GB/T 27973-2011 English PDF

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GB/T 27973-2011: Methods for chemical analysis of volatilized silica
Status: Valid

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GB/T 27973-2011	529	Add to Cart	4 days	Methods for chemical analysis of volatilized silica	Valid

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Basic data

Standard ID: GB/T 27973-2011 (GB/T27973-2011)
Description (Translated English): Methods for chemical analysis of volatilized silica
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q11
Classification of International Standard: 91.100.10
Word Count Estimation: 23,287
Date of Issue: 2011-12-30
Date of Implementation: 2012-10-01
Quoted Standard: GB/T 2007.1; GB/T 6682; JJG 196
Regulation (derived from): National Standard Approval Announcement 2011 No.23
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 silica fume silica, moisture and chloride ion analysis methods, ferric oxide, magnesium, LOI, alkali content. This standard applies to unite silica fume and silica fume.

GB/T 27973-2011: Methods for chemical analysis of volatilized silica

---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.
Methods for chemical analysis of volatilized silica ICS 91.100.10 Q11 National Standards of People's Republic of China Methods for chemical analysis of silica fume Issued on. 2011-12-30 2012-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Preface Ⅰ 1 Scope 1 2 Normative references 1 Basic requirements 3 Test 1 4 Reagents and materials 1 5 instruments and equipment 8 Sample Preparation 6 9 7 Determination of moisture content of 10 8 - Determination of loss on ignition ignition subtraction --- 10 9 Determination of chloride --- ammonium thiocyanate volumetric method (Reference method) 11 --- 10 Determination of chloride ion phosphate distillation - mercuric nitrate titration (on behalf of usage) 11 11 Determination of potassium oxide and sodium oxide --- a flame photometric method (Reference method) 12 12 Determination of potassium oxide and sodium oxide --- Atomic Absorption Spectrometry (generation of usage) 13 13 Determination of silicon dioxide --- ammonium chloride gravimetric method (Reference method) 14 14 Determination of silicon dioxide --- potassium fluosilicate volumetric method (generation of usage) 15 15 Determination of ferric oxide --- Phenanthroline spectrophotometric method (Reference method) 16 16 Determination of ferric oxide --- EDTA direct titration (on behalf of usage) 17 17 Determination of magnesium by atomic absorption spectrometry --- 17 18 repeatability limit and reproducibility limit 18

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by China Building Materials Federation. This standard by the National Standardization Technical Committee cement (SAC/TC184) centralized. This standard was drafted. China Building Materials Science Research Institute, China Building Material Test Certification Center Co., Ltd., Jiaxing Southern Water Limited mud. The main drafters of this standard. Cui Jian, Liu Long, Wang Ruihai, Huang Qinglin, Nizhu Jun, wearing flat, in grams of filial piety, yellow small building, Wen Yugang. Methods for chemical analysis of silica fume

1 Scope

This standard specifies the silica fume silica, iron oxide, magnesium oxide, loss on ignition, alkali content, water content and analysis of chloride ion. This standard applies to cohesion and silica fume silica fume.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 2007.1 bulk minerals sampling and sample preparation General manual sampling methods Laboratory use specifications and test methods GB/T 6682 Analysis Glass Container JJG196 common test procedures Basic requirements 3 trials 3.1 represents the quality, volume and results Mass in grams, accurate to 0.0001g. Unless otherwise specified, the volume of straw represented by mL accuracy by JJG196 Regulation Scheduled execution. The test results in mass fraction, calculated chlorine test results and expressed to three decimal places, other ingredients are expressed to one decimal Two. 3.2 blank test The same amount of reagents, no test, tested in accordance with the same measurement step, the measurement result is corrected. 3.3 Burning The filter paper and precipitate into previously been burned and constant crucible and drying. In an oxidizing atmosphere ashing slowly, so that the flame does not produce Health, ashing to no black carbon particles, into the high-temperature furnace (5.5), and at a predetermined temperature burning. Cool to room temperature in a desiccator, and weigh. 3.4 constant After the first burning, cooling, weighing, by continuous burning for every 15min, then cooled, weighing method to check the constant quality Amount, when the difference is less than two consecutive weighing 0.0005g, which reached constant.

4 Reagents and materials

4.1 General The reagent is not less than analytical. For calibration and reagent preparation of standard solutions, unless otherwise stated should be the base reagent. The water Shall comply with the requirements of the three water GB/T 6682 stipulated. ......

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