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WS/T 88-2012 English PDF

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WS/T 88-2012: Method for determination of total fluoride in coal and soil. Pyrohydrolysis-ion selective electrode method
Status: Valid

WS/T 88: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
WS/T 88-2012English209 Add to Cart 3 days [Need to translate] Method for determination of total fluoride in coal and soil. Pyrohydrolysis-ion selective electrode method Valid WS/T 88-2012
WS/T 88-1996English239 Add to Cart 2 days [Need to translate] Method for determination of total fluorine in coal and soil. Combustion-bydrolysis-ion selective electrode method Obsolete WS/T 88-1996

PDF similar to WS/T 88-2012


Standard similar to WS/T 88-2012

GBZ 57   GB/T 31989   WS/T 90   WS/T 87   WS/T 89   

Basic data

Standard ID WS/T 88-2012 (WS/T88-2012)
Description (Translated English) Method for determination of total fluoride in coal and soil. Pyrohydrolysis-ion selective electrode method
Sector / Industry Health Industry Standard (Recommended)
Classification of Chinese Standard C61
Classification of International Standard 11.020
Word Count Estimation 8,885
Older Standard (superseded by this standard) WS/T 88-1996
Quoted Standard GB 475; GB/T 19494.1; NY/T 1121.1
Regulation (derived from) ?Health-Communication (2012) 20; Industry Standard Filing Announcement 2013 No.1 (Total No.157)
Issuing agency(ies) National Health and Family Planning Commission of the People's Republic of China
Summary This standard specifies the samples were treated with hot water solution using ion selective electrode measured coal samples or soil samples of the total fluorine content approach. This standard applies to the determination of total fluorine content of va

WS/T 88-2012: Method for determination of total fluoride in coal and soil. Pyrohydrolysis-ion selective electrode 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.
Method for determination of total fluoride in coal and soil. Pyrohydrolysis-ion selective electrode method ICS 11.020 C61 People's Republic of China health industry standards Replacing WS/T 88-1996 Determination of total fluorine in coal and soil High temperature pyrolysis - ion selective electrode method Posted on.2012-11-28 2013-05-01 Implementation Ministry of Health of People's Republic of China released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces WS/T 88-1996 "Determination of total fluorine in coal and soil combustion hydrolysis - ion-selective electrode method." This standard compared with WS/T 88-1996 main changes are as follows. --- The original standard name in the "burning hydrolysis" to "hot pyrolysis"; --- Coal pyrolysis temperature from 1000 ℃ to 1100 ℃; --- Clear the day before the thermal hydrolysis system of quartz combustion tube and condenser tube cleaning conditions; --- Replace quartz sand with the original standard silica powder; --- The original standard writing format, some symbols and units of expression in accordance with the requirements of national standards were modified. This standard is proposed by the Ministry of Health endemic disease standard professional committee. This standard was drafted. China CDC endemic disease control center, Guizhou Provincial Center for Disease Control and Prevention, Nanchang University. The main drafters of this standard. in the light before, winter, Wu on behalf of amnesty, Zhang Nianheng, Wang Wei. Determination of total fluorine in coal and soil High temperature pyrolysis - ion selective electrode method

1 Scope

This standard specifies the treatment of high temperature pyrolysis of samples, the use of ion selective electrode Determination of coal samples or soil samples total fluorine The amount of method. This standard applies to all types of coal and soil samples Determination of total fluorine content.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB 475 commercial coal samples taken by hand GB/T 19494.1 Coal mechanized sampling - Part 1. Sampling methods NY/T 1121.1 Soil Testing Part 1. Collection, Handling and Storage of Soil Samples

3 principle

Coal or soil samples were mixed with quartz sand and burned and hydrolyzed in an oxygen-steam stream at 1100 ° C. Fluorine is converted to fluorine in the sample Hydrogen or other fluorine-containing volatile compounds, condensed by sodium hydroxide solution to absorb the ion-selective electrode Determination of fluorine content.

4 Reagents and materials

4.1 Reagent requirements The standard chemical reagents used in addition to sodium fluoride need superior grade pure (GR), the other reagents are used analytical grade (AR), the water used to go Ionized water, 25 ℃ when the conductivity is not greater than 0.10mS/m. 4.2 sodium fluoride standard solution 4.2.1 sodium fluoride standard stock solution Accurately weighed pre-dried at 120 ℃ 2h 0.2210g of sodium fluoride in a beaker, dissolved in water, water, sodium fluoride solution all Wash into 100mL volumetric flask, add water, shake, transfer to polyethylene plastic bottles, placed in the refrigerator. This stock solution contains per milliliter Fluorine 1.000 mg. 4.2.2 sodium fluoride standard working solution Accurately draw 1.0mL sodium fluoride standard stock solution in 100mL volumetric flask. Add water, shake, stored in polyethylene plastic bottles. This solution contains 10.0μg of fluoride per ml.

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