HOME   Cart(8)   Quotation   About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189759 (19 Oct 2025)

GB/T 23196-2008 English PDF

US$209.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 23196-2008: Determination of ferulic acid content in propolis -- HPLC-UV method
Status: Valid
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 23196-2008English209 Add to Cart 3 days [Need to translate] Determination of ferulic acid content in propolis -- HPLC-UV method Valid GB/T 23196-2008

PDF similar to GB/T 23196-2008


Standard similar to GB/T 23196-2008

GH/T 1081   GB/T 23742   GB/T 24283   GB/T 45293   GB/T 45191   GB/T 23195   

Basic data

Standard ID GB/T 23196-2008 (GB/T23196-2008)
Description (Translated English) Determination of ferulic acid content in propolis -- HPLC-UV method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard B47
Classification of International Standard 65.140
Word Count Estimation 9,999
Date of Issue 2008-12-31
Date of Implementation 2009-06-01
Quoted Standard GB/T 6682
Regulation (derived from) National Standard Approval Announcement 2008 No.27 (Total No.140)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the propolis liquid chromatographic method ferulic acid. This standard applies to the determination of ferulic acid in propolis. The detection limit of this standard: 4 ��g/kg.

GB/T 23196-2008: Determination of ferulic acid content in propolis -- HPLC-UV 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.
Determination of ferulic acid content in propolis. HPLC-UV method ICS 65.140 B47 National Standards of People's Republic of China Determination of ferulic acid in propolis LC - UV detection method Posted 2008-12-31 2009-06-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard Annex A, Annex B and Annex C is informative appendix. This standard is proposed and managed by China Federation of Supply and Marketing Cooperatives. This standard was drafted. Australian Medicare Ling Pharmaceutical Co., Ltd. in Hangzhou, China Federation of Supply and Marketing Cooperatives bee products Standardization Technical Committee Council, Chinese Academy of Agricultural Sciences Institute of bees, CIQ Jiangsu, Nanjing University, Jiangsu Laoshan biotechnology company. The main drafters of this standard. Yuying Min, Hu Xiaolan, Zhu Jinliang, Xu Chengzhi, Zhou Jinhui, Li Gonghai, Chen Kun, Hong vibration training. Determination of ferulic acid in propolis LC - UV detection method

1 Scope

This standard specifies the liquid chromatographic method propolis ferulic acid. This standard applies to the determination of ferulic acid in propolis. The detection limit of this standard. 4μg/kg.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) Principle 3 Propolis ferulic acid with methanol ultrasonic extraction, precipitation, centrifugation, and then the supernatant was 0.45μm membrane filtration by reverse phase column After separation by liquid chromatography - ultraviolet detector measurement, external standard, based on the retention times and peak areas for qualitative and quantitative.

4 Reagents and materials

Unless otherwise specified, the reagents used were of analytical grade; water as a water GB/T 6682 provisions (distilled water or equivalent purity water); not When specified with a solvent which formulated refers to an aqueous solution. 4.1 Methanol. chromatographically pure. 4.2 0.085% phosphoric acid solution (volume fraction). amount of 0.85mL phosphoric acid, water volume to 1000mL, through 0.45μm membrane filter. 4.3 acetonitrile. chromatography. 4.4 70% methanol (by volume). Measure 70mL of analytical grade methanol was added 30mL of water were mixed uniformly. 4.5 ferulic acid standard substance. purity ≥99%. 4.6 ferulic acid standard stock solution (200.0μg/mL). Weigh accurately 10.0mg (accurate to 0.1mg) ferulic acid standard substance (4.5) In 50mL brown volumetric flask, add 70% methanol (4.4) to dissolve and dilute to volume, and mix, this solution can be at a temperature lower than 4 ℃ ice Box refrigerated for two months. 4.7 ferulic acid standard solution. Pipette appropriate amount of ferulic acid standard stock solution (4.6) 1mL, 2.5mL, 5.0mL, 10.0mL, 20.0mL, 40.0mL, 80.0mL to 100mL volumetric flask, with 70% methanol (4.4) to the mark, dubbed 2.0μg/mL, 5.0μg/mL, 10.0μg/mL, 20.0μg/mL, 40.0μg/mL, 80.0μg/mL, 160.0μg/mL working standard Solution, now with the current.

5 instruments and equipment

5.1 liquid chromatograph. equipped with a UV detector. 5.2 Analytical balance. accurate to 0.1mg. 5.3 membrane filter (polyvinylidene fluoride microporous membrane type F, 25mm). 0.45μm. 5.4 ultrasound.

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 23196-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 23196-2008_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 23196-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 23196-2008_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 [email protected]. 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.