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GB/T 8142-2008: Methods of sampling lac products
Status: Valid GB/T 8142: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 8142-2008 | English | 169 |
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3 days [Need to translate]
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Methods of sampling lac products
| Valid |
GB/T 8142-2008
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| GB/T 8142-1987 | English | 199 |
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Methods of sampling lac products
| Obsolete |
GB/T 8142-1987
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PDF similar to GB/T 8142-2008
Basic data | Standard ID | GB/T 8142-2008 (GB/T8142-2008) | | Description (Translated English) | Methods of sampling lac products | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B72 | | Classification of International Standard | 65.020 | | Word Count Estimation | 7,747 | | Date of Issue | 2008-12-31 | | Date of Implementation | 2009-03-01 | | Older Standard (superseded by this standard) | GB/T 8142-1987 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.27 (Total No.140) | | Issuing agency(ies) |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 the sampling methods shellac products, sample preparation and sample preservation. 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 8142-2008: Methods of sampling 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.
Methods of sampling lac products
ICS 65.020
B72
National Standards of People's Republic of China
Replacing GB/T 8142-1987
Lac products sampling methods
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
Foreword
This standard replaces GB/T 8142-1987 "lac products sampling methods."
This standard compared with GB/T 8142-1987, the main changes are as follows.
--- Chapter 1, "Introduction" to "scope", by deleting "other" content;
--- Modify the size requirements for sample preparation;
--- Increased content analysis sample preparation.
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 by the Chinese Academy of Forestry Forest Research Institute of Chemical Industry is responsible for drafting.
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 8142-1987.
Lac products sampling methods
1 Scope
This standard specifies the method of sampling lac products, sample preparation and sample storage.
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 Sampling method
2.1 the number of samples collected
Analysis of a sample to deal with the entire batch adequate representation. Test samples with each batch of products should be chosen at random at least 10%
Boxes (bags), a minimum of not less than 5 boxes, up to no more than 25 cases, and had extracted from the unopened original boxes (bags) in different parts.
2.2 lac loose product sampling
General loose lac product samples, available sampling spoon to extract roughly equal numbers of samples from each box (bag) in different parts of the total weight of about
5kg.
2.3 lac caking product sampling
Caking shellac products from different parts of the sample size or split take chisel take samples extracted from each box (bag) is approximately equal to the total weight of about
5kg.
3 Sample Preparation
3.1 laboratory sample
The extracted sample is thoroughly mixed with the quartering points shrink, shrink take two diagonal sample and mix well. And then divided into four equal parts, mix 2 Corner like,
Ground until completely mixed by pore size of about 2mm sieve (equivalent to 10 mesh), and is divided into four equal parts, each about 300g.
3.2 Analysis of samples
3.2.1 laboratory sample taken (3.1) 100g, completely crushed to sieve through the pore diameter of about 0.4mm (equivalent to 40 mesh), in a clean, dry,
Glass jar with a ground, the test used for analysis. Attach a label on the bottle and indicate the manufacturer's name, product name, batch number, date and place of sampling
Points.
3.2.2 laboratory sample taken (3.1) of about 40g, crushed to completely through the sieve pore diameter of about 0.3mm (equivalent to 60 mesh), in a clean, dry
Dry, with a ground glass jar for analysis for inspection. Pasted on the bottle label and indicate the manufacturer's name, product name, batch number, date of sampling
And location.
3.2.3 laboratory sample taken (3.1) of about 10g, crushed to completely through the sieve pore diameter of about 0.2mm (equivalent to 80 mesh), in a clean, dry
Dry, with a ground glass jar for analysis for inspection. Pasted on the bottle label and indicate the manufacturer's name, product name, batch number, date of sampling
And location.
4 Sample Storage
The remaining 150g laboratory sample (3.1) in a clean, dry jars, sealed, should be pasted on the bottle label, label content
With 3.2.1, save spare.
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