 200mL beaker, first add 8mL salpeter solution (1+3), adding 1mL density is the hydrochloric acid of 1.19 g/mL again, the heating for dissolving sample, add again the perchloric acid that 2mL density is 1.68 g/mL, continue to be heated to emit white cigarette, cooling, add 10mL water, add into 2mL salpeter solution (1+3) again, move in the 100mL volumetric flask, water is rare to scale, mixing, adopt atomic absorption instrument, reagent blank is reference, measures the absorbance of the solution that dissolves in sample;
Step 5: according to following formula, calculation procedure 4 is got the silver content in the chromium-bronze sample:
In formula,
CThe concentration of this solution that the absorbance of the solution that dissolves in sample that expression obtains according to step 4 checks on the working curve that step 3 obtains, the μ g/mL of unit;
VThe dilution volume of expression chromium-bronze sample solution, Unit/mL;
GThe weight of the chromium-bronze alloy sample that expression takes, the g of unit.
Analysis determining method of the present invention is with multiple sour dissolve chromium bell metal sample, and wherein silver content is carried out Accurate Determining, filled up and do not measured the blank that adds the method for silver content in the chromium-bronze alloy that forms after silver and cerium in chromium-bronze in the prior art; And easy operating, result precision is high.Also solved simultaneously the difficult problem of ultimate analysis in the product development process, for product moves towards market and advantage has been created in large-scale production.
Description of drawings
Accompanying drawing is the working curve diagram of the series standard solution drawn in the embodiment of the present invention.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
due to the chromium that contains percentage by weight 0.40～1.10% (Cr), the cerium of percentage by weight 0.05～0.10% (Ce), percentage by weight is less than 0.1% iron (Fe), percentage by weight is less than 0.05% nickel (Ni), the chromium-bronze alloy of the silver of percentage by weight 0.05～0.20% (Ag) has high strength, high rigidity, wear-resisting and high fusing point, existing chemical analysis method can't dissolve this chromium-bronze alloy sample fully, thereby the silver content in can not this chromium-bronze alloy of Accurate Determining, but in actual production process, silver content in necessary this chromium-bronze alloy of Accurate Determining, and control silver content 0.05～0.20%, could satisfy the requirement of chromium-bronze alloy mechanical performance.In order to overcome above-mentioned problems of the prior art, satisfy the mechanical property of chromium-bronze alloy, the invention provides a kind of effectively dissolve chromium bell metal sample, and the silver content in sample is carried out the method for Accurate Determining, satisfied reliability and the accuracy of determination of silver content in the chromium-bronze alloy.The method is specifically carried out according to the following steps:
Step 1: take the 10.0000g fine copper, in this fine copper, the percentage by weight of silver less than 0.0010%, is placed in the 500mL beaker, add 50mL salpeter solution (1+3), heating makes the fine copper dissolving, boils, and eliminates nitrogen oxides in solution, cooling, move in the 200mL volumetric flask, water is rare to scale, mixing, obtain copper solution, contain 50mg copper in every milliliter of this copper solution;
Take the potassium dichromate standard reagent of 0.5656g drying, be placed in the 250mL beaker, the water dissolving, adding 5mL density is the sulfuric acid of 1.84g/mL, after cooling, dropping concentration is 30% superoxol, is placed to yellow the disappearance, moves in the 1000mL volumetric flask, water is rare to scale, mixing obtains chromium solution, contains 200 μ g chromium in every milliliter of this chromium solution;
Take ceria 0.1228g, be placed in the 300mL beaker, then adding successively 10mL water, 5mL concentration is that 30% superoxol and 15mL density are 1.84g/mL sulfuric acid, heating makes the ceria dissolving, and Mao Baiyan moves in the 1000mL volumetric flask, be diluted with water to scale, mixing obtains earth solution, and the used time is diluted to the earth solution of 20ug/mL;
Take the 1.0000g fine silver, be placed in the 200mL beaker, add 10mL salpeter solution (1+3), heating makes the fine silver dissolving, boil, eliminate nitrogen oxides in solution, cooling after, move in the 1000mL volumetric flask, water is rare to scale, mixing obtains the accurate storing solution of silver label, contains 1mg silver in every milliliter of accurate storing solution of this silver label; Divide and get the accurate storing solution of this silver label of 50.00mL, move in the 1000mL volumetric flask, water is rare to scale, and mixing obtains the accurate working solution of silver label, contains 50 μ g silver in every milliliter of accurate working solution of silver label.
Step 2: get six 100mL volumetric flasks, the accurate working solution of silver label that adds respectively 0mL, 1.0mL, 2.0mL, 3.0mL, 4.0mL, 5.0mL step 1 to make in each volumetric flask, the earth solution 5mL that adds again copper solution 2mL that 2mL salpeter solution (1+3), step 1 make, chromium solution 5mL that step 1 makes and step 1 to make in each volumetric flask, be diluted with water to scale, mixing, being made into mass concentration is 0 μ g/mL, 0.5 μ g/mL, 1.0 μ g/mL, 1.5 μ g/mL, 2.0 μ g/mL, 2.5 μ g/mL series standard solution;
Step 3: adopt TAS-990 type atomic absorption instrument (Beijing general analyse general manufacturing) at wavelength 328.1nm place, mass concentration as the standard solution of 0 μ g/mL as reference, is distinguished the silver content in all the other five kinds of standard solution in determination step 2 in the step 2; And according to the silver content in these five kinds of standard solution that record, adopt existing method to draw the working curve of this series standard solution;
Adopt six equal difference concentration standard solution, test by existing method, record the linearity of these five equal difference concentration standard solution working curves as shown in table 1.
The linearity of six equal difference concentration standard solution working curves of table 1
| Add silver amount (ug) | 0 | 50 | 100 | 150 | 200 | 250 |
| Absorbance (A) | 0.001 | 0.101 | 0.200 | 0.301 | 0.401 | 0.500 |
Table 1 demonstration, in the standard solution of six equal difference concentration, the difference of two maximum concentration standard solution absorbances is 1.02 with the ratio of the difference of minimum standard solution absorbance and zero-dose solution absorbance, this difference is near 1; The linear of five standard solution punctuates that add the second goldstandard solution is described.
step 4: the chromium-bronze alloy sample that takes 0.1000g silver content to be determined, be placed in the 200mL beaker, first add 8mL salpeter solution (1+3), adding 1mL density is the hydrochloric acid of 1.19 g/mL again, heating for dissolving sample (leave black residue in solution this moment), add again the perchloric acid that 2mL density is 1.68 g/mL, continue to be heated to emit white cigarette, cooling, add 10mL water, the sulfate that metallic element in the dissolve chromium bronze and sulfuric acid form, add again into 2mL salpeter solution (1+3), move in the 100mL volumetric flask, water is rare to scale, mixing, adopt TAS-990 type atomic absorption instrument (Beijing general analyse general), at wavelength 328.1nm place, reagent blank is reference, mensuration is dissolved in the absorbance of the solution of sample,
Step 5: according to following formula, calculation procedure 4 is got the silver content in the chromium-bronze sample:
In formula,
CThe concentration of this solution that the absorbance of the solution that dissolves in sample that expression obtains according to step 4 checks on the working curve that step 3 obtains, the μ g/mL of unit;
VThe dilution volume of expression chromium-bronze sample solution, Unit/mL;
GThe weight of the chromium-bronze alloy sample that expression takes, the g of unit.
The chromium-bronze alloy sample is after hydrochloric acid, nitric acid and high chloro acid dissolution, and in Atomic Absorption Spectrometer, wavelength 328.1nm measures the silver-colored absorbance of dissolving in sample solution in the place, calculates the content of silver according to its working curve.
Below carry out actual verification with regard to various reagent and consumption etc. in analytical approach of the present invention:
1) drafting of experimental technique: take 0.1000g chromium-bronze sample, be placed in the 200mL beaker, add the sour dissolved samples of experiment, cooling, add 10mL Water dissolve salt class, add 2mL salpeter solution (1+3), move in the 100mL volumetric flask, water is rare to scale, mixing.Measure the silver amount in TAS-990 type atomic absorption instrument (Beijing general analyse general) wavelength 328.1nm place.
2) selection of molten sample acid: take sample by the experimental technique of drafting, according to the product requirement of chromium-bronze alloy, by the preparation of the step 2 in the inventive method series standard solution, draw the working curve of this series standard solution; Dissolve respectively the chromium-bronze sample of identical weight with different acid, the dissolving that the sour dissolve chromium bronze of difference sample obtains is measured respectively.The data that obtain see Table 2.
The selection of the molten sample acid of table 2
A in table 2, B, C, D, E, six kinds of methods of processing sample of F, the sample liquid that obtains is muddy, and some appearance black residue are done filtration treatment, and determination of silver content is unstable, Lower result.G, two kinds of methods of processing sample of H, solution is limpid, and determination of silver content is stable, and result is satisfied.Therefore the inventive method is selected the molten sample of G method, namely use nitric acid, hydrochloric acid and high chloro acid dissolution's chromium-bronze sample.
3) determining of molten sample acid consumption: take the chromium-bronze sample that 0.1000g contains 0.10% silver medal, in the 200mL beaker, after adding 8mL salpeter solution (1+3), be that the hydrochloric acid of 1.19 g/mL and addition that density is the perchloric acid of 1.68 g/mL are tested to density respectively, data see Table 3.
Table 3 hydrochloric acid, perchloric acid consumption
Table 3 demonstration, the hydrochloric acid consumption is at 0.5～2mL, and the perchloric acid consumption does not all affect mensuration at 1～5mL.The inventive method is selected and is added 1 mL hydrochloric acid and 2 mL perchloric acid.
4) measure determining of acidity: take the chromium-bronze sample that six parts of 0.1000g contain 0.10% silver medal, after G method dissolution sample selected in the selection of molten sample acid, obtain six solution, add 0.5mL salpeter solution (1+3) in a solution, add 1.0mL salpeter solution (1+3) in second solution, add 2.0mL salpeter solution (1+3) in the 3rd solution, add 3.0mL salpeter solution (1+3) in the 4th solution, add 4.0mL salpeter solution (1+3) in the 5th solution, add 5.0mL salpeter solution (1+3) in the 6th solution, obtain six solution that dissolve in sample, after constant volume, respectively these six solution that dissolve in sample are measured, data see Table 4.
Nitric acid dosage when table 4 is measured
| Nitric acid (1+3)/mL | 0.5 | 1.0 | 2.0 | 3.0 | 4.0 | 5.0 |
| Determination of silver content value/% | 0.100 | 0.102 | 0.101 | 0.0994 | 0.0996 | 0.101 |
Data result in table 4 shows: adding 0.5～5mL salpeter solution (1+3) does not affect mensuration.Add 2mL salpeter solution (1+3) in this method.
5) interference experiment: pipette the accurate working solution of silver label that 2mL the inventive method step 2 makes in the 100mL volumetric flask, then add 2mL copper solution, 5mL chromium solution, 5mL cerium solution, 5mL ferrous solution, 5mL nickel solution and 2mL salpeter solution (1+3), water is diluted to scale, mixing.Measure the silver amount in TAS-990 type atomic absorption instrument (Beijing general analyse general) wavelength 328.1nm place, data see Table 5.
Table 5 element disturbs and integrated interference
| Coexistence elements and addition | Determination of silver content value (μ g) |
| 100mg/100mLCu | 100.2 |
| 0.1mg/100mLCe | 99.90 |
| 1mg/100mLCr | 100.3 |
| 0.1mg/100mLFe | 100.1 |
| 0.05mg/100mLNi | 99.95 |
| Contain 100mgCu, 0.1mgCe, 1mgCr, 0.1mgFe, 0.05mgNi in 100 mL solution to be measured | 100.1 |
The data result of table 5 shows: 100mg/100mLCu, 0.1mg/100mLCe, 1mg/100mLCr, 0.1mg/100mLFe, 0.05mg/100mLNi be interference measurement not.Illustrate in chromium-bronze that except silver element, the amount of other coexistence elements does not affect the accuracy of the mensuration of the silver amount of dissolving in sample solution by the method weighing of drafting.
6) Precision Experiment: measure by the step 4 in the inventive method and step 5 pair different samples, the results are shown in Table 6.
Table 6 Precision Experiment
Table 6 explanation: accuracy and the precision of the inventive method are high, and method is reliable, and the energy Accurate Determining dissolves in the silver amount in sample solution.
7) recovery experiment: take different samples, after adding the accurate solution of silver label, measure by the step 8 in the inventive method, the results are shown in Table 7.
Measurement result and recovery n=5 of silver amount in table 7 sample
Table 7 shows, the silver amount that adds by the method for drafting can quantitative recovery, is fit to the mensuration of silver amount in chromium-bronze.
Embodiment
Take the 10.0000g fine copper, in this fine copper, the percentage by weight of silver less than 0.0010%, is placed in the 500mL beaker, add 50mL salpeter solution (1+3), heating makes the fine copper dissolving, boils, and eliminates nitrogen oxides in solution, cooling, move in the 200mL volumetric flask, water is rare to scale, mixing, obtain copper solution, contain 50mg copper in every milliliter of this copper solution;
Take the potassium dichromate standard reagent of 0.5656g drying, be placed in the 250mL beaker, the water dissolving, adding 5mL density is the sulfuric acid of 1.84g/mL, after cooling, dropping concentration is 30% superoxol, is placed to yellow the disappearance, moves in the 1000mL volumetric flask, water is rare to scale, mixing obtains chromium solution, contains 200 μ g chromium in every milliliter of this chromium solution;
Take ceria 0.1228g, be placed in the 300mL beaker, then adding successively 10mL water, 5mL concentration is that 30% superoxol and 15mL density are 1.84g/mL sulfuric acid, heating makes the ceria dissolving, and Mao Baiyan moves in the 1000mL volumetric flask, be diluted with water to scale, mixing obtains earth solution, and the used time is diluted to the earth solution of 20ug/mL;
Take the 1.0000g fine silver, be placed in the 200mL beaker, add 10mL salpeter solution (1+3), heating makes the fine silver dissolving, boil, eliminate nitrogen oxides in solution, cooling after, move in the 1000mL volumetric flask, water is rare to scale, mixing obtains the accurate storing solution of silver label, contains 1mg silver in every milliliter of accurate storing solution of this silver label; Divide and get the accurate storing solution of this silver label of 50.00mL, move in the 1000mL volumetric flask, water is rare to scale, and mixing obtains the accurate working solution of silver label, contains 50 μ g silver in every milliliter of accurate working solution of silver label.
Get six 100mL volumetric flasks, the accurate working solution of the silver label that adds respectively 0mL, 1.0mL, 2.0mL, 3.0mL, 4.0mL, 5.0mL to make in each volumetric flask, the earth solution 5mL that all adds 2mL salpeter solution (1+3), the copper solution 2mL that makes, the chromium solution 5mL that makes in each volumetric flask and make, be diluted with water to scale, mixing, being made into mass concentration is 0 μ g/mL, 0.5 μ g/mL, 1.0 μ g/mL, 1.5 μ g/mL, 2.0 μ g/mL, 2.5 μ g/mL series standard solution;
Adopt the general TAS-990 type atomic absorption instrument of analysing general manufacturing in Beijing, at wavelength 328.1nm place, the standard solution take mass concentration as 0 μ g/mL is measured respectively the silver content in all the other five kinds of standard solution as reference; And according to the silver content in these five kinds of standard solution that record, adopt existing method to draw the working curve of this series standard solution as shown in drawings;
take the chromium-bronze alloy sample of 0.1000g silver content to be determined, be placed in the 200mL beaker, first add 8mL salpeter solution (1+3), adding 1mL density is the hydrochloric acid of 1.19 g/mL again, heating for dissolving sample (leave black residue in solution this moment), add again the perchloric acid that 2mL density is 1.68 g/mL, continue to be heated to emit white cigarette, cooling, add 10mL water, the sulfate that metallic element in the dissolve chromium bronze and sulfuric acid form, add again into 2mL salpeter solution (1+3), move in the 100mL volumetric flask, water is rare to scale, mixing, adopt TAS-990 type atomic absorption instrument (Beijing general analyse general), at wavelength 328.1nm place, reagent blank is reference, mensuration is dissolved in the absorbance of the solution of sample, check in the concentration of this solution on the working curve of drawing according to this absorbance, the dilution volume of chromium-bronze sample solution is 100mL, the weight of chromium-bronze alloy sample is 0.1000g, calculates the silver content in chromium-bronze sample to be measured.
Claims (3)
1. the analysis determining method of silver content in a chromium-bronze alloy, prepare respectively the accurate working solution of copper solution, chromium solution, earth solution and silver label, the accurate working solution of this silver label is made series standard solution, draw the working curve of this series standard solution, dissolve chromium bell metal sample, obtain dissolving in the solution of sample, measure the absorbance that this dissolves in the solution of sample, then, calculate the silver content in the chromium-bronze sample, it is characterized in that, the method is specifically carried out according to the following steps:
Step 1: take the percentage by weight of silver less than 0.0010% fine copper 10.0000g, be placed in the 500mL beaker, add 50m L salpeter solution (1+3), the heating for dissolving fine copper, boil, cooling, move in the 200mL volumetric flask, be diluted with water to scale, mixing obtains copper solution;
Take the potassium dichromate standard reagent of 0.5656g drying, be placed in the 250mL beaker, water dissolving, adding 5mL density is the sulfuric acid of 1.84g/mL, cooling after, dropping concentration is 30% superoxol, be placed to yellow the disappearance, move in the 1000mL volumetric flask, water is rare to scale, mixing obtains chromium solution;
Take ceria 0.1228g, be placed in the 300mL beaker, then adding successively 10mL water, 5mL concentration is that 30% superoxol and 15mL density are 1.84g/mL sulfuric acid, the heating for dissolving ceria moves in the 1000mL volumetric flask, is diluted with water to scale, mixing obtains earth solution;
Take the 1.0000g fine silver, be placed in the 200mL beaker, add 10mL salpeter solution (1+3), the heating for dissolving fine silver boils, cooling after, move in the 1000mL volumetric flask, water is rare to scale, mixing obtains the accurate storing solution of silver label; The accurate storing solution of this silver label of 50.00mL is moved in the 1000mL volumetric flask, and water is rare to scale, and mixing obtains the accurate working solution of silver label;
Step 2: get six 100mL volumetric flasks, the accurate working solution of silver label that adds respectively 0mL, 1.0mL, 2.0mL, 3.0mL, 4.0mL, 5.0mL step 1 to make in each volumetric flask, the earth solution 5mL that adds again copper solution 2mL that 2mL salpeter solution (1+3), step 1 make, chromium solution 5mL that step 1 makes and step 1 to make in each volumetric flask, be diluted with water to scale, mixing, being made into mass concentration is 0 μ g/mL, 0.5 μ g/mL, 1.0 μ g/mL, 1.5 μ g/mL, 2.0 μ g/mL, 2.5 μ g/mL series standard solution;
Step 3: adopt atomic absorption instrument, in the step 2 mass concentration as the standard solution of 0 μ g/mL as reference, the silver content in all the other five kinds of standard solution in determination step 2 respectively; And according to the silver content in these five kinds of standard solution that record, adopt existing method to draw the working curve of this series standard solution;
Step 4: the chromium-bronze alloy sample that takes 0.1000g silver content to be determined, be placed in the 200mL beaker, first add 8mL salpeter solution (1+3), adding 1mL density is the hydrochloric acid of 1.19 g/mL again, the heating for dissolving sample, add again the perchloric acid that 2mL density is 1.68 g/mL, continue to be heated to emit white cigarette, cooling, add 10mL water, add into 2mL salpeter solution (1+3) again, move in the 100mL volumetric flask, water is rare to scale, mixing, adopt atomic absorption instrument, reagent blank is reference, measures the absorbance of the solution that dissolves in sample;
Step 5: according to following formula, calculation procedure 4 is got the silver content in the chromium-bronze sample:
In formula,
CThe concentration of this solution that the absorbance of the solution that dissolves in sample that expression obtains according to step 4 checks on the working curve that step 3 obtains, the μ g/mL of unit;
VThe dilution volume of expression chromium-bronze sample solution, Unit/mL;
GThe weight of the chromium-bronze alloy sample that expression takes, the g of unit.
2. the analysis determining method of silver content in chromium-bronze alloy according to claim 1, is characterized in that, adopts TAS-990 type atomic absorption instrument in described step 3, at wavelength 328.1nm place, the silver content in bioassay standard solution.
3. the analysis determining method of silver content in chromium-bronze alloy according to claim 1, is characterized in that, adopts TAS-990 type atomic absorption instrument in described step 4, in wavelength 328.1nm place, the absorbance in bioassay standard solution.
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