ISO 2596:2006 铁矿石 分析试样中吸湿的测定 重量法、卡尔费舍尔（Karl fisher）法和失重法

标准编号：ISO 2596:2006

中文名称：铁矿石 分析试样中吸湿的测定 重量法、卡尔费舍尔（Karl fisher）法和失重法

英文名称：Iron ores — Determination of hygroscopic moisture in analytical samples — Gravimetric, Karl Fischer and mass-loss methods

发布日期：2006-05

标准范围

This International Standard specifies the following four test methods for the determination of the hygroscopic moisture content of test samples:Method 1 — Gravimetric method;Method 2 — Karl Fischer volumetric method;Method 3 — Karl Fischer coulometric method;Method 4 — Mass-loss method.Any of these methods is applicable wherever the analytical value of a chemical constituent is to be calculated to a dried sample basis in the following ore types.a)Processed ores containing metallic iron (direct reduced iron).b)Natural or processed ores in which the sulfur content is greater than 0,2 % (mass fraction).c)Natural or processed ores in which the combined water is greater than 2,5 % (mass fraction).Any of these methods is applicable to a concentration range of 0,05 % (mass fraction) to 4,5 % (mass fraction) hygroscopic moisture.NOTE 1 Where the reportable moisture content of a commercial consignment of ore is required, the procedure in ISO 3087 is used.NOTE 2 With natural or processed ores outside the field of application specified in a), b) or c), a determination of a constituent at any level of concentration may be conducted using any of these methods, or as specified in ISO 7764.NOTE 3 Alternatively, the loss or ignition content may be measured as an estimate of the combined water content.

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