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GB/T 8143-2008: Test methods of lac products
Status: Valid GB/T 8143: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 8143-2008 | English | 489 |
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Test methods of lac products
| Valid |
GB/T 8143-2008
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| GB/T 8143-1987 | English | 639 |
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5 days [Need to translate]
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Methods of testing lac products
| Obsolete |
GB/T 8143-1987
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PDF similar to GB/T 8143-2008
Basic data | Standard ID | GB/T 8143-2008 (GB/T8143-2008) | | Description (Translated English) | Test methods of lac products | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B72 | | Classification of International Standard | 65.020 | | Word Count Estimation | 21,239 | | Date of Issue | 2008-12-31 | | Date of Implementation | 2009-09-01 | | Older Standard (superseded by this standard) | GB/T 8143-1987 | | Quoted Standard | GB/T 601-2002; GB/T 603-2002; GB/T 6682-1992 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.27 (Total No.140) | | 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 test methods lac products. This standard applies to particles shellac, shellac, bleaching shellac, dewaxed shellac, bleaching dewaxed shellac, military shellac, bleached shellac and refined bleached shellac and other lac products. | GB/T 8143-2008: Test methods of lac products---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.
Test methods of lac products
ICS 71.040.99
B72
National Standards of People's Republic of China
Replacing GB/T 8143-1987
Shellac product testing method
Posted 2008-12-31
2009-03-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
1 Scope 1
2 Normative references 1
3 Determination of volatile matter (water) 1
4 Determination of hot ethanol insolubles 2
Determination of color index 4 5
Determination of wax 6 6
7 rosin test (Liebermann-Storch reaction) 7
8 orpiment examination 7
Determination of ash 9 7
Determination and water soluble extracts were acid 10 thereof, the basic test 8
11 thermal curing time (thermal life) Determination of 9
Determination of acid value 12 10
Determination of iodine value 13 10
14 11 Determination of the chlorine content
15 Determination of cold ethanol solubles 12
16 Determination of softening point 13
Determination of inorganic acids 17 15
Free chlorine or peroxide test 18 15
Foreword
This standard replaces GB/T 8143-1987 "lac product testing methods."
This standard compared with GB/T 8143-1987, the main changes are as follows.
--- Increasing the normative references;
--- Modify the volatiles (water) The provisions of the original method of measuring the drying temperature and time, the original method two to adjust to a method;
--- Hot ethanol insolubles modified the original method for measuring a predetermined measurement program II, the original method two to adjust to a method;
--- Increased the determination of a color index, adjusted to the original method of Method II;
--- Modify the iodine value measurement measurement program provisions;
--- Modified acid value measurement provisions of the indicator.
This standard was proposed by the State Forestry Administration.
The standard by the China Academy of Forestry Forest Research Institute of Chemical Industry.
This standard is drafted by. Chinese Academy of Forestry Forest Research Institute of Chemical Industry.
Participated in the drafting of this standard. Forest Chemical Co., Ltd. Kunming, Kunming Su Biological Technology Co., Ltd., Yunnan Yunxian busy Huai Lin
Of the factory.
The main drafters of this standard. Wang Yongmei, Chen Jia-hong, WU Dong-mei, Wu Song.
This standard replaces the standards previously issued as follows.
--- GB/T 8143-1987.
Shellac product testing method
1 Scope
This standard specifies the test methods lac products.
This standard applies to particles shellac, shellac, decolorized shellac, dewaxed shellac, dewaxed shellac decolorized, military shellac, bleached shellac
Refined bleached shellac and shellac and other products.
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.
Preparation of GB/T 601-2002 Chemical Reagent standard titration solution
GB/T 603-2002 Chemical Reagent Test Methods for preparing reagents and products used
Laboratory use specifications and test methods GB/T 6682-1992 Analysis
3 Determination of volatile matter (water) of
3.1 Method One
3.1.1 Principle
Determination of volatile matter (water) is treating the sample under specified conditions, calculated according to the sample weightlessness volatile matter content (moisture) of.
3.1.2 Instruments
3.1.2.1 weighing bottle. diameter 5cm, height 3cm.
3.1.2.2 dryer. diameter 15cm.
3.1.2.3 electric oven blast.
3.1.3 measurement program
In advance at 60 ℃ ± 1 ℃ weighed by sieve pore diameter of about 0.4mm (equivalent to 40 mesh) sample of about 2g, accurate to 0.1mg, placed
Constant weight weighing bottle, placed in 60 ℃ ± 1 ℃ oven dried 2h, remove and let cool to room temperature silica gel desiccator and weighed.
3.1.4 Calculation Results
Moisture mass fraction X1 and its value is expressed in%, according to equation (1).
X1 =
M1 2 m1 1-
M1 × 100
(1)
Where.
M1 --- weighing bottle and the sample values \u200b\u200bbefore drying mass in grams (g);
Numerical mass m1 2 --- weighing bottle and sample after drying, in grams (g);
--- Value m1 mass of the sample in grams (g).
The absolute difference between two independent test results obtained under repeatability conditions is not more than 0.2%. The arithmetic mean of the determination
result.
3.2 Method Two
3.2.1 Principle
3.1.1.
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