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sophiewy

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[求助] 关于一种Sartorius filter paper的问题

最近看一篇文献,是介孔材料复合量子点的研究。实验方案中有一句:A 388 grade Sartorius filter paper with a thickness of 0.14 ± 0.01 mm was used as a porous matrix. This filter paper is ashless and free of any residual acids.
请教一下,我对滤纸了解不多,只知道滤纸有中速、慢速、快速。这个388 grade的滤纸是一种什么样的滤纸?孔径又是什么大小分布?滤纸是怎么分等级的呢?
谢谢大家的解惑。

原文:Litvin, A.P., et al., PbS Quantum Dots in a Porous Matrix: Optical Characterization. Journal of Physical Chemistry C, 2013. 117(23): p. 12318-12324.
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