GB/T 22650-2008 English PDF

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GB/T 22650-2008: Sodium hydroxide for industrial use -- Determination of calcium and magnesium content -- Complexometric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22650-2008	149	Add to Cart	2 days	Sodium hydroxide for industrial use -- Determination of calcium and magnesium content -- Complexometric method	Valid

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Basic data

Standard ID: GB/T 22650-2008 (GB/T22650-2008)
Description (Translated English): Sodium hydroxide for industrial use -- Determination of calcium and magnesium content -- Complexometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G11
Classification of International Standard: 71.060.40
Word Count Estimation: 5,545
Date of Issue: 2008-12-30
Date of Implementation: 2009-08-01
Quoted Standard: GB/T 601; GB/T 602; GB/T 603; GB/T 6682
Adopted Standard: ROCT 2263-1979 (1990), NEQ
Regulation (derived from): National Standard Approval Announcement 2008 No.21 (Total No.134)
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 total content of calcium and magnesium hydroxide for industrial use. This standard applies to the total content of calcium and magnesium is greater than or equal to 0. 0005 % of industrial products with sodium hydroxide.

GB/T 22650-2008: Sodium hydroxide for industrial use -- Determination of calcium and magnesium content -- Complexometric 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.
Sodium hydroxide for industrial use. Determination of calcium and magnesium content. Complexometric method ICS 71.060.40 G11 National Standards of People's Republic of China Hydroxide for industrial use Determination of total calcium and magnesium complexometric titration Posted 2008-12-30 2009-08-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard and Russian standards ΓOCT2263. 1979 (1990) "technical conditions for industrial use caustic soda" (Russian) degree of consistency Not equivalent. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee chlor-alkali Chemical Technical Committee. This standard was drafted. Jinxi Chemical Industry Research Institute, Xinjiang Zhongtai Chemical Co., Ltd., Qingdao Haijing Chemical Group Co., Ltd. Drafters of this standard. Chenpei Yun, Feng Ting Pei, Xia Lang required, Li Furong, Hu Liming. Please note that some of the content of this standard may involve patents. The standard release mechanism should not bear the responsibility to identify these patents. Hydroxide for industrial use Determination of total calcium and magnesium complexometric titration

1 Scope

This standard specifies the method for determination of total content of sodium, calcium and magnesium in the industry. This standard applies to the total content of calcium and magnesium is greater than or equal to 0.0005% of industrial products with sodium hydroxide.

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. Preparation of GB/T 601 chemical reagent standard titration solution GB/T 602 Determination of impurities in chemical reagents prepared standard solution (GB/T 602-2002, ISO 6353/1. 1982, NEQ) with GB/T 603 chemical reagent test method Preparations of articles (GB/T 603-2002, ISO 6353/1 with. 1982, NEQ) GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)

3 Method summary

At pH = 10, the calcium and magnesium ions in a sample and chrome black T indicator form a red complex with disodium edetate standards drop Fixed solution titrated to the solution from red to blue as the end point.

4 Reagents and materials

The method of the reagents and water, did not indicate when the other requirements, refer to the three water analytical reagent and GB/T 6682 or as specified Equivalent purity. Standard Solution test required impurity standard solution, preparations and products in the absence of other requirements, according to GB/T 601, GB/T 602, GB/T 603 provisions of preparation. 4.1 hydrochloric acid. 4.2 ammonia. 4.3 ammonia - ammonium chloride buffer solution. pH = 10. 4.4 Magnesium Standard solution. 0.1g/L. 4.5 disodium EDTA standard titration solution. Ba (EDTA) = 0.05mol/L. 4.6 disodium EDTA standard titration solution. Ba (EDTA) = 0.005mol/L. To measure the amount of disodium edetate standard volumetric solution (4.5), diluted 10-fold. This solution was formulated before use. 4.7 chrome black T indicator solution. 5g/L. 5. Apparatus General laboratory instruments and micro-burette (5mL, 0.02mL scale, A-level). ......

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