Skip to product information
1 of 5

PayPal, credit cards. Download editable-PDF & invoice in 1 second!

GB/T 10574.11-2017 English PDF (GBT10574.11-2017)

GB/T 10574.11-2017 English PDF (GBT10574.11-2017)

Regular price $85.00 USD
Regular price Sale price $85.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: In 1-minute, 24-hr self-service. Click here GB/T 10574.11-2017 to get it for Purchase Approval, Bank TT...

GB/T 10574.11-2017: Methods for chemical analysis of tin-lead solders -- Part 11: Determination of phosphorus content -- Crystal violet phosphorus-vanadium-molybdenum heteropoly acid spectrophotometry

This Part of GB/T 10574 specifies the determination of phosphorus content in the tin-lead solders. This Part is applicable to the determination of phosphorus content in the tin-lead solders. The measurement range is 0.0005% ~ 0.0100%. This Part belongs to the arbitration analysis method.
GB/T 10574.11-2017
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.120.60
H 13
Replacing GB/T 10574.11-2003
Methods for Chemical Analysis of Tin-Lead Solders ?€? Part 11.
Determination of Phosphorus Content ?€? Crystal Violet
Phosphorus-Vanadium-Molybdenum Heteropoly Acid
Spectrophotometry
ISSUED ON. OCTOBER 14, 2017
IMPLEMENTED ON. MAY 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword . 3
1 Scope .. 5
2 Normative References . 5
3 Method Summary .. 5
4 Reagents . 6
5 Specimen .. 7
6 Analytical Procedures .. 7
7 Calculation of Analytical Results .. 8
8 Precision . 9
9 Test Report .. 9
Foreword
GB/T 10574 Methods for Chemical Analysis of Tin-Lead Solders can be divided into the following 14 parts.
--- Part 1. Determination of Tin Content ?€? Potassium Iodate Titrimetric Method; --- Part 2. Determination of Antimony Content - Malachite Green
Spectrophotometric Method and Potassium Bromate Titration;
--- Part 3. Determination of Bismuth ?€? Flame Atomic Absorption spectrometry; --- Part 4. Determination of Iron Content - 1,10-Phenanthroline Spectrophotometry; --- Part 5. Determination of Arsenic Content ?€? Arseno-Antimono-Molybdenum Blue Spectrophotometry;
--- Part 6. Determination of Copper Content ?€? Flame Atomic Absorption
spectrometry;
--- Part 7. Determination of Silver Content ?€? Flame Atomic Absorption Spectrometry and Potassium Thiocyanate Potentiometric Titration;
--- Part 8. Determination of Zinc Content ?€? Flame Atomic Absorption Spectrometry; --- Part 9. Determination of Aluminum Content ?€? Electrothermal Atomic Absorption Spectrometry;
--- Part 10. Determination of Cadmium Content ?€? Flame Atomic Absorption Spectrometry and Na2EDTA Titration;
--- Part 11. Determination of Phosphorus Content ?€? Crystal Violet Phosphorus- Vanadium-Molybdenum Heteropoly Acid Spectrophotometry;
--- Part 12. Determination of Sulfur Content - High-Frequency Combustion Infrared Absorption Spectrometry;
--- Part 13. Determination of Antimony, Bismuth, Iron, Arsenic, Copper, Silver, Zinc, Aluminum, Cadmium, Phosphorous and Gold Contents - Inductively Coupled
Plasma Atomic Emission Spectrometric Method;
--- Part 14. Determination of Tin, Lead, Antimony, Bismuth, Silver, Copper, Zinc, Cadmium and Arsenic Content - Optical Emission Spectrometry.
This Part belongs to Part 11 of GB/T 10574.
This Part was drafted as per the rules specified in GB/T 1.1-2009.
Methods for Chemical Analysis of Tin-Lead Solders ?€? Part 11.
Determination of Phosphorus Content ?€? Crystal Violet
Phosphorus-Vanadium-Molybdenum Heteropoly Acid
Spectrophotometry
1 Scope
This Part of GB/T 10574 specifies the determination of phosphorus content in the tin- lead solders.
This Part is applicable to the determination of phosphorus content in the tin-lead solders. The measurement range is 0.0005% ~ 0.0100%.
This Part belongs to the arbitration analysis method.
2 Normative References
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.
GB/T 8012 Casting Tin-Lead Solders
3 Method Summary
The test materials shall use nitric acid and hydrochloric acid to decompose; then in the sulfuric acid medium, use hydrochloric acid-hydrobromic acid to volatilize and remove the tin, arsenic and antimony, the lead is precipitated as lead sulfate. Take the test solution separately and adjust the acidity, then in the presence of polyvinyl alcohol, phosphorus-vanadium-molybdenum heteropoly acid and crystal violet form a purple- red ion complex; measure its absorbance at a wavelength of 545nm of
spectrophotometer.
the operation for twice. The sulfuric acid continues to smoke till the residual sulfuric acid volume is 2mL~3mL; take off and cool off. Use small amount of water to wash the beaker wall, boil for 2min; cool off to the room temperature; use water to transfer into 50mL volumetric flask and dilute to the scale; mix evenly. Use a slow quantitative filter paper to dry filter in a 100mL beaker; discard the initial portion of the filtrate; respectively take 10.00mL of filtrate into 100mL volumetric flask.
6.4.3 Add one drop of p-nitrophenol solution (4.7); add 5.0mL of sodium hydroxide solution (4.6); use sulfuric acid (4.5) to adjust till the yellow color fades; add 10.0mL of sulfuric acid solution (4.5); dilute with water to about 60mL; mix evenly. Under shaking condition, slowly add 10mL of molybdenum-ammonium vanadate mixture (4.10); mix evenly, stand for 10min. Add 2.0mL of polyvinyl alcohol solution (4.11), mix evenly. Add 4.0mL of crystal violet solution (4.12); dilute with water to the scale; mix evenly. Place for 1h.
6.4.4 Transfer partial test solution into 1cm cuvette; take the blank test solution of the test materials as the reference; measure its absorbance at the wavelength of 545nm of the spectrophotometer. Find the corresponding amount of phosphorus from the working curve.
6.5 Drawing of working curve
6.5.1 Pipette 0mL, 1.00mL, 2.00mL, 4.00mL, 6.00mL, 8.00mL, 10.00mL of
phosphorus standard solution (4.14) into a group of 100mL volumetric flasks; dilute with water to about 20mL; add 1.2mL of sulfuric acid (4.4), the following procedures shall take as 6.4.3.
6.5.2 Under the same conditions of measuring the test materials, take reagent blank as the reference; measure the absorbance of serial standard solutions. Take phosphorus quantity as abscissa, absorbance as the ordinate, then draw the working curve.
7 Calculation of Analytical Results
The phosphorus quantity shall be calculated by phosphorus mass fraction wp, the value shall be expressed in %; calculate by Formula (1).
Where.
m1 ?€? mass of phosphorus checked from the working curve, in ??g;
V ?€? total volume of test solution, in mL;

View full details