GB/T 4699.3-2007 English PDF

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GB/T 4699.3-2007: Ferrochromium, silicon chromium and nitrogen-bearing ferrochromium -- Determination of phosphorus content -- Molybdo bismuthyl phosphoric blue spectrophotometric method and the molybdenum blue spectrophotometric method
Status: Valid

GB/T 4699.3: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4699.3-2007	239	Add to Cart	3 days	Ferrochromium, silicon chromium and nitrogen-bearing ferrochromium -- Determination of phosphorus content -- Molybdo bismuthyl phosphoric blue spectrophotometric method and the molybdenum blue spectrophotometric method	Valid
GB/T 4699.3-1984	199	Add to Cart	2 days	Methods for chemical analysis of silicochromium--The molybdenum blue photometric method for the determination of phosphorus content	Obsolete

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GB/T 5686.2   GB/T 5686.4   GB/T 4336   GB/T 4699.2   GB/T 4699.4   GB/T 4699.6   

Basic data

Standard ID: GB/T 4699.3-2007 (GB/T4699.3-2007)
Description (Translated English): Ferrochromium, silicon chromium and nitrogen-bearing ferrochromium -- Determination of phosphorus content -- Molybdo bismuthyl phosphoric 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: 9,917
Date of Issue: 2007-10-25
Date of Implementation: 2008-04-01
Older Standard (superseded by this standard): GB/T 5687.3-1985; GB/T 4699.3-1984
Regulation (derived from): China National Standard Approval Announcement2007 No.12 (Total No.112)
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 secret blue spectrophotometry and phosphorus relative phase blue spectrophotometric method-Determination of phosphorus content. This section applies to chromium iron, determination of silicon nitride ferrochrome and chrome phosphorus content, vacuum micro- carbon ferrochrome. Secret blue spectrophotometric determination of phosphorus phase range (mass fraction): 0. 008%-0. 080%, platinum blue spectrophotometric measurement range (mass fraction): <0. 15 %.

GB/T 4699.3-2007: Ferrochromium, silicon chromium and nitrogen-bearing ferrochromium -- Determination of phosphorus content -- Molybdo bismuthyl phosphoric 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.
Ferrochromium, silicochromium and nitrogen-bearing ferrochromium. 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 4699.3-1984, GB/T 5687.3-1985 Chromium iron, chrome and silicon nitride ferrochrome Determination of phosphorus content Bismuth phosphorus molybdenum blue spectrophotometric method and the molybdenum blue spectrophotometric method Posted 2008-04-01 2007-10-25 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This section GB/T 4699 is to GB/T 4699.3-1984 "Determination of silicon alloy chemical analysis of molybdenum blue phosphorus content" And GB/T 5687.3-1985 "Methods for chemical analysis of ferrochromium - The molybdenum blue spectrophotometric determination of phosphorus content," the integration of amendments. This section contains bismuth phosphorus molybdenum blue spectrophotometric method and the molybdenum blue spectrophotometric determination of two ferrochrome, chrome silicon nitride ferrochrome phosphorus content points Analytical methods. This Part replaces GB/T 4699.3-1984 "Determination of silicon alloy chemical analysis of molybdenum blue phosphorus content" and GB/T 5687.3-1985 "the amount of ferrochromium - Determination of phosphorus chemical analysis of molybdenum blue." This part of GB /4699.3-1984 GB/T 5687.3-1985 compared to the main changes and T. the new addition of bismuth phosphomolybdate blue spectrophotometric This part is proposed by the China Iron and Steel Association. This section is under the jurisdiction of Metallurgical Industry Information Standards Institute. This section is drafted. Sichuan Investment Emei Ferroalloy (Group) Co., Ltd. The main drafters of this section. should Tang Hua, Fang Yan. This part of the standard replaces the previous editions are. --- GB/T 4699.3-1984; --- GB/T 5687.3-1985. Chromium iron, chrome and silicon nitride ferrochrome Determination of phosphorus content 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

GB/T 4699 provisions of this part of the bismuth phosphorus molybdenum blue spectrophotometric method and the molybdenum blue spectrophotometric determination of phosphorus content. This section applies to chromium iron, vacuum micro-carbon ferrochrome, ferrochrome and silicon nitride was measured phosphorus content of chromium alloy, bismuth phosphorus molybdenum blue spectrophotometry Given range (mass fraction). 0.008% - 0.080%; molybdenum blue spectrophotometric measurement range (mass fraction). < 0.15%.

2 Normative references

The following documents contain provisions which, through this part of GB/T 4699 in the reference in terms of this section. For dated references Documents, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Research into whether the parties to the agreement to use 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 Samples with hydrochloric acid - hydrogen peroxide or with nitric acid - hydrofluoric acid decomposition of perchlorate in the state smoke, play with hydrochloric acid chromium; or anhydrous carbonate Sodium - sodium peroxide mixed flux melt decomposition. In sulfuric acid, sodium thiosulfate reducing high arsenic, phosphorus and bismuth nitrate, ammonium molybdate form three Yuan complex, forming bismuth phosphorus molybdenum blue by ascorbic reducing phosphorus, measured absorbance at 700nm wavelength spectrophotometer. 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 sodium peroxide, solid. 3.2.2 anhydrous sodium carbonate solids. 3.2.3 perchloric acid, ρ1.67g/mL. 3.2.4 hydrochloric acid, ρ1.19g/mL. 3.2.5 Hydrogen peroxide, ρ1.10g/mL, pure class distinctions. 3.2.6 nitrate, ρ1.42g/mL. 3.2.7 hydrofluoric acid, ρ1.15g/mL. 3.2.8 sulfuric acid, 1 + 1. 3.2.9 sulfate, 1 + 2 3.2.10 sodium sulfite solution, 100g/L. Weigh 100g of anhydrous sodium sulfite, dissolved in water, diluted with water to 1000mL. 3.2.11 sodium thiosulfate solution, 5g/L. 1L containing 10g of anhydrous sodium sulfite, formulated with time. 3.2.12 bismuth nitrate solution, 30g/L. Weigh 30g of bismuth nitrate [Bi (No3) 3 · 5H2O], was dissolved in 100mL nitrate (1.42g/L) In until completely dissolved by adding 900mL water, 4g urea, and mix. 3.2.13 ammonium molybdate solution, 33g/L. Weigh 33g of ammonium molybdate [(NH4) 6Mo7O24 · 4H2O], placed in 400mL beaker, add ......

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