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GB/T 40833-2021 English PDF

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US$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 40833-2021: Determination of p-coumaric acid in sugarcane rinds - High performance liquid chromatography
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 40833-2021	139	Add to Cart	3 days	Determination of p-coumaric acid in sugarcane rinds - High performance liquid chromatography	Valid

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Basic data

Standard ID: GB/T 40833-2021 (GB/T40833-2021)
Description (Translated English): Determination of p-coumaric acid in sugarcane rinds - High performance liquid chromatography
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: B30
Word Count Estimation: 7,715
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 40833-2021: Determination of p-coumaric acid in sugarcane rinds - High performance liquid chromatography

---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.
Determination of p-coumaric acid in sugarcane rinds - High performance liquid chromatography ICS 67.080.01 CCSB30 National Standards of People's Republic of China Detection method of coumaric acid in bagasse High performance liquid chromatography Released on 2021-10-11 2022-05-01 implementation State Administration for Market Regulation Issued 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 of Standardization Documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed and managed by the China National Institute of Standardization. Drafting organizations of this document. Beijing University of Chemical Technology, Shenzhen Institute of Standards and Technology, Beijing Electronics Technology Vocational College, China Standardization Research Institute, Food and Drug Environmental Inspection Research Institute (Shandong) Group Co., Ltd., China Agricultural University, Dalian Yilite Analytical Instrument Co., Ltd., Tianjin Alta Technology Co., Ltd., China Testing Testing and Certification Group Co., Ltd., Zhongshan Neide Agricultural Technology Co., Ltd., Jikesi Agricultural Technology (Xuzhou) Limited company. The main drafters of this document. Wei Yun, Xi Xingjun, Yang Zhihua, Lan Tao, Ni Hanwen, Sun Xuewen, Che Fenfang, Tang Tao, Xin Xiulan, Zhao Xinxin, Zhang Teng, Xie Jun, Liu Tao, Zhang Lei, Liu Cong, Sun Yu, Liu Jinling, Xu Yin, Shi Shanling. Detection method of coumaric acid in bagasse High performance liquid chromatography

1 Scope

This document describes the high performance liquid chromatography method for the determination of coumaric acid in bagasse. This document is applicable to the qualitative and quantitative determination of coumaric acid in bagasse. Refer to the content detection of products containing coumaric acid use. The detection limit of this document is 26.8mg/g, and the limit of quantification is 89.2mg/g.

2 Normative references

The content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations 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. GB/T 6682 Analytical laboratory water specifications and test methods GB/T 6379.2 Accuracy of measurement methods and results (accuracy and precision) Part 2.Determine the repeatability of standard measurement methods Basic methods of sex and reproducibility

3 Terms and definitions

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

4 Principle

The bagasse sample is extracted with 2mol/L NaOH solution, the pH is adjusted to about 2.0 with 6mol/L HCl solution, and ethyl acetate is extracted. After being taken, it was separated by C18 chromatographic column, detected by ultraviolet-visible light detector, chromatographic peak retention time was qualitative, and external standard method was used for quantification.

5 Reagents and materials

5.1 Reagents Unless otherwise stated, all reagents are chromatographically pure, and the water is the first grade water specified in GB/T 6682. 5.1.1 Methanol (chromatographically pure). 5.1.2 Acetic acid (chromatographically pure). 5.1.3 Ethyl acetate (chromatographically pure). 5.1.4 Hydrochloric acid (high-grade pure 36%~38%). 5.1.5 Sodium hydroxide (analytical grade). 5.2 Reagent preparation Acetic acid aqueous solution (0.1%). Pipette 0.25mL acetic acid (5.1.2) into a 250mL volumetric flask, and dilute to the mark with water. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 40833-2021_English be delivered?

Answer: Upon your order, we will start to translate GB/T 40833-2021_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 40833-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 40833-2021_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.