ISO 9277:2010 用气体吸附测定固态物质比表面积 BET法

标准编号：ISO 9277:2010

中文名称：用气体吸附测定固态物质比表面积 BET法

英文名称：Determination of the specific surface area of solids by gas adsorption — BET method

发布日期：2010-09

标准范围

ISO 9277:2010规定了通过根据Brunauer、Emmett和Teller（BET）方法测量物理吸附气体的量来测定分散（例如纳米粉末）或多孔固体的整体比表面积和内表面积。它考虑了国际纯化学和应用化学联合会（IUPAC）1984年和1994年的建议。BET法仅适用于II型（分散、无孔或大孔固体）和IV型（介孔固体，孔径在2 nm和50 nm之间）的吸附等温线。未检测到无法进入的气孔。BET法不能可靠地应用于吸收测量气体的固体。微孔材料（I型等温线）的比表面积测定策略见附录。

ISO 9277:2010 specifies the determination of the overall specific external and internal surface area of disperse (e.g. nano-powders) or porous solids by measuring the amount of physically adsorbed gas according to the Brunauer, Emmett and Teller (BET) method. It takes account of the International Union for Pure and Applied Chemistry (IUPAC) recommendations of 1984 and 1994.The BET method is applicable only to adsorption isotherms of type II (disperse, nonporous or macroporous solids) and type IV (mesoporous solids, pore diameter between 2 nm and 50 nm). Inaccessible pores are not detected. The BET method cannot reliably be applied to solids which absorb the measuring gas.A strategy for specific surface area determination of microporous materials (type I isotherms) is described in an annex.

标准预览图