GB/T 23985-2009 PDF EnglishUS$70.00 · In stock · Download in 9 seconds
GB/T 23985-2009: Paints and varnishes -- Determination of volatile organic compound (VOC) content -- Difference method Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 23985-2009: Paints and varnishes -- Determination of volatile organic compound (VOC) content -- Difference method---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT23985-2009 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 87.040 G 50 GB/T 23985-2009 / ISO 11890-1.2007 Paints and varnishes - Determination of volatile organic compound (VOC) content - Difference method (ISO 11890-1.2007, Paints and varnishes - Determination of volatile organic compound (VOC) content - Part 1.Difference method, IDT) Issued on. JUNE 02, 2009 Implemented on. FEBRUARY 01, 2010 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the PRC; Standardization Administration of the PRC. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 5 4 Principle... 6 5 Required supplementary information... 6 6 Sampling... 7 7 Test procedure... 7 8 Calculation... 8 9 Expression of results... 10 10 Precision... 11 11 Test report... 12 Annex A (Normative) Required supplementary information... 13 Bibliography... 14ForewordThis Standard is identical to the international standard ISO 11890-1.2007 “Paints and varnishes - Determination of volatile organic compound (VOC) content - Part 1.Difference method” (English edition). This Standard is identical to the translation of ISO 11890-1.2007. For ease of use, the editorial changes to this Standard are as follows. - Replace “this International Standard” with “this Standard”; - Delete the Foreword to the international standard; - For other international standards referenced in ISO 11890-1.2007, for those which are identically adopted as Chinese standards, replace corresponding international standards with the Chinese standards; for those which are not identically adopted as Chinese standards, REFERENCE directly the international standards; - Delete “Part 1” in the name of the international standard; - At present, in China, the water content in paints is mostly determined by gas-chromatographic method, so in 7.5, ADD the contents of Note 3. Annex A of this Standard is a normative annex. This Standard was proposed by China Petroleum and Chemical Industry Association. This Standard shall be under the jurisdiction of National Technical Committee 5 on Paints & Pigments of Standardization Administration of China. Drafting organizations of this Standard. CNOOC Changzhou Paint and Coatings Industry Research Institute, Suzhou Sunmun Technology Co., Ltd. Main drafters of this Standard. Ji Junhong, Peng Jufang, Du Changsen. Paints and varnishes - Determination of volatile organic compound (VOC) content - Difference method1 ScopeThis Standard is one of a series of standards dealing with the sampling and testing of paints, varnishes and related products.2 Normative referencesThe following documents contain provisions which, through reference in this Standard, constitute provisions of this Standard. For the dated references, their subsequent amendments (excluding corrections) or revisions do not apply to this Standard. However, the parties who enter into agreement based on this Standard are encouraged to investigate whether the latest editions of these documents are applicable. For undated reference documents, the latest editions apply to this Standard.3 Terms and definitionsFor the purposes of this Standard, the following terms and definitions apply. Mass of the volatile organic compounds present in a coating material, as determined under specified conditions. State of a product when it is mixed in accordance with the manufacturer’s instructions in the correct proportions and thinned, if required, using the correct thinners so that it is ready for application by the approved method.4 PrincipleAfter preparation of the sample, the non-volatile matter content is determined in accordance with GB/T 1725, and the water content is determined using a titration technique employing Karl Fischer reagent in accordance with GB/T 6283.T5 Required supplementary informationFor any particular application, the test method specified in this Standard shall be completed by supplementary information.6 SamplingTake a representative sample of the product to be tested (or of each product in the case of a multi-coat system) as specified in GB/T 3186.7 Test procedureFor single-component products, weigh test portions of the appropriate size (see Table 1 in GB/T 1725-2007) into dishes as specified in GB/T 1725.Proceed in accordance with GB/T 1725.8 CalculationCalculate the VOC content by the method specified in the referring specification. If no particular method is specified, calculate the VOC content by method 1.9 Expression of resultsIf the two results (duplicates) differ by more than the value indicated in 10.2, repeat the procedure.10 PrecisionThe repeatability limit r is the value below which the absolute difference between two single test results, each the mean of duplicates, obtained on identical material by one operator in one laboratory within a short interval of time using the standardized test method, may be expected to lie.11 Test reportThe test report shall contain at least the following information.Annex A(Normative) Required supplementary information The items of supplementary information listed in this annex shall be supplied as appropriate to enable the method to be carried out. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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