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GB/T 22104-2008 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 22104-2008: Soil quality -- Analysis of fluoride -- Ion selective electrometry
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22104-2008	139	Add to Cart	3 days	Soil quality -- Analysis of fluoride -- Ion selective electrometry	Valid

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Basic data

Standard ID: GB/T 22104-2008 (GB/T22104-2008)
Description (Translated English): Soil quality -- Analysis of fluoride -- Ion selective electrometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Z18
Classification of International Standard: 13.080.05
Word Count Estimation: 6,675
Date of Issue: 2008-06-27
Date of Implementation: 2008-10-01
Regulation (derived from): Announcement of Newly Approved National Standards No. 10 of 2008 (total 123)
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 determination of fluoride in soil ion selective electrode method, This standard applies to ion- selective electrode method for the determination of fluoride content in the soil, the standard method detection limit of 2. 5��g.

GB/T 22104-2008: Soil quality -- Analysis of fluoride -- Ion selective electrometry

---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.
Soil quality. Analysis of fluoride. Ion selective electrometry ICS 13.080.05 Z18 National Standards of People's Republic of China Determination of soil quality fluoride Ion Selective Electrode Posted 2008-06-27 2008-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is proposed and managed by the People's Republic of China Ministry of Agriculture. This standard was drafted. Ministry of Agriculture, the Environmental Protection Institute, Guangxi agricultural environment monitoring station. The main drafters of this standard. Liu Chi, XU Ya-ping, war Xinhua, Cai Yanming, Liu Yan, Liu Ming. Determination of soil quality fluoride Ion Selective Electrode

1 Scope

This standard specifies the determination of soil fluoride ion selective electrode method. This standard applies to the determination of fluoride content in soil ion selective electrode method. The detection limit of this method is standard 2.5μg. Principle 2 When the fluorine electrode and the test solution in contact with the electrode potential relationship solution of fluorine ion activity generated obey the Nernst (Nernst) equation. E = E0-Slog Ba F- Where. E --- measured electrode potential; E0 --- reference potential (fixed value) than the electrode; S --- slope fluorine electrode; ---- F Ba concentration of fluoride ions in solution. When the control test solution total ionic strength is constant, it changes with the electrode potential of fluorine ion concentration in the test solution varies, E and Ba F- log linear relationship. That will generally total ionic strength buffer solution was added, to eliminate or reduce the ion concentrations of different sizes gravity Difference to the activity coefficient is 1, with a concentration in place of activity. Samples with sodium hydroxide at high temperatures melted with hot water extraction, and adding an appropriate amount of hydrochloric acid, so that there is interference cations into insoluble Hydroxide, after removing the clarified solution is adjusted to a near neutral pH, under conditions of total ionic strength buffer solution exists, the direct use of electrical fluoro Pole method.

3 Reagents

The reagents used in this standard, unless otherwise indicated, reagents were of analytical grade, the water is deionized water or fluorine-free distilled water. 3.1 (1 + 1) hydrochloric acid solution. 3.2 Sodium hydroxide (solid). tabular grains. 3.3 0.2mol/L sodium hydroxide solution. Weigh 0.80g of sodium hydroxide, dissolved in water, dilute with water to 100mL. 3.4 0.04% bromocresol purple indicator. bromocresol purple weighed 0.10g, 9.25mL dissolved in sodium hydroxide solution (3.3), diluted with water to 250mL. 3.5 total ionic strength buffer solution (TISAB) 3.5.1 1mol/L sodium citrate (TISABⅠ). weigh 294g sodium citrate (Na3C6H5O7 · 2H2O) in 1000mL beaker In about 900mL of water was added to dissolve, using hydrochloric acid solution (3.1) pH to 6.0 to 7.0, transferred to 1000mL volumetric flask, diluted with water To the mark, shake. 3.5.2 1mol/L hexamethylenetetramine -1mol/L potassium nitrate -0.15mol/L Tiron (TISABⅡ). Weigh 140.2g six Methylene tetraamine [(CH2) 6N4], 101.1g potassium nitrate (KNO3) and 49.8g Tiron (C6H4Na2O8S2 · H2O), add water-soluble Solution, adjusting the pH to 6.0 to 7.0, into 1000mL volumetric flask, dilute to the mark with water, shake well. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 22104-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 22104-2008_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 22104-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 22104-2008_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 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.