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GB/T 23869-2009 English PDF

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US$319.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 23869-2009: Method for determination of the total mercury in pollen
Status: Obsolete

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23869-2009	319	Add to Cart	3 days	Method for determination of the total mercury in pollen	Obsolete

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Basic data

Standard ID: GB/T 23869-2009 (GB/T23869-2009)
Description (Translated English): Method for determination of the total mercury in pollen
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: X04
Classification of International Standard: 67.180.10
Word Count Estimation: 8,812
Date of Issue: 2009-05-26
Date of Implementation: 2009-09-01
Quoted Standard: GB/T 6682
Regulation (derived from): PRC National Standard Approval Announcement 2009 No.7 (Total No.147)
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 method for the determination of total mercury in pollen. This standard applies to the determination of total mercury content in pollen. This standard limit of determination 0. 5��g/kg.

GB/T 23869-2009: Method for determination of the total mercury in pollen

---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.
Method for determination of the total mercury in pollen ICS 67.180.10 X04 National Standards of People's Republic of China Determination of total mercury pollen Posted 2009-05-26 2009-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

The standard proposed by China Federation of Supply and Marketing Cooperatives. This standard is under the jurisdiction of the national bee standardization working group. This standard was drafted. People's Republic of China Jiangsu Entry-Exit Inspection and Quarantine Bureau, Jiangsu Laoshan Biotechnology Co., Ltd., Nanjing University, Bee Research Institute, Chinese Academy of Agricultural Sciences. Drafters of this standard. Shen Chong-yu, Li Gonghai, Chen Kun, Wu Bin, Ding Tao, practicing Hong Zhen, Zhou Jinhui, Li Yi, Wang Peng. Determination of total mercury pollen

1 Scope

This standard specifies the method for determination of total mercury pollen. This standard applies to the determination of total mercury content in pollen. The standard lower limit of detection 0.5μg/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)

3 PRINCIPLE OF THE METHOD

After the sample was heated acid digestion in acidic medium, the sample Mercury is potassium borohydride (KBH4) reduction of mercury atoms by a carrier gas (argon Gas) into the atomizer at a special mercury hollow cathode lamp irradiation, emit fluorescence characteristic wavelength, the fluorescence intensity and the concentration of mercury being Ratio, compared with standard series quantitation.

4 Reagents

Unless otherwise indicated, the reagents used were of analytical grade water as a water GB/T 6682 regulations. 4.1 nitrate (excellent pure). 4.2 Hydrogen peroxide (30%). 4.3 Potassium hydroxide solution (5g/L). Weigh 5.0g of potassium hydroxide and diluted with deionized water to 1L, mix. 4.4 solution of potassium borohydride (1g/L). Weigh 1.0g of potassium borohydride, dissolved in 1L potassium hydroxide solution (5g/L), the mix, now with the current. 4.5 thiourea ascorbic acid solution (10g/L). Weigh 10g and 10g ascorbic acid, thiourea, with a 5% (volume fraction) nitric acid solution It was diluted to 1L, and mix. 4.6 mercury standard solution. 1000μg/mL. 4.7 mercury standard solution. lessons mercury standard stock solution 1.0mL in 100mL flask, add nitric acid 2mL, with water to volume, Is 10μg/mL. Then it was diluted to 100ng/mL mercury standard solution, this solution is valid 60d.

5 Instruments

5.1 pairs of channel Atomic Fluorescence Spectrometer. 5.2 microwave digestion (digestion with high pressure tank). Step 6 Analysis 6.1 Sample Pretreatment 6.1.1 Sampling and sample preparation process, should be taken not to sample contamination. 6.1.2 The sample should be stored in airtight and dry container. 6.2 Sample Microwave Digestion Weigh 0.5g sample in the digestion tank, add 3mL of nitric acid and hydrogen peroxide 1mL, according to Table 1 after the end of the digestion procedure, remove spent DI water to 25mL; while doing a reagent blank test. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 23869-2009_English be delivered?

Answer: Upon your order, we will start to translate GB/T 23869-2009_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 23869-2009_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 23869-2009_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.