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LY/T 1644-2023 English PDF

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Q: Should I purchase the latest version LY/T 1644-2023?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version LY/T 1644-2023 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$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
LY/T 1644-2023: Test method for gallic acid
Status: Valid

LY/T 1644: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
LY/T 1644-2023	199	Add to Cart	3 days	Test method for gallic acid	Valid
LY/T 1644-2005	359	Add to Cart	3 days	Test method for analysis of gallic acid	Obsolete

Similar standards

GB/T 8140 GB/T 18011 GB/T 8146 LY/T 1355 LY/T 1699 LY/T 1302

Basic data

Standard ID: LY/T 1644-2023 (LY/T1644-2023)
Description (Translated English): Test method for gallic acid
Sector / Industry: Forestry Industry Standard (Recommended)
Classification of Chinese Standard: B72
Classification of International Standard: 65.020
Word Count Estimation: 10,181
Date of Issue: 2023-06-19
Date of Implementation: 2023-11-01
Issuing agency(ies): State Forestry and Grassland Administration

LY/T 1644-2023: Test method for gallic acid

---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 65.020 CCSB72 Forestry Industry Standard of the People's Republic of China Replace LY/T 1644-2005 Gallic acid test method Released on 2023-06-19 2023-11-01 Implementation The State Forestry and Grassland Administration issued

Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Test methods 1 4.1 Determination of loss on drying 1 4.2 Determination of Gallic Acid Content 2 4.3 Determination of ignition residue 3 4.4 Water solubility test 3 4.5 Tannic acid test 3 4.6 Sulfate test 3 4.7 Chloride test 4 4.8 Determination of chromaticity 4 4.9 Determination of turbidity 5 4.10 Determination of Iron 5 4.11 Determination of heavy metals 5 Appendix A (Informative) High Performance Liquid Chromatography of Gallic Acid 6

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 replaces LY/T 1644-2005 “Test Method for Analysis of Gallic Acid”. In addition to structural adjustments and editorial changes, the main technical changes are as follows. --- Changed the determination method of gallic acid content (see 4.2); --- Changed the determination method of iron (see 4.10); --- The determination method of heavy metals has been changed (see 4.11). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the State Forestry and Grassland Administration. This document is under the jurisdiction of the National Technical Committee for Standardization of Forest Chemical Products (SAC/TC558). This document was drafted by. Research Institute of Forest Products Chemical Industry, Chinese Academy of Forestry, Wufeng Chicheng Biotechnology Co., Ltd., Wufeng Tujia Autonomous County Public Inspection and Testing Center, Xiamen Changke Bioengineering Co., Ltd., Zhangjiajie Jiurui Biotechnology Co., Ltd., Sichuan Tingjiang New Materials Co., Ltd., Guiyang Beilong Biotechnology Co., Ltd., Zunyi Beiyuan Chemical Co., Ltd., and Huaqiao University. The main drafters of this document are. Zhang Liangliang, Xu Man, Wang Yongmei, Chen Chiqing, Liu Yiwen, Jiang Zongran, Zhao Guofeng, Ren Langtao, Luo Zhijun, Zhang Jiming, Tang Lihua. The previous versions of this document and the documents it replaces are as follows. ---First published in.2005 as LY/T 1644-2005; ---This is the first revision. Gallic acid test method

1 Scope

This document describes the test methods for gallic acid products. This document applies to the analysis of gallic acid product quality.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 605 General method for colorimetric determination of chemical reagents GB 5009.74 National Food Safety Standard Heavy Metal Limit Test for Food Additives GB 5009.90 National Food Safety Standard Determination of Iron in Food GB/T 6682 Specifications and test methods for water used in analytical laboratories GB/T 6284 General method for determination of moisture in chemical products - Loss on drying method GB/T 7531 Determination of ignition residue of organic chemical products GB/T 9729 General method for determination of chloride in chemical reagents

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Gallic acid Chemical name. 3,4,5-trihydroxybenzoic acid. Usually contains 1 crystal water. Molecular formula.C6H2(OH)3COOH·H2O Molecular weight. 188.14 Structural formula.

4 Test methods

Unless otherwise specified, all reagents used in this document are of analytical grade. 4.1 Determination of loss on drying Carry out in accordance with the provisions of GB/T 6284.When measuring, weigh about 1g of sample, accurate to 0.0001g, and the drying temperature is 105℃±2℃. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of LY/T 1644-2023_English be delivered?

Answer: Upon your order, we will start to translate LY/T 1644-2023_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 LY/T 1644-2023_English with my colleagues?

Answer: Yes. The purchased PDF of LY/T 1644-2023_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 LY/T 1644-2023?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version LY/T 1644-2023 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.