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GB/T 10741-2008: Pulps -- Determination of alcohol-benzene soluble
Status: Valid GB/T 10741: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 10741-2008 | English | 149 |
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Pulps -- Determination of alcohol-benzene soluble
| Valid |
GB/T 10741-2008
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| GB/T 10741-1989 | English | 199 |
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Pulps--Determination of alcohol-benzene solubles
| Obsolete |
GB/T 10741-1989
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PDF similar to GB/T 10741-2008
Basic data | Standard ID | GB/T 10741-2008 (GB/T10741-2008) | | Description (Translated English) | Pulps -- Determination of alcohol-benzene soluble | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y30 | | Classification of International Standard | 85-010 | | Word Count Estimation | 5,523 | | Date of Issue | 2008-08-19 | | Date of Implementation | 2009-05-01 | | Older Standard (superseded by this standard) | GB/T 10741-1989 | | Quoted Standard | GB/T 462; GB/T 740 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.14 (Total No.127) | | 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 benzene pulp extract of alcohol. This standard applies to all kinds of chemical pulp and semi- chemical pulp. | GB/T 10741-2008: Pulps -- Determination of alcohol-benzene soluble---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.
Pulps. Determination of alcohol-benzene solubles
ICS 85-010
Y30
National Standards of People's Republic of China
Replacing GB/T 10741-1989
Benzyl alcohol was measured pulp extract
Posted 2008-08-19
2009-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 10741-1989 "Pulp alcohol benzene extraction assay."
This standard compared with GB/T 10741-1989, the main changes are as follows.
--- Increasing the foreword;
--- Modify the operation content; cancel filter paper wrap samples increased with cotton filter drain nozzle; cancel solvent evaporated weighing bottle,
Provisions directly evaporated by the end of the bottle, by the oven temperature (105 ± 3) ℃ to (105 ± 2) ℃ (Excerpts Chapter 7);
--- Increasing the normative references (Chapter 2 of this edition);
--- Modification and preparation of the samples (Chapter 6 of this edition);
--- Increase the contents of the report results (Chapter 8 of this edition).
The standard proposed by China National Light Industry Council.
This standard by the National Standardization Technical Committee of the paper industry.
This standard was drafted. Tianjin Institute of Light Industry Technology Paper, Pulp and Paper Research Institute of China.
The main drafters of this standard. Nie Jun red.
This standard replaces the standards previously issued as follows.
--- GB/T 10741-1989.
This standard by the National Standardization Technical Committee is responsible for interpreting the paper industry.
Benzyl alcohol was measured pulp extract
1 Scope
This standard specifies the method for determination of pulp alcohol benzene extractives.
This standard applies to all kinds of chemical pulp and semi-chemical pulp.
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 462 paper, board and pulp - Determination of water sample (GB/T 462-2008, ISO 287. 1985, ISO 638.
1978, MOD)
GB/T 740 pulp samples taken (GB/T 740-2003, ISO 7213. 1981, IDT)
Principle 3
Alcohol extraction with benzene pulp, and then extract was evaporated, dried, weighed, and thus the amount of the residue quantitatively measured.
4 Reagents
Benzyl alcohol mixture. amount of benzene and Analysis Volume 2 1 AR 95% ethanol by volume, and mix.
5 Instruments
General laboratory instruments and
5.1 Soxhlet extractor. Volume extractor should 60mL ~ 120mL, bottle bottom capacity 150mL.
5.2 Analysis of balance. a sense of the amount of 0.0001g.
5.3 constant temperature water bath. a temperature regulator.
5.4 Oven. airy, and has a temperature regulator.
6 Sample and preparation
6.1 Sampling
Pulp samples were taken in accordance with the provisions of GB/T 740's.
6.2 Preparation of the sample
The samples were cut or torn sample size of about 1.5cm × 1.5cm, and mix well. Operation should wear clean gloves, and small
Heart taken to prevent contamination. The prepared samples should be stored in a covered grinding mouth jar.
6.3 Determination of moisture content
Determination of absolute dry matter content of the sample according to GB/T 462.
7 Test procedure
Weighed (5 ± 0.002) g dried sample, first a small group of previously been extracted with benzene alcohol cotton wool into the Soxhlet extractor (5.1) of the liquid discharge
Tube, then sample into a Soxhlet extractor (5.1). The was (105 ± 2) ℃ drying connection and constant weight to the bottom of the bottle on a Soxhlet extractor,
Would be equivalent to 1.5 times the volume of a Soxhlet extractor alcohol mixture of benzene plus bottle in the end, connected to the condenser, the instrument is installed in a constant temperature water bath (5.3)
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