GB/T 8143-2008 English PDFUS$489.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 8143-2008: Test methods of lac products Status: Valid GB/T 8143: Historical versions
Basic dataStandard 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65.020 Word Count Estimation: 21,239 Date of Issue: 2008-12-31 Date of Implementation: 2009-09-01 Older Standard (superseded by this standard): GB/T 8143-1987 Quoted Standard: GB/T 601-2002; GB/T 603-2002; GB/T 6682-1992 Regulation (derived from): National Standard Approval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 ContentsIntroduction 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 15ForewordThis 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 method1 ScopeThis 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 referencesThe 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. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 8143-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 8143-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 8143-2008_English with my colleagues?Answer: Yes. 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