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GB/T 39689-2020 English PDF

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US$169.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 39689-2020: Surface active agents - Determination of free formaldehyde
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39689-2020	169	Add to Cart	3 days	Surface active agents - Determination of free formaldehyde	Valid

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Basic data

Standard ID: GB/T 39689-2020 (GB/T39689-2020)
Description (Translated English): Surface active agents - Determination of free formaldehyde
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G72
Classification of International Standard: 71.100.40
Word Count Estimation: 9,954
Date of Issue: 2020-12-14
Date of Implementation: 2021-07-01
Quoted Standard: GB/T 601; GB/T 6372; GB/T 6682-2008
Regulation (derived from): National Standard Announcement No. 28 of 2020
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the principles and requirements for the determination of free formaldehyde content in surfactants, and specifies the standard chromatograms given by spectrophotometer and liquid chromatography. This standard applies to the determination of free formaldehyde content in surfactants.

GB/T 39689-2020: Surface active agents - Determination of free formaldehyde

---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.
(Surfactant Determination of free formaldehyde content) ICS 71:100:40 G72 National Standards of People's Republic of China Determination of Free Formaldehyde Content in Surfactants 2020-12-14 release 2021-07-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Foreword

This standard was drafted in accordance with the rules given in GB/T 1:1-2009: This standard was proposed by the China Petroleum and Chemical Industry Federation: This standard is under the jurisdiction of the National Chemical Standardization Technical Committee (SAC/TC63): Drafting organizations of this standard: Zhejiang Wulong New Materials Co:, Ltd:, Liaoning Aoke Chemical Co:, Ltd:, Jiangyin Jiuniu Technology Co:, Ltd: Company, Zhejiang Real Madrid New Material Technology Co:, Ltd:, Zhejiang Lvkean Chemical Co:, Ltd: The main drafters of this standard: Ding Jiying, Li Xiaofei, Dong Zhenpeng, Liu Weiqin, Wu Bingmou, Shen Chunyan, Yu Pei, Ma Haofeng, Gao Hongjun, Liu Jia, Ma Jianxin, Liu Baisong: Determination of Free Formaldehyde Content in Surfactants

1 Scope

This standard determines the principles and requirements for the determination of free formaldehyde content in surfactants, and specifies the spectrophotometric method and liquid chromatography The standard chromatogram given by the method: This standard applies to the determination of free formaldehyde content in surfactants:

2 Normative references

The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article Pieces: For undated references, the latest version (including all amendments) applies to this document: GB/T 601 Preparation of Standard Titration Solution for Chemical Reagents GB/T 6372 Surface active agent and detergent sample dividing method GB/T 6682-2008 Analysis laboratory water specifications and test methods

3 Principle

The free formaldehyde in the sample is evaporated by distillation, and after the color is developed with a color developer, it is determined by a spectrophotometer or liquid chromatography: Formaldehyde content:

4 Preparation of formaldehyde standard solution

4:1 General In the analysis test, only reagents that have been confirmed to be analytically pure are used, and the water used meets the requirements of Grade 3 water in GB/T 6682-2008: Used Unless otherwise specified, the solution should be prepared according to the requirements in GB/T 601: 4:2 Iodine solution c(1/2I2)=0:1mol/L aqueous solution: 4:3 Sodium hydroxide solution The concentration is 1mol/L: 4:4 Hydrochloric acid solution The concentration is 1mol/L: 4:5 Sodium thiosulfate standard solution The concentration is 0:1mol/L, and it is calibrated in accordance with GB/T 601: 4:6 Starch solution The concentration is 1g/100mL, weigh 1g starch, use a small amount of water to make a paste, pour it into 100mL boiling water, it is a transparent solution, when it is used ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 39689-2020_English be delivered?

Answer: Upon your order, we will start to translate GB/T 39689-2020_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 39689-2020_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 39689-2020_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.