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GB/T 223.55-2008 English PDF

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GB/T 223.55-2008: Iron, steel and alloy -- Determination of tellurium content -- Oscillo-polarographic method
Status: Obsolete

GB/T 223.55: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 223.55-2008English319 Add to Cart 3 days [Need to translate] Iron, steel and alloy -- Determination of tellurium content -- Oscillo-polarographic method Obsolete GB/T 223.55-2008
GB/T 223.55-1987English199 Add to Cart 2 days [Need to translate] Methods for chemical analysis of iron, steel and alloy--The direct oscillopolarographic method for the determination of tellurium content Obsolete GB/T 223.55-1987

PDF similar to GB/T 223.55-2008


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Basic data

Standard ID GB/T 223.55-2008 (GB/T223.55-2008)
Description (Translated English) Iron, steel and alloy -- Determination of tellurium content -- Oscillo-polarographic method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H11
Classification of International Standard 77.080.01
Word Count Estimation 8,880
Date of Issue 2008-05-13
Date of Implementation 2008-11-01
Older Standard (superseded by this standard) GB/T 223.55-1987; GB/T 223.56-1987
Quoted Standard GB/T 20066
Regulation (derived from) National Standard Approval Announcement 2008 No.8 (Total No.121)
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 separation polarography and thiol cotton-Determination of tellurium in steel and alloy content polarography. This section applies to iron polarography, raw cast iron and low- alloy steel measuring the mass fraction of 0. 001% to 0. 050% tellurium content, This section Sulfhydryl Cotton-oscillopolarographic law applies to raw cast iron, high, in, low alloy steel and high temperature alloys for the determination of the mass fraction 0. 00004% to 0. 001 % of the tellurium content.

GB/T 223.55-2008: Iron, steel and alloy -- Determination of tellurium content -- Oscillo-polarographic 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.
Iron, steel and alloy. Determination of tellurium content. Oscillo-polarographic method ICS 77.080.01 H11 National Standards of People's Republic of China Replacing GB/T 223.55 ~ 223.56-1987 Determination of tellurium content in steel and alloy Oscillopolarography law Posted 2008-05-13 2008-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This section GB/T 223 is a (direct) measurement of GB/T 223.55-1987 "steel and alloy chemical analysis Oscillopolarographic method Given the amount of tellurium "and GB/T 223.56-1987" steel and alloy chemical analysis method sulfhydryl cotton fiber separation - determination of tellurium content oscillopolarographic Law "Integration Amendments. This Part replaces GB/T 223.55-1987 and GB/T 223.56-1987. This portion of the GB/T 223.55-1987, GB/T 223.56-1987 compared primarily with the following modifications. --- Increased headline analysis of reagent and water content and instructions to modify the standard solution and the solution concentration of representation; --- Modify weighed sample quantity represents; --- Edit "Table 1" tellurium mass fraction range; --- Modify standard solution added in an amount of tellurium and delete the "standard addition method" of the contents; --- Modify formula and formula result in the amount of representation; --- Corrected the error in Method Two. tellurium content is 0.00004% 0.00010% of the allowable difference from ".00040%" is replaced by "0.000040%"; --- Method two added tellurium standard solution 0.20μg/mL of. This part is proposed by the China Iron and Steel Association. This part of the National Steel Standardization Technical Committee. This section is responsible for drafting units. China Iron and Steel Research Institute Group. The main drafters of this section. ROCKETS, Zhang Yuexia. This part of the standard replaces the previous editions are. --- GB/T 223.55-1987; --- GB/T 223.56-1987. Determination of tellurium content in steel and alloy Oscillopolarography law Warning. Use of this section shall be a person experiences regular laboratory work. This section does not indicate that all possible security issues. 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 GB/T 223 requirements using oscillopolarographic (direct) method and Sulfhydryl Cotton - detemination steel and alloy tellurium content. This section OSCILLOPOLAROGRAPHIC (direct) method is suitable for iron, raw iron and low alloy steel mass fraction of 0.001% to 0.050% tellurium content Determination; this section Sulfhydryl Cotton - oscillopolarographic law applies to raw cast iron, high, quality, and low-alloy steel and high temperature alloys fraction Determination of 0.00004% to 0.001% of the tellurium content.

2 Normative references

The following documents contain provisions which, through reference GB/T 223 of this text, constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 20066 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method 3 Method One. OSCILLOPOLAROGRAPHIC (direct) method 3.1 Principle With hydrochloric acid, nitric acid decomposition test material, evaporated divisible nitric acid, sulfuric acid - sodium chloride - mixed base solution of hydroxylamine hydrochloride, tellurium (Ⅳ) in peak potential -0.78V (Saturated calomel electrode), was a stable, sensitive oscillopolarographic current peak. Measuring the derivative of the current peak high concentration of tellurium in Within 0.20μg/25mL ~ 15μg/25mL range, peak height is proportional to the concentration. 75mg calcium (Ⅱ), 50mg magnesium (Ⅱ), Co (Ⅱ), 15mg of iron (Ⅲ), 10mg zinc (Ⅱ), 5mg lead (Ⅱ), aluminum (Ⅲ), 2.5mg Chromium (Ⅲ), thallium (Ⅰ), zirconium (Ⅳ), 2.0mg of manganese (Ⅱ), molybdenum (Ⅵ), 1.0mg of copper (Ⅱ), Ni (Ⅱ), 0.5mg arsenic (Ⅲ), beryllium (ⅱ), bismuth (Ⅲ), cadmium (Ⅱ), gallium (Ⅲ), indium (Ⅲ), niobium (Ⅴ), tin (Ⅳ), tantalum (Ⅴ), titanium (Ⅳ), vanadium (Ⅴ), 250μg antimony (Ⅲ), 50μg silver (ⅰ), Gold (Ⅲ), tin (Ⅱ), tungsten (Ⅵ), 100μg hafnium (Ⅳ), 15μg chromium (Ⅳ), 5μg Rhenium (Ⅶ) exists, does not interfere with 2.5μg tellurium (Ⅳ) measurement. Selenium (Ⅳ) serious interference, may be added hydrobromic acid was removed by evaporation. Those who have not traveled more than the above limit, the sample after treatment, which can be measured directly tellurium content. 3.2 Reagents Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled water or equivalent purity. 3.2.1 hydrochloric acid, ρ about 1.19g/mL. 3.2.2 nitrate, ρ about 1.42g/mL. 3.2.3 perchloric acid, ρ about 1.67g/mL. 3.2.4 hydrobromide, ρ about 1.49g/mL. 3.2.5 sulfate, 1 + 1. Take 100mL water, placed in a graduated 250mL beaker was slowly added (ρ 100mL sulfuric acid about 1.84g/mL), with stirring, cooled, diluted with water to the mark with 200mL, stir, add the reagent bottle and set aside. 3.2.6 sodium chloride solution, 300g/L.

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