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GB/T 21931.3-2008 English PDF

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US$154.00 · In stock
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GB/T 21931.3-2008: Nickel, ferronickel and nickel alloys -- Determination of phosphorus content -- Phosphovanoclonolybeate molecular absorption spectrometric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21931.3-2008	154	Add to Cart	3 days	Nickel, ferronickel and nickel alloys -- Determination of phosphorus content -- Phosphovanoclonolybeate molecular absorption spectrometric method	Valid

Similar standards

GB/T 21931.1 GB/T 21933.1 GB/T 21933.2 GB/T 21931.2 GB/T 21932

Basic data

Standard ID: GB/T 21931.3-2008 (GB/T21931.3-2008)
Description (Translated English): Nickel, ferronickel and nickel alloys -- Determination of phosphorus content -- Phosphovanoclonolybeate molecular absorption spectrometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H11
Classification of International Standard: 77.100
Word Count Estimation: 8,874
Date of Issue: 2008-05-30
Date of Implementation: 2008-12-01
Quoted Standard: GB/T 6379.1; GB/T 6379.2
Adopted Standard: ISO 11400-1992, IDT
Regulation (derived from): National Standard Approval Announcement 2008 No.9 (Total No.122)
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 molybdovanadophosphoric yellow spectrophotometric determination of nickel, nickel-iron alloys and nickel phosphorus content. This section applies to nickel, determination of ferronickel and nickel alloys phosphorus content. Measuring range (mass fraction): 0. 0005% to 0. 05 %. Available arsenic excluded and volatile complexing effect, interference elements titanium and tungsten, chromium, hafnium, niobium, silicon, button. In the low- interference element content, the lowest measured phosphorus content of 0. 0005 % (mass fraction).

GB/T 21931.3-2008: Nickel, ferronickel and nickel alloys -- Determination of phosphorus content -- Phosphovanoclonolybeate molecular 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.
Nickel, ferronickel and nickel alloys. Determination of phosphorus content. Phosphovanoclonolybeate molecular absorption spectrometric method ICS 77.100 H11 National Standards of People's Republic of China GB/T 21931.3-2008/ISO 11400.1992 Determination of nickel, ferronickel and nickel alloys phosphorus content Phosphorus vanadium molybdenum yellow spectrophotometry (ISO 11400.1992, IDT) Posted 2008-05-30 2008-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This section GB/T 21931 equivalent international standard ISO 11400.1992 "nickel, ferronickel and nickel alloys - Determination of phosphorus content of phosphorus Vanadium molybdenum yellow spectrophotometry. " This part of ISO 11400.1992 technical content is identical, for ease of use, this section was amended as follows. a) "this International Standard" be replaced by "this section"; b) use a decimal point instead of a decimal comma ",". ","; c) Remove the preface to international standards; d) Normative references national standards. This part is proposed by the China Iron and Steel Association. This section is under the jurisdiction of Metallurgical Industry Information Standards Institute. This section is drafted. Shanxi Taigang Stainless Steel. The main drafters of this section. Daixue Qian, Hujian Chun, Zhao Yong Sin. GB/T 21931.3-2008/ISO 11400.1992 Determination of nickel, ferronickel and nickel alloys phosphorus content Phosphorus vanadium molybdenum yellow 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 21931 specifies the spectrophotometric determination of phosphorus - vanadium - molybdenum yellow spectrophotometry nickel, ferronickel and nickel alloys phosphorus content. This section applies to nickel, ferronickel and nickel alloys - Determination of phosphorus content. Measurement range (mass fraction). 0.0005% to 0.05%. Available complexing effect and volatile (eg, chromium) eliminate interference arsenic, chromium, hafnium, niobium, silicon, tantalum, titanium, tungsten, and other elements. Interference element content Low, the lowest measured phosphorus content reaches 0.0005% (mass fraction).

2 Normative references

The following documents contain provisions which, through reference GB/T 21931 in this section 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 6379.1-2004, ISO 5725-1.1994, IDT) GB/T 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the standard measurement method to repeat Of the basic methods of reproduction (GB/T 6379.2-2004, ISO 5725-2.1994, IDT) Principle 3 Mixing the sample with hydrochloric acid and nitric acid soluble kind, smoke perchloric acid, hydrochloric acid volatile chromium. High silicon compounds and insoluble fluoride was added solubilization in Perchloric acid and nitric acid medium, will be converted into the phosphorus vanadium molybdenum yellow phosphorus heteropolyacid. Phosphovanadomolybdate yellow with methyl isobutyl ketone extraction, arsenic compounds Citrate complex.

4 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled water or its equivalent purity water. 4.1 nitric acid, ρ1.42g/mL. 4.2 hydrochloride, ρ1.19g/mL. 4.3 perchloric acid, ρ1.62g/mL. 4.4 hydrofluoric acid, ρ1.15g/mL. Nitrate 4.5, 1 + 4. 4.6 citric acid solution, 500g/L. He said 500g of citric acid dissolved in water and diluted to 1000mL, and mix. 4.7 methyl isobutyl ketone (also known as 4-methyl-2-pentanone). 4.8 ammonium molybdate solution, 150g/L. He said 150g of ammonium molybdate was dissolved in water and diluted to 1000mL, and mix. Using now. If the blank Value is high or unstable, the need to replace another batch of reagents. 4.9 metavanadate solution, 2.5g/L. He said 2.5g ammonium metavanadate dissolved in water and diluted to 1000mL, and mix. 4.10 sodium nitrite solution, 50g/L. He said 50g of sodium nitrite dissolved in water and diluted to 1000mL, and mix. GB/T 21931.3-2008/ISO 11400.1992 ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 21931.3-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 21931.3-2008_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 21931.3-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 21931.3-2008_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.