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GB/T 42022-2022 English PDF

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US$184.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 42022-2022: Essential oils - Determination of water content - Karl Fischer method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42022-2022	184	Add to Cart	3 days	Essential oils - Determination of water content - Karl Fischer method	Valid

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Basic data

Standard ID: GB/T 42022-2022 (GB/T42022-2022)
Description (Translated English): Essential oils - Determination of water content - Karl Fischer method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y41
Classification of International Standard: 71.100.60
Word Count Estimation: 10,136
Date of Issue: 2022-12-30
Date of Implementation: 2023-07-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42022-2022: Essential oils - Determination of water content - Karl Fischer 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.
ICS 71.100.60 CCSY41 National Standards of People's Republic of China Determination of water content in essential oils Karl Fischer method (ISO 11021.1999, IDT) Posted on 2022-12-30 2023-07-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

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 for Standardization Documents" drafting. This document is equivalent to ISO 11021.1999 "Determination of Moisture Content in Essential Oils by Karl Fischer Method". The following editorial changes have been made to this document. ---Changed the footnote, change the footnote to note (see 6.3); --- Increased note (see 9.3). Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China National Light Industry Council. This document is under the jurisdiction of the National Standardization Technical Committee of Fragrance, Flavor and Cosmetics (SAC/TC257). This document is drafted by. Shanghai Spice Research Institute Co., Ltd., Yiwu Product (Commodity) Quality Inspection Research Institute, Anke Cosmetics (Zhejiang Jiang) Co., Ltd., Shanghai University of Applied Technology, Shanghai Institute of Quality Supervision and Inspection Technology, China Academy of Inspection and Quarantine, Shanghai Center for Disease Control and Prevention, Yunnan China Tobacco Industry Co., Ltd. The main drafters of this document. Zhou Jiang, Jin Qizhang, Yang Bin, Ma Qiang, Feng Jun, Niu Yunwei, Chen Jun, Chen Tian, Mao Deshou, Xiong Wen, Cai Bingbiao, Ni Weiwei. Determination of water content in essential oils Karl Fischer method

1 Scope

This document describes the Karl Fischer method for the determination of water content in essential oils. This document applies to the determination of the moisture content of essential oils.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. Note. GB/T 6283-2008 Determination of moisture content in chemical products Karl Fischer method (general method) (ISO 760.1978, NEQ)

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Moisture contentwatercontent The amount of water contained in the essential oil. Note. Moisture content is expressed in mass fraction (%).

4 principles

The moisture present in the sample is absorbed by the dry methanol. The water reacts with the Karl Fischer reagent (without pyridine), while the Karl Fischer test The reagents were previously calibrated by titration using a Karl Fischer apparatus. Reaction endpoints were obtained electrometrically.

5 reactions

During the determination of moisture according to the Karl Fischer method, the moisture present in the sample, in the presence of an amine and an alcohol, reacts with iodine and dioxygen Sulfurization reaction. H2O I2 SO2 ROH 3RnNH3-n→2RnNH3-nHI RnNH3-nHSO4R In the formula, R is an alkyl or alkoxy group. The end point of the reaction is obtained by electrometry according to the remaining amount of iodine.

6 reagents

Use only approved analytical grade reagents and distilled water, or demineralized water, or water of equivalent purity. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 42022-2022_English be delivered?

Answer: Upon your order, we will start to translate GB/T 42022-2022_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 42022-2022_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 42022-2022_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.