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GB/T 223.43-2008 English PDF

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Q: Should I purchase the latest version GB/T 223.43-2008?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 223.43-2008 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.

US$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 223.43-2008: Iron, steel and alloy -- Determination of tungsten content -- Gravimetric method and spectrophotometric method
Status: Valid

GB/T 223.43: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 223.43-2008	279	Add to Cart	3 days	Iron, steel and alloy -- Determination of tungsten content -- Gravimetric method and spectrophotometric method	Valid
GB/T 223.43-1994	319	Add to Cart	3 days	Methods for chemical analysis of iron, steel and alloy. Determination of tungsten content	Obsolete
GB 223.43-1985	RFQ	ASK	3 days	Methods for chemical analysis of iron, steel and alloy--The cinchonine gravimetric method for the determination of tungsten content	Obsolete

Similar standards

GB/T 223.54 GB/T 223.37 GB/T 223.5 GB/T 223.60 GB/T 223.63 GB/T 223.26

Basic data

Standard ID: GB/T 223.43-2008 (GB/T223.43-2008)
Description (Translated English): Iron, steel and alloy -- Determination of tungsten content -- Gravimetric method and spectrophotometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H11
Classification of International Standard: 77.080.01
Word Count Estimation: 12,141
Date of Issue: 2008-05-13
Date of Implementation: 2008-11-01
Older Standard (superseded by this standard): GB/T 223.43-1994
Quoted Standard: GB/T 223.12; GB/T 223.14; GB/T 223; 26; 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 gravimetric method with cinchonine four chlorinated benzene and arsenic-thiocyanate-chloroform extraction spectrophotometric spectrophotometric determination of tungsten content. This section cinchonine weight method is suitable for alloy steel, temperature alloys and precision determination of the mass fraction of the alloy from 1. 00% to 22. 00% tungsten content. This section tetra phenylarsonic-thiocyanate-chloroform extraction spectrophotometry for carbon steel, alloy steel and high temperature alloys for the determination of the mass fraction of 0. 050% ~ 1. 50% tungsten content.

GB/T 223.43-2008: Iron, steel and alloy -- Determination of tungsten content -- Gravimetric method and spectrophotometric 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 tungsten content. Gravimetryc method and spectrophotometric method ICS 77.080.01 H11 National Standards of People's Republic of China Replacing GB/T 223.43-1994 Determination of tungsten content of steel and alloy Gravimetric method and spectrophotometry 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

Foreword

GB/T in this part 223 instead of the GB/T 223.43-1994 "steel and alloy chemical analysis method for determining the amount of tungsten." This portion of the GB/T 223.43-1994 compared primarily with the following modifications. --- Name to "Determination of tungsten steel and alloy content gravimetric method and spectrophotometry"; --- Increased water analysis reagents and instructions to modify the content and concentration of representation; --- Modified Weigh Sample volume represented; --- Modify the results of the formula in the amount of representation; --- Change the specification for 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. Institute of Metal Research, Daye steel mills. The main drafters of this section. Zhu Yuejin, Xu Zaishan. This part of the standard replaces the previous editions are. --- GB 223.43-1985, GB 223.43-1994; --- GB 223.44-1985. Determination of tungsten content of steel and alloy Gravimetric method and spectrophotometry 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 Scope

This section GB/T 223 requirements using cinchonine gravimetric and tetrakis phenylarsonic - thiocyanate - chloroform extraction photometric measurements Set tungsten content. This section cinchonine gravimetric method is suitable for steel, high temperature alloys and precision alloys mass fraction of 1.00% - 22.00% of the amount of tungsten Determination. This section tetrakis phenylarsonic - thiocyanate - chloroform extraction spectrophotometric method for carbon steel, alloy steel and high temperature alloys mass fraction To determine the number of 0.050% to 1.50% tungsten content.

2 Normative references

The 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 223.12 Methods for chemical analysis of iron, steel and alloys of sodium carbonate separation - diphenyl hydrazine spectrophotometric determination of chromium content GB/T 223.14 Methods for chemical analysis of iron, steel and alloys, tantalum reagent extraction and spectrophotometric determination of vanadium content Spectrophotometric determination of molybdenum content GB/T 223.26 Methods for chemical analysis of iron, steel and alloy The thiocyanate direct 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

3 a method cinchonine gravimetric method

3.1 Principle Free samples of niobium. In the hydrochloric acid solution, the nitric oxide, tungsten formed precipitate tungstate, tungsten caprylate Ning complete precipitation, filtration, burning After the addition of silicon with hydrofluoric acid vaporized, burning to constant, that is impure tungsten trioxide quality. Containing niobium samples. the niobium pentoxide and tungsten trioxide precipitated with sodium carbonate melt, after separating agent magnesium niobate by precipitation, and then β- naphthol quinoline Rhodamine B or precipitation of tungsten, burning to constant as an impure quality tungsten trioxide. Tungsten trioxide impure molten sodium carbonate, and filtered. Filtrate molybdenum, chromium, vanadium, respectively spectrophotometric determination of correction. Shen filter paper Lake iron, titanium and other impurities, burning into oxides after weighing. These oxides by subtracting the mass of impure tungsten trioxide mass, that was pure ozone Tungsten quality. 3.2 Reagents Unless otherwise indicated, the analysis uses only recognized as analytical grade reagents and distilled or deionized water or equivalent purity. 3.2.1 anhydrous sodium carbonate. 3.2.2 nitrate, ρ about 1.42g/mL. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 223.43-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 223.43-2008_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 223.43-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 223.43-2008_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+ 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.

Question 5: Should I purchase the latest version GB/T 223.43-2008?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 223.43-2008 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.