GB/T 10574.11-2017: Translated English of Chinese Standard. (GBT 10574.11-2017, GB/T10574.11-2017, GBT10574.11-2017): Methods for Chemical Analysis of Tin-Lead Solders - Part 11: Determination of Phosphorus Content - Crystal Violet Phosphorus- Vanadium-Molybdenum Heteropoly Acid Spectrophotometry
https://www.chinesestandard.net, 2018 M03 30 - 10 pages
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.
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100mL volumetric flask 100µg of phosphorus 10mL of sulfuric 14mL of ammonium 250mL beaker 4.2 Hydrochloric 4.5 Sulfuric acid 4.7 P-nitrophenol 1g/L 40g of ammonium 5.00mL of phosphorus 56.0mL of sulfuric 5mL of hydrochloric acid-hydrobromic acid 4.2 add 10mL Add water Ammonium metavanadate solution ammonium molybdate NH4)6Mo7O24•4H2O,GR];dissolve Ammonium molybdate solution Analytical Results contains 100µg cool Crystal violet solution curve cuvette dilute with water evaporate till sulfuric filter paper hydrochloric acid 4.1 Hydrochloric acid-hydrobromic acid linear interpolation mix evenly mix the sub-boiling Molybdenum-ammonium vanadate mixture Phosphorus mass fraction Phosphorus standard solution Phosphorus standard stock polyethylene bottle Polyvinyl alcohol potassium dihydrogen phosphate quick filter paper repeatability limit reproducibility limit scale sodium chloride Sodium hydroxide Sodium hydroxide solution solution contains 1µg spectrophotometer standard stock solution sulfuric acid 4.4 sulfuric acid smokes Sulfuric acid solution test materials 6.1 Test Materials Quantity test results till sulfuric acid transfer into 1000mL violet solution 0.5g/L water to 500mL