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GB/T 38339-2019: Determination of phosphorus content in fluorescent brightener products
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 38339-2019 | English | 139 |
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Determination of phosphorus content in fluorescent brightener products
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GB/T 38339-2019
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Basic data | Standard ID | GB/T 38339-2019 (GB/T38339-2019) | | Description (Translated English) | Determination of phosphorus content in fluorescent brightener products | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G55 | | Classification of International Standard | 71.100.01; 87.060.10 | | Word Count Estimation | 7,761 | | Date of Issue | 2019-12-31 | | Date of Implementation | 2020-11-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 38339-2019: Determination of phosphorus content in fluorescent brightener products---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of phosphorus content in fluorescent brightener products
ICS 71.100.01; 87.060.10
G55
National Standards of People's Republic of China
Determination of phosphorus content in fluorescent brightener products
2019-12-31 release
2020-11-01 implementation
State Administration of Market Supervision
Published by the National Standardization Administration
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the China Petroleum and Chemical Industry Federation.
This standard is under the jurisdiction of the National Dye Standardization Technical Committee (SAC/TC134).
This standard was drafted by. Shenyang Xinji Chemical Co., Ltd., Shenzhen Standard Dyestuff Technology Co., Ltd., and Shenyang Shenhua Institute.
Co., Ltd., Shenyang Chemical Research Institute Co., Ltd., National Dye Directive Supervision and Inspection Center.
The main drafters of this standard. Wang Zhenyuan, Tong Weichang, Liang Peiji, Wang Yong, Xue Yan, Ji Lanqin, Gong Wei, Tan Cheng, Wang Bei, Yang Zhenmei.
Determination of phosphorus content in fluorescent brightener products
1 Scope
This standard specifies the phosphorus molybdenum blue method and phosphorus molybdenum yellow method for the determination of phosphorus content in fluorescent brightener products.
This standard applies to the determination of phosphorus content in fluorescent brightener products.
Phosphorus molybdenum yellow method is only applicable to the determination of phosphorous content above 500mg/kg in fluorescent brightener products.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 6682-2008 Analytical laboratory water specifications and test methods
3 Principle
The sample is decomposed to decompose organic matter, and the phosphorus is completely converted into orthophosphate. Under acidic conditions, the orthophosphate and ammonium molybdate generate heterogeneity.
acid. In the presence of antimony or bismuth, reduction with ascorbic acid to phosphorus antimony (bismuth) molybdenum blue; or in the presence of vanadium, formation of a stable yellow vanadium molybdenum phosphate
[(NH4) 3PO4NH4VO3 · 16MoO3]. It conforms to Beer's law in a certain concentration range.
4 Reagents or materials
Laboratory water should meet the requirements of Grade III water in GB/T 6682-2008. The reagents used in this standard are
Analysis of pure.
4.1 Nitric acid.
4.2 Perchloric acid.
4.3 Mixed acid. The volume ratio of perchloric acid to nitric acid is 1. 3.
4.4 Hydrochloric acid.
4.5 Hydrogen peroxide.
4.6 Sulfuric acid solution. The volume ratio of sulfuric acid to water is 1. 1.
4.7 Ammonium molybdate solution. Dissolve 13g of ammonium molybdate [(NH4) 6Mo7O24 · 4H2O] in 100mL of water and dissolve 0.35g of potassium antimony tartrate
[KSbC4H4O2 · 1/2H2O] in 100 mL of water. Add ammonium molybdate solution to 300mL sulfuric acid solution under continuous stirring
(4.6), then slowly add the antimony potassium tartrate solution and mix well.
4.8 Ammonium vanadyl molybdate coloration solution. Weigh 1.25g of ammonium metavanadate [H4NO3V], add.200mL of water to heat and dissolve, add 250mL after cooling
Nitric acid. Also weigh 25g of ammonium molybdate, add 400mL of water to heat and dissolve, and under cooling conditions, mix the two solutions and make up to volume
1000mL. Keep away from light and cannot be used if precipitation occurs.
4.9 Ascorbic acid solution (100g/L). Dissolve 10g ascorbic acid (C6H8O6) in 100mL water.
4.10 Phosphorus standard stock solution (50mg/L). Accurately weigh 0.2197g (accurate to 0.0002g) and dry it at 110 ℃ for 2h and dry it in a desiccator
After cooling for 30 min, potassium dihydrogen phosphate was dissolved in water and transferred to a 1000 mL volumetric flask.Add about 800 mL of water and 3 mL of nitrate.
Acid, dilute with water to the mark and shake well. 1.00mL of this standard solution contains 50.0μg of phosphorus. It is also available in certified standard solutions.
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