标准编号：ISO 22262-2:2014
中文名称：空气质量 散装材料 第1部分：石棉重量的定量测定和显微镜法
英文名称：Air quality — Bulk materials — Part 2: Quantitative determination of asbestos by gravimetric and microscopical methods
发布日期：2014-09
标准范围
This part of ISO 22262 specifies procedures for quantification of asbestos mass fractions belowapproximately 5 %, and quantitative determination of asbestos in vermiculite, other industrial mineralsand commercial products that incorporate these minerals.This part of ISO 22262 is applicable to the quantitative analysis of:a) any material for which the estimate of asbestos mass fraction obtained using ISO 22262-1 is deemedto be of insufficient precision to reliably classify the regulatory status of the material, or for whichit is considered necessary to obtain further evidence to demonstrate the absence of asbestos;b) resilient floor tiles, asphaltic materials, roofing felts and any other materials in which asbestos isembedded in an organic matrix;c) wall and ceiling plasters, with or without aggregate;d) mineral products such as wollastonite, dolomite, calcite, talc or vermiculite, and commercialproducts containing these minerals.This part of ISO 22262 is primarily intended for application to samples in which asbestos has beenidentified at estimated mass fractions lower than approximately 5 % by weight. It is also applicable tosamples that may contain asbestos at low mass fractions incorporated into matrix material such thatmicroscopical examination of the untreated sample is either not possible or unreliable. An annex givesrecommendations for the analysis of each type of material that may contain asbestos.It is not the intent of ISO 22262 to provide instruction in the fundamental microscopical and analyticaltechniques.
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