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GB/T 24221-2009 English PDF

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US$229.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 24221-2009: Chromium ores -- Determination of calcium and magnesium contents -- EDTA titrimetric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 24221-2009	229	Add to Cart	3 days	Chromium ores -- Determination of calcium and magnesium contents -- EDTA titrimetric method	Valid

Similar standards

GB/T 29516 SN/T 2638.3 GB/T 24197 GB/T 24222 GB/T 24223 GB/T 24220

Basic data

Standard ID: GB/T 24221-2009 (GB/T24221-2009)
Description (Translated English): Chromium ores -- Determination of calcium and magnesium contents -- EDTA titrimetric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D33
Classification of International Standard: 73.060.30
Word Count Estimation: 10,161
Date of Issue: 2009-07-15
Date of Implementation: 2010-04-01
Adopted Standard: ISO 5975-1983, MOD
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 the determination of chromium ore, calcium and magnesium contents EDT person titration. This standard applies to the determination of chromium ore, calcium and magnesium contents.

GB/T 24221-2009: Chromium ores -- Determination of calcium and magnesium contents -- EDTA titrimetric 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 - Determination of calcium and magnesium contents - EDTA titrimetric method ICS 73.060.30 D33 National Standards of People's Republic of China Determination of chrome ore, calcium and magnesium content EDTA titration (ISO 5975. 1983, MOD) 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

This revised standard adopts ISO 5975. 1983 "chrome ore calcium and magnesium content - EDTA titration method" (in English), in order to party Then compare lists of the national control list of standard terms and provisions of international standards in Appendix A. Taking into account the needs of the actual operation, this standard at the time of adoption of international standards has been modified. These technical differences vertical single Line identification in which they are involved in terms of margin. It gives a list of the technical differences and their reasons in Appendix B for reference. This standard and ISO 5975. 1983 compared to the main job of the following changes. --- "2 Normative references" in place of national standards with international standards corresponding; --- 7.4.1 Terms increase the burning time requirements; --- 7.5 Terms with hexamethylenetetramine and copper reagent instead of ammonia separation interfering elements; --- 7.6 Terms mixed indicator replaced by indicator calcein and calcein Barry phenolphthalein; --- Added "6 sampling and sample preparation" clause; --- Added "7.1 Determination of the number of times" clause; --- Added "10 Test Report" clause. The Standard Annexes A and B are informative appendices. The standard proposed by China Iron and Steel Association. This standard by the National Standardization Technical Committee of pig iron and ferroalloy. Pipette second part of the test solution, with chrome black T as indicator, titration with EDTA standard solution of calcium and magnesium total (pH10). Calculation magnesium subtraction content.

4 Reagents

Unless otherwise stated, use only reagents of recognized analytical grade and distilled water or equivalent purity of its water, in line with the provisions of GB/T 6682's. 4.1 sodium carbonate, anhydrous or pre-ignition at 500 ℃ to constant weight. 4.2 potassium chloride. 4.3 hexamethylenetetramine. 4.4 hydrochloride, ρ1.19g/mL. HCl 4.5, 1 + 1. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 24221-2009_English be delivered?

Answer: Upon your order, we will start to translate GB/T 24221-2009_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 24221-2009_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 24221-2009_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.