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GB/T 16416-2007: Method of extraction for the determination of sodium and potassium in brown coal soluble in dilute hydrochloric acid
Status: Valid GB/T 16416: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 16416-2007 | English | 139 |
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Method of extraction for the determination of sodium and potassium in brown coal soluble in dilute hydrochloric acid
| Valid |
GB/T 16416-2007
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| GB/T 16416-1996 | English | 199 |
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Method of extraction for the determination of sodium and potassium in brown coal soluble in dilute hydrochloric acid
| Obsolete |
GB/T 16416-1996
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PDF similar to GB/T 16416-2007
Basic data | Standard ID | GB/T 16416-2007 (GB/T16416-2007) | | Description (Translated English) | Method of extraction for the determination of sodium and potassium in brown coal soluble in dilute hydrochloric acid | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D21 | | Classification of International Standard | 73.040 | | Word Count Estimation | 5,564 | | Date of Issue | 2007-11-01 | | Date of Implementation | 2008-06-01 | | Older Standard (superseded by this standard) | GB/T 16416-1996 | | Quoted Standard | GB 474 | | Adopted Standard | ISO 1952-1976, NEQ | | Regulation (derived from) | National Standard Approval Announcement 2007 No.12 (Total No.112) | | 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 extraction of coal soluble in dilute hydrochloric acid, sodium and potassium. This standard applies to lignite. | GB/T 16416-2007: Method of extraction for the determination of sodium and potassium in brown coal soluble in dilute hydrochloric acid
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Method of extraction for the determination of sodium and potassium in brown coal soluble in dilute hydrochloric acid
ICS 73.040
D21
National Standards of People's Republic of China
Replacing GB/T 16416-1996
Coal soluble in dilute hydrochloric acid, sodium and potassium
Extraction method determination
(ISO 1952. 1976, Browncoalslignites-Methodof
andpotassiumsolubleindilutehydrochloricacid, NEQ)
Posted 2008-06-01 2007-11-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard and ISO 1952. 1976 "lignite coal and firewood --- dissolved in dilute hydrochloric acid, sodium and potassium extraction method for the determination" corresponds to its consistency
Not equivalent. The main differences are.
--- Normative references differ (see Chapter 2), this standard is cited Chinese national standard;
--- Precision different (Chapter 9 of this standard, ISO 1952. 1976 in Chapter 8), this standard repeatability limit and ISO 1952.
1976 different reproducibility critical difference is not given.
This standard replaces GB/T 16416-1996 "method of extracting coal soluble in dilute hydrochloric acid, sodium and potassium determination using."
This standard compared with GB/T 16416-1996, the major change is made to modify the text and format.
The standard proposed by China Coal Industry Association.
This standard by the National Standardization Technical Committee of Coal.
This standard was drafted. CCRI coal analysis laboratory.
The main drafters of this standard. Shi Yuying, Zhang Ke Rui, Zhou Yiqun.
This standard replaces the previous version of the release of case.
GB/T 16416-1996.
Coal soluble in dilute hydrochloric acid, sodium and potassium
Extraction method determination
1 Scope
This standard specifies the method for the extraction of coal soluble in dilute hydrochloric acid, sodium and potassium.
This standard applies to lignite.
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, undated reference documents, the latest versions apply to this standard.
GB 474 coal sample preparation
3 PRINCIPLE OF THE METHOD
With boiling 0.005mol/L dilute hydrochloric acid and extracted directly in the form of humic acid salt or inorganic alkali metal is present as sodium, potassium from the coal samples,
Then any accurate method of determining a solution of sodium and potassium.
4 Reagents
4.1 hydrochloric acid solution. Ba (HCl) = 0.005mol/L, amount of 0.4mL hydrochloric acid (GB/T 622) diluted with water to 1L, shake spare.
4.2 ethanol (GB/T 679). 95% (volume fraction), AR.
5 Equipment
5.1 flame atomic absorption spectrophotometer or photometer.
5.2 Analysis of balance. a sense of the amount of 0.1mg.
5.3 Electric board. voltage is adjustable.
5.4 Laboratory centrifuges.2000r/min.
5.5 polyethylene tube. 80mL ~ 100mL.
5.6 polyethylene bottles. minimum capacity 250mL.
5.7 volumetric flask. 250mL.
5.8 conical flask. 250mL.
5.9 long-necked funnel.
Preparation 6 samples
Air-dried coal sample, stored in a covered container in preparation according to GB 474 less than 0.2mm in size and capacity of the container is filled to 80%
the above.
7 Procedure
Weigh about 1.5g (weighing accuracy of 0.0002g) coal samples in a conical flask, wetted with ethanol 3mL added 100mL of hydrochloric acid solution, and the thing
Hot plate preheated slow boil 15min, remove the cooling, the extract and move all the residue of polyethylene centrifuge tube, and
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