24小时热门版块排行榜    

北京石油化工学院2026年研究生招生接收调剂公告
查看: 5039  |  回复: 1

加油邹

铜虫 (小有名气)

[求助] 请问DLS中的PDI(分布系数)是怎么算的,公式是什么

如题
回复此楼

» 猜你喜欢

» 本主题相关价值贴推荐,对您同样有帮助:

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

refnew

专家顾问 (知名作家)


【答案】应助回帖

★ ★ ★ ★ ★
感谢参与,应助指数 +1
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
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 加油邹 的主题更新
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 315分求调剂 +6 26考研上岸版26 2026-03-26 6/300 2026-03-27 19:54 by WYUMater
[考研] 266求调剂 +11 阳阳哇塞 2026-03-27 12/600 2026-03-27 17:56 by yu221
[考研] 352分 化工与材料 +3 海纳百川Ly 2026-03-27 3/150 2026-03-27 17:18 by 杨杨杨紫
[考研] 一志愿 西北大学 总分282 英语一62 求调剂 +7 18419759900 2026-03-25 8/400 2026-03-27 16:38 by 18419759900
[考研] 085600,材料与化工321分,求调剂 +9 大馋小子 2026-03-27 9/450 2026-03-27 14:30 by mmm just
[考研] 0856材料化工调剂 总分330 +8 zhubinhao 2026-03-27 8/400 2026-03-27 11:46 by Wushiqi17
[考研] 求调剂 +3 刘柯@ 2026-03-24 4/200 2026-03-27 11:28 by shangxh
[硕博家园] 北京林业大学硕导招生广告 +6 kongweilin 2026-03-26 8/400 2026-03-27 10:18 by FF_16
[考研] 求调剂 +6 林之夕 2026-03-24 6/300 2026-03-27 08:38 by hypershenger
[考研] 081200-11408-276学硕求调剂 +3 崔wj 2026-03-26 3/150 2026-03-27 07:58 by chemisry
[考研] 304材料求调剂 +4 钟llll 2026-03-26 4/200 2026-03-27 03:42 by wxiongid
[考研] 调剂求收留 +7 果然有我 2026-03-26 7/350 2026-03-27 00:26 by wxiongid
[考研] 333求调剂 +6 wfh030413@ 2026-03-23 6/300 2026-03-26 22:45 by 学员8dgXkO
[考研] 325求调剂 +3 Aoyijiang 2026-03-23 3/150 2026-03-26 20:46 by 不吃魚的貓
[考研] 329求调剂 +5 1() 2026-03-22 5/250 2026-03-26 20:40 by fmesaito
[考研] 318求调剂 +5 plum李子 2026-03-21 8/400 2026-03-25 09:26 by aa331100
[考研] B区考研调剂 +4 yqdszhdap- 2026-03-22 5/250 2026-03-25 08:51 by baoball
[考研] 求调剂 +6 研研,接电话 2026-03-24 7/350 2026-03-24 17:01 by barlinike
[考研] 361求调剂 +3 Glack 2026-03-22 3/150 2026-03-23 22:03 by fuyu_
[考研] 一志愿东华大学控制学硕320求调剂 +3 Grand777 2026-03-21 3/150 2026-03-21 19:23 by 简之-
信息提示
请填处理意见