GB/T 223.73-2008 English PDFUS$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 223.73-2008: Iron, steel and alloy -- Determination of iron contents -- Titanium trichloride-potassium dichromate titration method Status: Valid GB/T 223.73: Historical versions
Basic dataStandard ID: GB/T 223.73-2008 (GB/T223.73-2008)Description (Translated English): Iron, steel and alloy -- Determination of iron contents -- Titanium trichloride-potassium dichromate titration method Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H11 Classification of International Standard: 77.080.01 Word Count Estimation: 8,871 Date of Issue: 2008-05-13 Date of Implementation: 2008-11-01 Older Standard (superseded by this standard): GB/T 223.73-1991 Quoted Standard: GB/T 6379.1; GB/T 6379.2; GB/T 20066 Regulation (derived from): National Standard Approval Announcement 2008 No.8 (Total No.121) 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 use of titanium trichloride-potassium dichromate titration of iron content. This section applies to high-temperature alloys and precision alloys for the determination of the mass fraction of 0. 50% ~ 8. 00% iron content. GB/T 223.73-2008: Iron, steel and alloy -- Determination of iron contents -- Titanium trichloride-potassium dichromate titration 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. Iron, steel and alloy. Determination of iron contents. Titanium trichloride-potassium dichromate titration method ICS 77.080.01 H11 National Standards of People's Republic of China Replacing GB/T 223.73-1991 Determination of iron, steel and alloy content Titanium trichloride - potassium dichromate titration Posted 2008-05-13 2008-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordTitanium This section GB/T 223 instead of GB/T 223.73-1991 "steel and alloy chemical analysis method trichloride - potassium content Determination of iron content "Method. This portion of the GB/T 223.73-1991 compared primarily with the following modifications. --- To modify the standard name; --- Increased water analysis reagents and instructions to modify the content and concentration of representation; --- Modify Weigh Sample volume representation; --- Modification result in the amount of formula and formula unit; --- Specification precision functional description. Appendix A of this section is informative appendix. This part is proposed by the China Iron and Steel Association. This part of the National Steel Standardization Technical Committee. This section drafted by. China Iron and Steel Research Institute Group. The main drafters of this section. Cuiqiu Hong, Wang Yuxing. This part of the standard replaces the previous editions are. GB 223.73 (a) -1981, GB 223.73-1991. Determination of iron, steel and alloy content Titanium trichloride - potassium dichromate titration Warning. Use of this section shall be a person experiences regular laboratory work. This section does not indicate that all possible security issues. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.1 ScopeGB/T 223 provisions of this part of the titanium trichloride - potassium dichromate titration Determination of iron content. This section applies to high-temperature alloys and precision alloys for the determination of the mass fraction of 0.50% - 8.00% iron content.2 Normative referencesThe following documents contain provisions which, through reference GB/T 223 of this text, constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 6379.1 measurement methods and results of Accuracy (trueness and precision) - Part 1. General principles and definitions GB/T 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the weight of a standard measurement method The basic method of refolding and reproducibility GB/T 20066 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method Principle 3 Samples with hydrochloric acid - nitric acid dissolution mixed with smoke perchlorate, chromium and niobium acid sufficiently dehydrated, heat soluble salts dissolved in hydrochloric acid Class, and then ammonia precipitation of iron to nickel, chromium and other element separation. With dilute hydrochloric acid to dissolve the ferric hydroxide, sodium tungstate as indicator, titanium trichloride The ferric iron is reduced to divalent. Low potassium dichromate with an excess of titanium oxide is expensive. Then to diphenylamine sulfonate as indicator, potassium dichromate Divalent iron standard solution titration.4 Reagents and materialsUnless otherwise stated, the analysis using only the confirmation of analytical grade reagents and distilled water or its equivalent purity. 4.1 ammonium chloride. 4.2 hydrochloric acid, ρ about 1.19g/mL. 4.3 hydrochloride, ρ of about 1.19g/mL, diluted 1 + 3. 4.4 hydrochloride, ρ of about 1.19g/mL, diluted to 5 + 95. 4.5 nitric acid, ρ about 1.42g/mL. 4.6 nitric acid, ρ about 1.42g/mL, diluted 1 + 1. 4.7 perchloric acid, ρ about 1.67g/mL. 4.8 sulfuric acid - phosphoric acid mixture. A 150mL sulfuric acid (ρ about 1.84g/mL), 200mL phosphate (ρ about 1.69g/mL) was slowly poured into 650mL of water and continue stirring and cooling. 4.9 ammonia, ρ about 0.90g/mL. 4.10 ammonia, ρ about 0.90g/mL, diluted to 5 + 95. 4.11 sodium hydroxide solution, 200g/L. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 223.73-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 223.73-2008_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 223.73-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 223.73-2008_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+ countriesQuestion 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.Question 5: Should I purchase the latest version GB/T 223.73-2008?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 223.73-2008 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
