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GB/T 41322-2022 English PDF

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US$119.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 41322-2022: Hardmetals - Determination of silicon in cobalt metal powders - Photometric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 41322-2022	119	Add to Cart	3 days	Hardmetals - Determination of silicon in cobalt metal powders - Photometric method	Valid

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Basic data

Standard ID: GB/T 41322-2022 (GB/T41322-2022)
Description (Translated English): Hardmetals - Determination of silicon in cobalt metal powders - Photometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H16
Word Count Estimation: 6,665
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 41322-2022: Hardmetals - Determination of silicon in cobalt metal powders - Photometric 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.
Hardmetals - Determination of silicon in cobalt metal powders - Photometric method ICS 77.160 CCSH16 National Standards of People's Republic of China Spectrophotometric Method for Determination of Silicon Content in Cemented Carbide Cobalt Powder Published on 2022-03-09 2022-10-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. This document is modified using ISO 11877.2008 "Spectrophotometric Method for Determination of Silicon in Cemented Carbide Cobalt Powder". Two chapters "Normative References" and "Terms and Definitions" have been added to this document. The technical differences between this document and ISO 11877.2008 and their reasons are as follows. --- The silicon content range is changed from "20μg/g~300μg/g" to "5μg/g~300μg/g" (see Chapter 1, ISO 11877.2008 Chapter 1), silicon is an impurity element in cobalt powder, and my country has strict requirements on the content of silicon in cobalt powder, often requiring less than 20μg/g, and change the silicon content range to meet my country's control requirements for silicon content in cobalt powder. --- Deleted "Platinum thimble for weighing samples" (see 4.4 of ISO 11877.2008), because it is not necessary to use white The gold thimble weighs the sample, and the sample can be directly weighed into the distillation flask, which is easier to operate. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Nonferrous Metals Industry Association. This document is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243). This document is drafted by. Zigong Cemented Carbide Co., Ltd., Nonferrous Metal Technology and Economic Research Institute Co., Ltd., Qingyuan Jiazhi New Materials Research Institute Co., Ltd., Guizhou Provincial Institute of Analysis and Testing, National Standard (Beijing) Inspection and Certification Co., Ltd. The main drafters of this document. Weng Gang, Hu Qiming, Wu Yanhua, Kan Yumei, Zhou Yuanjing, Li Juan, Fu Haikuo, Su Cheng, Li Na, Deng Nan, Long Shangjun. Spectrophotometric Method for Determination of Silicon Content in Cemented Carbide Cobalt Powder

1 Scope

This document specifies the spectrophotometric method for the determination of the amount of silicon in cobalt powder, and the content of silicon is 5μg/g~300μg/g. This document applies to the determination of silicon content in cemented carbide cobalt powder.

2 Normative references

There are no normative references in this document.

3 Terms and Definitions

There are no terms and definitions that need to be defined in this document.

4 Principles

The sample was treated with mixed acid and distilled to form silicon tetrafluoride, which was absorbed by the mixed solution of boric acid and sodium molybdate, and extracted with methyl isobutyl ketone. The obtained silico-molybdate complex was measured, and the absorbance of the methyl isobutyl ketone phase solution was measured.

5 Reagents

Use high-purity reagents and double-distilled water or water of the same purity in the analysis. 5.1 Hydrofluoric acid, the mass fraction is 40%. 5.2 Nitric acid, the mass fraction is 65%. 5.3 Hydrochloric acid, the mass fraction is 30%. 5.4 Sulfuric acid, the mass fraction is 96%. 5.5 Perchloric acid, the mass fraction is 70%. 5.6 Sodium hydroxide solution, the mass fraction is 30%. 5.7 Boric acid. 5.8 Sodium molybdate. 5.9 Sulfamic acid. 5.10 Methyl isobutyl ketone. 5.11 Acetone. 5.12 Water. 5.13 Nitrogen. 5.14 Silicon standard solution, 100 μg/mL.

6 Instruments and equipment

All instruments and equipment that come into contact with reagents should be made of silicone-free materials, such as. polytetrafluoroethylene (PTFE), polypropylene (PP), polyethylene ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 41322-2022_English be delivered?

Answer: Upon your order, we will start to translate GB/T 41322-2022_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 41322-2022_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 41322-2022_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.