全自动比表面积及孔隙度分析仪

DA计算中选择合适的K值

When using theMicropore software to reduce isothermal data for the Dubinin-Astakhov micropore distribution, the K value must be selected properly depending on the adsorptive in use.

使用 “Max Volume Increment” 选项优化BJH孔径分布

通常使用气体吸附法来表征材料的孔径分布。对于具有2-50纳米孔径的材料，BJH法的最常使用计算孔径分布的方法。为了得到较好的结果，需要足够的等温吸附数据点。然而，在测试前是很难预知在某一相对压力下的吸附量，这可能会造成BJH计算孔径分布时数据点不足。 美国麦克仪器公司的物理吸附仪的软件中置有 “Max Volume Increment”选项，该选项的作用是样品的吸附量增量达到了“Max Volume Increment”选项的设定值，则采集该数据点，达到自动增加取点的功能。

比表面积测量在药物材料上的应用

In the pharmaceutical world, particle size analysis has traditionally been the method of choice to “characterize” raw materials. Beginning with sieve analyses all the way to more current technologies like laser light scattering, this physical characterization measurement has been used to set incoming raw material specifications, help determine which excipients will be used in a formulation, and troubleshoot product performance issues such as dissolution. While particle size analysis is, without a doubt, an important piece of the puzzle, it is exactly that – a piece. Other measurements can provide essential and useful information as well and, when paired with other techniques, assist the pharmaceutical scientist to more fully characterize their Active Pharmaceutical Ingredients (API) and excipient materials. Among these techniques is the measurement of surface area.