24小时热门版块排行榜    

CyRhmU.jpeg
查看: 5952  |  回复: 6
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

conquerus

铜虫 (正式写手)

[求助] 动态光散射(DLS)中的intensity

用动态光散射测量纳米粒径,然后采用的intensity的结果,如果用英文写出来,应该如何写呢?Size calculation is determined by intensity?这样对吗?
回复此楼

» 猜你喜欢

» 本主题相关商家推荐: (我也要在这里推广)

» 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

jiangcj09

铁杆木虫 (正式写手)

【答案】应助回帖

用Z-average hydrodynamic diameter。
根据Malvern zetasizer的手册:“It is important to note that this mean size (often given the symbol Z or z-average) is an intensity mean. It is not a mass or number mean because it is calculated from the signal intensity.”
所以,根据强度计算得到的粒径,就是z-average size。

手册在这里可以下载:
http://www.nbtc.cornell.edu/faci ... asizer%20Manual.pdf

除此之外,使用DLS结果的时候,需要注意:
Z-average size (also known as the “cumulants mean”)
In dynamic light scattering this is the most important and stable number produced by the technique. This is the size to use if a number is required for quality control purposes.
It will only be comparable with other techniques if the sample is monomodal (i.e. only one peak), spherical and monodisperse (i.e. no width to the distribution), and the sample is prepared in the correct dispersant. In any other case, the Z-average size can only be used to compare results with samples measured in the same dispersant, by the same technique, i.e. by Dynamic Light Scattering (DLS).
6楼2013-04-04 12:25:01
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 conquerus 的主题更新
信息提示
请填处理意见