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GB/T 31948-2015 English PDF

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GB/T 31948-2015: Chromium ores -- Determination of mercury content -- Solid sampling and direct mercury analysis method
Status: Valid
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GB/T 31948-2015English128 Add to Cart 1 days [Need to translate] Chromium ores -- Determination of mercury content -- Solid sampling and direct mercury analysis method Valid GB/T 31948-2015

PDF similar to GB/T 31948-2015


Standard similar to GB/T 31948-2015

GB/T 14949.11   GB/T 29516   SN/T 2638.3   GB/T 29517   GB/T 24192   

Basic data

Standard ID GB/T 31948-2015 (GB/T31948-2015)
Description (Translated English) Chromium ores -- Determination of mercury content -- Solid sampling and direct mercury analysis method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard D33
Classification of International Standard 73.060.30
Word Count Estimation 9,960
Date of Issue 2015-09-11
Date of Implementation 2016-06-01
Quoted Standard GB/T 602; GB/T 6379.2; GB/T 6682; GB/T 8170; GB/T 24243; GB/T 29517; JJG 548
Regulation (derived from) National Standard Announcement 2015 No.25
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 method for determination of solid sampling mercury content measured directly. This Standard applies to the determination of chromium ore mercury content measurement range: 0.001��g/g ~ 5.00��g/g.

GB/T 31948-2015: Chromium ores -- Determination of mercury content -- Solid sampling and direct mercury analysis method


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(Chrome ore mercury content of solid injection Direct Determination) ICS 73.060.30 D33 National Standards of People's Republic of China Determination of mercury content of chrome ore Direct solid sampling assay Issued on. 2015-09-11 2016-06-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by China Iron and Steel Association. This standard by the national pig iron and ferroalloy Standardization Technical Committee (SAC/TC318) centralized. This standard was drafted. Tianjin Entry-Exit Inspection and Quarantine Bureau of Metallurgical Industry Information Standards Institute. The main drafters of this standard. Guo Fen, Su Mingyue, Gu Songhai, Yangjin Kun, Li Quan Bin, Wang Hong, Song Yi, Wang Haoyun, newly Hood, Chenzi Bin. Determination of mercury content of chrome ore Direct solid sampling assay Warning --- the use of this standard should have practical experience in regular laboratory work. This standard does not point out all possible security problem. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions of the relevant provisions of the State.

1 Scope

This standard specifies the method for determination of solid sampling mercury content measured directly. This standard applies to the determination of chromium ore mercury content measurement range. 0.001μg/g ~ 5.00μg/g.

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. Preparation of standard solution of GB/T 602 Determination of impurities in chemical reagents GB/T 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the standard measurement method to repeat Of the basic methods of reproduction Laboratory use specifications and test methods GB/T 6682 Analysis GB/T 8170 repair value expressed about the rules and limit values \u200b\u200band judgment GB/T 24243 chrome ore samples taken part GB/T 29517 bulk chrome ore manual sample preparation method JJG548 mercury analyzer test procedures Principle 3 In an oxygen atmosphere, the sample was dried in calciner and thermal decomposition, the decomposition products by the catalytic oxygen stream is supplied to the furnace, the addition After impurities and catalytic decomposition, sample pyrolysis mercury into mercury atoms, selective capture by the flow of oxygen into the gold amalgam vessel. After purification system was purged with oxygen, rapid heating amalgamation device, releasing mercury vapor. Mercury vapor is brought into the single-wavelength optical absorption cell at a wavelength 253.65nm mercury measured absorbance was quantified using the standard curve method.

4 Reagents and materials

Unless otherwise indicated in the analysis using only the gifted class pure reagents and in line with GB/T 6682 provisions of a homogeneous water or water. 4.1 nitric acid, ρ1.42g/mL. 4.2 nitric acid solution, 119. 4.3 potassium dichromate. 4.4 potassium dichromate solution, 10g/L. Weigh 1g potassium dichromate (see 4.3) were dissolved in 100mL of water.

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