GB/T 4701.7-2009 English PDF

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GB/T 4701.7-2009: Ferrotitanium -- Determination of phosphorus content -- Molybdo bismuth phosphorus blue spectrophotometric method and the molybdenum blue spectrophotometric method
Status: Valid

GB/T 4701.7: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4701.7-2009	189	Add to Cart	3 days	Ferrotitanium -- Determination of phosphorus content -- Molybdo bismuth phosphorus blue spectrophotometric method and the molybdenum blue spectrophotometric method	Valid
GB/T 4701.7-1985	199	Add to Cart	2 days	Methods for chemical analysis of ferrotitanium--The molybdenum blue spectrophotometric method for the determination of phosphorus content	Obsolete

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Basic data

Standard ID: GB/T 4701.7-2009 (GB/T4701.7-2009)
Description (Translated English): Ferrotitanium -- Determination of phosphorus content -- Molybdo bismuth phosphorus blue spectrophotometric method and the molybdenum blue spectrophotometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H11
Classification of International Standard: 77.100
Word Count Estimation: 8,893
Date of Issue: 2009-07-08
Date of Implementation: 2010-04-01
Older Standard (superseded by this standard): GB/T 4701.7-1985
Quoted Standard: GB/T 4010
Regulation (derived from): National Standard Approval Announcement 2009 No.9 (Total No.149)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the use of phosphorus molybdenum blue spectrophotometry bismuth and molybdenum blue spectrophotometric determination of iron in iron- phosphorus content. This section applies to the determination of phosphorus content of iron chin.

GB/T 4701.7-2009: Ferrotitanium -- Determination of phosphorus content -- Molybdo bismuth phosphorus blue spectrophotometric method and the molybdenum blue spectrophotometric method

---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.
Ferrotianium.Determination of phosphorus content.Molybdobismuthylphosphoric blue spectrophotometric method and the molybdenum blue spectrophotometric method ICS 77.100 H11 National Standards of People's Republic of China Replacing GB/T 4701.7-1985 Determination of phosphorus content of ilmenite Bismuth phosphorus molybdenum blue spectrophotometric method and the molybdenum blue spectrophotometric method Posted 2009-07-08 2010-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This Part replaces GB/T 4701.7-1985 "spectrophotometric determination of the amount of phosphorus chemical analysis of ferrotitanium Molybdenum blue spectrophotometric method." This portion of the GB/T 4701.7-1985 comparison, the main changes are. --- Added bismuth phosphorus molybdenum blue spectrophotometric method; --- In the method 2 molybdenum blue spectrophotometric absorbance will be measured "along with sample blank as the reference" to "water as a reference." This part is proposed by the China Iron and Steel Association. This part of pig iron and ferroalloy by the National Standardization Technical Committee. This section is drafted. Sichuan Investment Emei Ferroalloy (Group) Co., Ltd. The main drafters of this section. should Tang Hua, Fang Yan, Zhang Yingxia, history of the soldiers. This part of the standard replaces the previous editions are. --- GB/T 4701.7-1985. Determination of phosphorus content of ilmenite Bismuth phosphorus molybdenum blue spectrophotometric method and the molybdenum blue spectrophotometric method Warning --- Use this section shall be a person experiences regular laboratory work. This section does not point out all possible security asked question. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.

1 Scope

This section provides bismuth phosphorus molybdenum blue spectrophotometric method and the molybdenum blue spectrophotometric determination of phosphorus content ilmenite. This section applies to the determination of phosphorus content in the ilmenite. Measurement range (mass fraction). 0.010% to 0.150%.

2 Normative references

The following documents contain provisions which, through reference in this text, constitute provisions of this part. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this section, however, encourage the parties to this part of the research agreement Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 4010 alloy chemical analysis and preparation of samples Method 3 a bismuth phosphomolybdate blue spectrophotometry 3.1 Principle A specimen in nitric acid, hydrofluoric acid decomposition, sulfuric acid and perchloric smoke phosphorus oxide, with sodium hydroxide and iron, titanium and phosphorus to form a precipitate separated. filter Was acidified with sulfuric acid in sulfuric acid medium, sodium thiosulfate reducing high arsenic, bismuth nitrate and phosphorus, molybdenum, bismuth molybdate forming phosphorus ligands three yuan Was, after ascorbic acid with phosphorus forming bismuth phosphorus molybdenum blue, 700nm wavelength measured absorbance on a spectrophotometer, the calibration curve Quality Richard phosphorus content in the sample is calculated phosphorus. 3.2 Reagents and materials Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled water or its equivalent purity water. 3.2.1 nitrate, ρ1.42g/mL. 3.2.2 hydrofluoric acid, ρ1.15g/mL. 3.2.3 perchloric acid, ρ1.67g/mL. 3.2.4 sulfuric acid, ρ1.84g/mL. 3.2.5 sulfate, 1 + 5. 3.2.6 sulfate, 1 + 7. 3.2.7 sodium hydroxide solution, 200g/L. Store in plastic bottle. 3.2.8 sodium thiosulfate solution, 10g/L. 1L containing 20g of anhydrous sodium sulfite, formulated with time. 3.2.9 bismuth nitrate solution, 30g/L. Weigh 15g of bismuth nitrate [Bi (NO3) 3 · 5H2O], placed in 600mL beaker, add 50mL Nitrate (1.42g/mL), and until completely dissolved, 2g of urea, 450mL of water, and mix. 3.2.10 ammonium molybdate solution, 35g/L. Weigh 3.5g of ammonium molybdate [(NH4) 6Mo7O24 · 4H2O], placed in 200mL beaker, add Into 100mL water, warmed to dissolve and mix. Use filtered. 3.2.11 ascorbic acid solution, 10g/L. Ascorbic Weigh 5g, placed in 600mL beaker was added 500mL ethanol (1 + 1), mixed uniform. Formulated with time. 3.2.12 ammonium ferric sulfate solution, 90g/L. Weigh 45g of ammonium ferric sulfate (NH4Fe (SO4) 2 · 12H2O) placed in 600mL beaker, Was added 85mL of water, add 15mL sulfuric acid (3.2.5), dissolved completely, was added 400mL of water, and mix. ......

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