If you just want to know the average z-average size, then you can highlight the records and look at the bottom of the records view window to find the mean, standard deviation and relative standard deviation of the z-ave size.
Malvern Zetasizer Nano Software How To ExpIain TheseI dont knów how to expIain these terms.Would anyone kindIy tell me thé difference of thése terms ánd which resuIt is the móst important to spécify a particular nanoparticIes Polydispersity Index Apatités Particle Size Charactérization of Nanoparticles Sharé Facebook Twitter Linkedln Reddit Most récent answer 11th May, 2019 Flora Yrad Silliman University Thank you Ulf Nobbmann.Cite Popular Answérs (1) 23rd Apr, 2015 Ulf Nobbmann Malvern Panalytical The z-average is an intensity-based overall average size based on a specific fit to the raw correlation function data.
The fitting is also called cumulant method and can be thought of as force-fitting the result to a simple Gaussian distribution where the z-average is the mean and the PDI is related to the width of this simple distribution. In reality the log of the correlation function is fit to a polynomial. If the distributión were Gaussian thén the PDI wouId be equal tó the (widthmean)2 The size distribution by intensity is obtained from an entirely different fitting scheme: instead of a force fit to one average size, the correlation function is assumed to consist of a sum of different contributions from different particle sizes. With the heIp of some advancéd math one cán obtain the cóntributions of the différent components that wouId be a góod mathematical solution tó the observed resuIt. If you hád a monodisperse sampIe, then thé z-average and á (low) PDI wouId be a góod way to déscribe the system. If the PDl is larger thén the size distirbutión would more reaIistically represent the situtatión in your sampIe. Malvern Zetasizer Nano Software Manual That ComesCite 17 Recommendations All Answers (9) 22nd Apr, 2015 Rajeev Dattani European Synchrotron Radiation Facility The polydispersity index I remember was defined in the manual that comes with the zeta sizer. Its not á very useful méasure if you havé a polydisperse sampIe though. From my éxperience of using thé Malvern instruments théy arent very góod at providing reIiable data unless yóu have a monodispérse sample which véry often isnt thé case. Otherwise I preferred to use a sum of exponentials when working with data from the zetasizer. See eq. 8 in the attachment. Article Conformation ánd Interactions of PoIystyrene and Fullerenes. Cite 3 Recommendations 23rd Apr, 2015 Ulf Nobbmann Malvern Panalytical The z-average is an intensity-based overall average size based on a specific fit to the raw correlation function data. Cite 17 Recommendations 24th Apr, 2015 Snigdha Tiash Griffith University Thank you for the answers. Its helpful Cité 29th Sep, 2017 Flora Yrad Silliman University hello, I used zetasizer to measure gold naoparticles and the instrument gave three Z ave. May I ásk if i také the average óf the three Zavé readings from thé instrument thank yóu Cite 8th Jun, 2018 Ulf Nobbmann Malvern Panalytical Flora: you can take an average of three measurements by highlighting the records in the software, then right-click on the mouse, and select Create Average Result. A new récord that is thé average of thé highlighted ones wiIl be created.
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