GB/T 24226-2009 English PDF

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GB/T 24226-2009: Chromium ores and concentrates -- Determination of calcium contents -- Flame atomic absorption spectrometric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 24226-2009	189	Add to Cart	3 days	Chromium ores and concentrates -- Determination of calcium contents -- Flame atomic absorption spectrometric method	Valid

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Basic data

Standard ID: GB/T 24226-2009 (GB/T24226-2009)
Description (Translated English): Chromium ores and concentrates -- Determination of calcium contents -- Flame atomic absorption spectrometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D33
Classification of International Standard: 73.060.30
Word Count Estimation: 8,859
Date of Issue: 2009-07-15
Date of Implementation: 2010-04-01
Quoted Standard: GB/T 6682; GB/T 12806; GB/T 12808; GB/T 24243; ISO 6154-1989
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 a flame atomic absorption spectrometry Chromium ores and concentrates calcium. This standard applies to the determination of chromium ores and concentrates in calcium content. Side of the given range (mass fraction, calcium oxide meter): 0. 1% -1. 0 %.

GB/T 24226-2009: Chromium ores and concentrates -- Determination of calcium contents -- Flame atomic absorption spectrometric 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.
Chromium ores and concentrates. Determination of calcium contents. Flame atomic absorption spectrometric method ICS 73.060.30 D33 National Standards of People's Republic of China Determination of Chromium ores and concentrates calcium content Flame Atomic Absorption Spectrometry Posted 2009-07-15 2010-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

Appendix A of this standard is an informative annex. The standard proposed by China Iron and Steel Association. This standard by the National Standardization Technical Committee of pig iron and ferroalloy. Drafting of this standard. Ningbo Inspection and Quarantine Institute of Science and Technology, People's Republic of China Tianjin Entry-Exit Inspection and Quarantine Bureau, Metallurgical Industry Information Standards Institute. The main drafters of this standard. forest edge, Chenshao Hong, Zheng Lin, shall pine, slowly Fu, Gu Songhai, Chenzi Bin. Determination of Chromium ores and concentrates calcium content Flame Atomic Absorption Spectrometry Warning --- personnel should use this standard regular laboratory work experience. This standard 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 standard specifies the flame atomic absorption spectrometry Chromium ores and concentrates calcium content. This standard applies to the determination of chromium ores and concentrates in calcium content. Measurement range (mass fraction, calcium oxide meter). 0.10% ~ 1.00%.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3687. 1987, MOD) GB/T 12806 Laboratory glassware single marking flask (GB/T 12806-1991, eqvISO 1042. 1983) GB/T 12808 standard laboratory glassware single line pipette (GB/T 12808-1991, eqvISO 648. 1977) GB/T 24243 chrome ore samples taken parts (GB/T 24243-2009, ISO 6153. 1989, IDT) ISO 6154. 1989 chrome ore sample preparation Principle 3 Sample sodium peroxide in a zirconium crucible of molten metal exploded. Melt dissolved in hot water, hydrochloric acid and rinsed acidified zirconium metal crucible, boiled Decompose excess sodium peroxide. EDTA as protective agent, strontium chloride and lanthanum chloride solution as release agents, interference suppression elements. In the atomic absorption On a take-spectrometer, the wavelength at 422.7nm, air - acetylene flame measured absorbance of calcium.

4 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity, in line with GB/T 6682 regulations. 4.1 sodium peroxide. Warning --- sodium peroxide has a strong oxidation, can not contact with organic matter and other reducing substances, or prone to fire and explosion. Sodium peroxide after waste paper or similar combustible materials shall not be thrown into the waste tank wrap, rinse with water discharged into the sewer, so as not to cause spontaneous combustion Fire. 4.2 hydrochloride, ρ1.19g/mL. HCl 4.3, 1 + 1. Solution 4.4 EDTA, disodium edetate dihydrate, C10H14N2O8Na2 · 2H2O, 100g/L. Weigh 50.0gEDTA, placed in 500mL beaker, add 400mL water, dissolved by heating, cooled to room temperature. The solution was transferred to 500mL volumetric flask, dilute with water to volume, and mix. 4.5 Sr solution, 50g/L. Weigh 30.43g high purity strontium chloride (SrCl2 · 6H2O, the mass fraction of 99.99%) in the 150mL beaker, dissolved in water, move ......

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