|
US$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 4702.3-2016: Chromium metal -- The determination of phosphorus content -- Bismuth phosphate molybdenum blue spectrophotometric method
Status: Valid GB/T 4702.3: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4702.3-2016 | English | 139 |
Add to Cart
|
3 days [Need to translate]
|
Chromium metal -- The determination of phosphorus content -- Bismuth phosphate molybdenum blue spectrophotometric method
| Valid |
GB/T 4702.3-2016
|
| GB/T 4702.3-1984 | English | 159 |
Add to Cart
|
2 days [Need to translate]
|
Methods for chemical analysis of chromium metal. The molybdenum blue photometric method for the determination of phosphorus content
| Obsolete |
GB/T 4702.3-1984
|
PDF similar to GB/T 4702.3-2016
Basic data | Standard ID | GB/T 4702.3-2016 (GB/T4702.3-2016) | | Description (Translated English) | Chromium metal -- The determination of phosphorus content -- Bismuth phosphate molybdenum blue spectrophotometric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H11 | | Classification of International Standard | 77.100 | | Word Count Estimation | 7,712 | | Date of Issue | 1984-10-04 | | Date of Implementation | 2017-07-01 | | Older Standard (superseded by this standard) | GB/T 4702.3-1984 | | Regulation (derived from) | National Standard Announcement 2016 No.14 | | Issuing agency(ies) | General Administration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 | GB/T 4702.3-2016: Chromium metal -- The determination of phosphorus content -- Bismuth phosphate molybdenum blue 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.
Chromiun metal - The determination of phosphorus content - Bismuth phosphate molybdenum blue spectrophotometric method
ICS 77.100
H11
National Standards of People's Republic of China
Replacing GB/T 4702.3-1984
Determination of chromium content in metals
Bismuth - phosphorus - molybdenum blue spectrophotometric method
2016-08-29 released
2017-07-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Management Committee released
Foreword
GB/T 4702 is divided into 16 parts.
- Part 1. Determination of chromium chromium content - Ammonium ferrous sulfate titration method
Part 2. Determination of chromium content in metallic materials - Perchloric acid gravimetric method
Part 3. Determination of chromium content in metals - Bismuth - phosphorus - molybdenum blue spectrophotometric method
- Part 4. Determination of metallic chromium content - Ethylenediamine tetraacetic acid disodium titration and flame atomic absorption spectrometry
- Part 5. Determination of metallic chromium content - Ethylenediamine tetraacetic acid disodium titration and flame atomic absorption spectrometry
- Part 6. Determination of metallic ferrochromium, aluminum, silicon and copper content - Inductively coupled plasma atomic emission spectrometric method
- Part 7. Determination of chromium content in metals - Distillation separation - Nessler reagent spectrophotometric method
- Part 8. Methods for chemical analysis of chromium metal - Distillation - molybdenum blue spectrophotometric method for the determination of arsenic content
Part 9. Methods for chemical analysis of metallic chromium - Determination of antimony content by crystal violet spectrophotometry
- Part 10. Methods for chemical analysis of metallic chromium - The copper reagent spectrophotometric method for the determination of copper content
- Part 11. Methods for chemical analysis of metallic chromium - Determination of tin content by alizarin violet spectrophotometry
- Part 12. Determination of chromium, nitrogen and hydrogen content of metals - Inhalation of inert gases - Infrared absorption method and thermal conductivity method
Part 13. Methods for chemical analysis of metallic chromium - The polarographic method for the determination of lead content
- Part 14. Methods for chemical analysis of metallic chromium - The infrared absorption method for the determination of carbon content
- Part 15. Determination of chromium, tin, bismuth, antimony and arsenic content of metallic chromium - Mass spectrometry
- Part 16. Determination of chromium content in metals - Infrared absorption method and combustion neutralization titration method
This part is part 3 of GB/T 4702.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This part of the GB/T 4702.3-1984 "metal chromium chemical analysis method molybdenum blue photometric determination of phosphorus".
This part compares with GB/T 4702.3-1984. The main technical changes are as follows.
--- the standard name to "metal chromium phosphorus content determination bismuth phosphorus molybdenum blue spectrophotometric method";
--- Added "warning" language;
- Added "normative reference documents" and "test reports";
The amount of the sample should be weighed according to the different contents of phosphorus, and the sample is weighed 0.500g, accurate to 0.0001g;
--- measured wavelength from 825nm to 700nm;
--- sodium sulfite instead of sodium bisulfite reduction test solution;
--- using ammonium molybdate and bismuth nitrate mixed solution for the color test solution;
- Reduction with ascorbic acid instead of hydrazine sulfate;
--- color temperature from boiling water bath to 20 ℃ ~ 30 ℃ color;
--- will allow the difference from three levels to four levels.
This part is made by China Iron and Steel Industry Association.
This section is under the jurisdiction of the National Technical Committee on Standardization of Pig Iron and Ferroalloys (SAC/TC318).
This part of the drafting unit. CITIC Jinzhou Metal Co., Ltd., Jiangsu Province (Shagang Iron and Steel Institute of Iron and Steel, metallurgical industry information standards
Academy.
The main drafters of this part. Jin Aidi, Sun Xiaofei, Gu Feng, Li Yaguang, Zhou Qiang, Chen Zibin, Lu Chunsheng.
This part of the previous version of the standard to replace the release of the situation.
--- GB/T 4702.3-1984.
Determination of chromium content in metals
Bismuth - phosphorus - molybdenum blue spectrophotometric method
WARNING - Personnel using this section should have practical experience in formal laboratory work. This section does not indicate all possible security questions
question. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions set forth in the relevant national regulations.
1 Scope
This part of GB/T 4702 specifies the determination of phosphorus content by bismuth phosphorus molybdenum blue spectrophotometry.
This part is applicable to the determination of phosphorus content in metal chromium, the determination range (mass fraction). 0.002% ~ 0.040%.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
GB/T 4010 Ferroalloy chemical analysis of the sample to take and preparation
GB/T 6682 Analytical laboratory water specifications and test methods
Metallurgical products - Chemical analysis - Spectrophotometric methods
GB/T 12806 Laboratory glass instruments Single line capacity bottles
GB/T 12807 Laboratory glass instruments - Index pipettes
GB/T 12808 Laboratory glass instruments Single line suction pipette
3 principle
The sample was dissolved with perchloric acid, heated to chlorate, so that phosphorus was oxidized to orthophosphoric acid, with hydrochloric acid and sodium chloride in addition to chromium. In sulfuric acid medium,
Phosphorus and bismuth and ammonium molybdate to produce yellow bismuth phosphorus molybdenum heteropoly acid, with ascorbic acid to be reduced to bismuth phosphorus molybdenum blue heteropoly acid, in the spectrophotometer measured its suction
Luminosity.
4 Reagents and Materials
Unless otherwise stated, only the confirmed analytical reagent is used in the analysis, and the water used is distilled or deionized or substantially pure water,
Should comply with GB/T 6682 secondary water requirements.
4.1 Sodium chloride, solid.
4.2 perchloric acid, ρ = 1.70 g/mL.
4.3 Hydrochloric acid, ρ = 1.19 g/mL
4.4 ammonia, ρ = 0.90g/mL.
4.5 Sulfuric acid, 1 1.
4.6 ascorbic acid, 20g/L, with the preparation.
4.7 sodium sulfite, 5g/L.
4.8 ammonium molybdate solution, 24g/L.
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 4702.3-2016_English be delivered?Answer: Upon your order, we will start to translate GB/T 4702.3-2016_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 4702.3-2016_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 4702.3-2016_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 [email protected]. 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 4702.3-2016?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 4702.3-2016 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.
|