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GB/T 6702-2022 English PDF

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Q: Should I purchase the latest version GB/T 6702-2022?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 6702-2022 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$119.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 6702-2022: Naphthalene sulphuric acid test
Status: Valid

GB/T 6702: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 6702-2022	119	Add to Cart	3 days	Naphthalene sulphuric acid test	Valid
GB/T 6702-2000	199	Add to Cart	2 days	Naphthalene sulphuric acid test	Obsolete
GB/T 6702-1986	RFQ	ASK	3 days	Naphthalene sulphuric acid test	Obsolete

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Basic data

Standard ID: GB/T 6702-2022 (GB/T6702-2022)
Description (Translated English): Naphthalene sulphuric acid test
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G18
Word Count Estimation: 5,586
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 6702-2022: Naphthalene sulphuric acid test

---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.
Naphthalene sulphuric acid test ICS 71.080 CCSG18 National Standards of People's Republic of China Replacing GB/T 6702-2000 Naphthalene acid wash colorimetric test method Published on 2022-07-11 2022-11-01 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 replaces GB/T 6702-2000 "Naphthalene acid wash colorimetric test method", compared with GB/T 6702-2000, except for structural adjustment and In addition to editorial changes, the main technical changes are as follows. a) Modified normative references (see Chapter 2, Chapter 2 of the.2000 edition); b) Changed the reagents (see 5.1, 4.1 of the.2000 edition); c) Changed the requirements for colorimetric tubes (see 5.3, 6.1, 4.3, 5.1 of the.2000 edition); d) The requirements for balances have been changed (see 6.6, 5.6 of the.2000 edition); e) The sampling method and preparation content of the sample have been changed (see Chapter 7, Chapter 6 of the.2000 edition); f) Added the test report chapter (see Chapter 11). 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 Iron and Steel Association. This document is under the jurisdiction of the National Standardization Technical Committee of Coal Chemical Industry (SAC/TC469). This document is drafted by. Shandong Chenyang New Carbon Materials Co., Ltd., Zhangjiagang Tengxiang Machinery Manufacturing Co., Ltd., Metallurgical Industry Information Standards Institute. The main drafters of this document. Yan Guilin, Yan Ping, Zhang Haixia, Zhao Weiliang, Shen Yanjun, Zhu Weisu, Wang Xiaoyuan. This document was first published in 1986, revised for the first time in.2000, and this is the second revision. Naphthalene acid wash colorimetric test method Caution - Persons using this document should have practical experience in formal laboratory work. This document does not address all possible security issues question. It is the user's responsibility to take appropriate safety and health measures and to ensure compliance with the conditions stipulated by relevant national regulations.

1 Scope

This document specifies the reagents and solutions, instruments and equipment, sample collection and preparation, test procedures, test test results, tolerances and test reports. This document applies to the colorimetric test of coking naphthalene pickling extracted from coal tar.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. GB/T 1999 Sampling method for coking oil products GB/T 2000 Sampling method for coking solid products GB/T 6682 Analysis Laboratory Water Specifications and Test Methods

3 Terms and Definitions

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

4 Principles

Compare the color produced by the reaction of the sample in concentrated sulfuric acid with the color of the standard colorimetric solution to determine the colorimetric number.

5 Reagents and Solutions

5.1 Reagents Unless otherwise specified, only the reagents confirmed to be analytically pure are used in the analysis, and the water used shall meet the requirements of grade 3 and above in GB/T 6682 Do not ask for water. 5.1.1 Cobalt chloride (CoCl2·6H2O). 5.1.2 Ferric chloride (FeCl3 6H2O). 5.1.3 Copper sulfate (CuSO4·5H2O). 5.1.4 Hydrochloric acid, ρ≈1.19g/mL. 5.1.5 Sulfuric acid. excellent grade pure, ρ≈1.84g/mL. 5.2 Stock solutions 5.2.1 Preparation of 1% (mass fraction) hydrochloric acid solution. Measure 23.6 mL of hydrochloric acid (5.1.4) in a 1000 mL volumetric flask, add water to dilute to ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 6702-2022_English be delivered?

Answer: Upon your order, we will start to translate GB/T 6702-2022_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 6702-2022_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 6702-2022_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.

Question 5: Should I purchase the latest version GB/T 6702-2022?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 6702-2022 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.