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北京石油化工学院2026年研究生招生接收调剂公告
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加油邹

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[求助] 请问DLS中的PDI(分布系数)是怎么算的,公式是什么

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【答案】应助回帖

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加油邹: 金币+5, 有帮助, 有计算的公式吗?谢谢 2012-05-25 08:08:19
Polydispersity Index

This index is a number calculated from a simple 2 parameter fi t to the
correlation data (the cumulants analysis). The Polydispersity Index is
dimensionless and scaled such that values smaller than 0.05 are rarely
seen other than with highly monodisperse standards. Values greater
than 0.7 indicate that the sample has a very broad size distribution and
is probably not suitable for the dynamic light scattering (DLS) technique.
The various size distribution algorithms work with data that falls between
these two extremes. The calculations for these parameters are defi ned in
the ISO standard document 13321:1996 E and ISO 22412:2008.
2楼2012-05-11 16:27:24
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