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 calculations of particle diameters d(0.9)		  New Topic  Reply to Topic
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ghirigori85

Italy
2 Posts
Posted - 09/05/2014 :  03:56:57 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hi guys,
i need to elaborate data concerning particle size and size distribution.
in particular i need to calculate d(0.9): the particle diameter at 90 % of the undersized particle distribution curve.
do you know if it is possible with OriginPro8? and how?
in case of yes, i need also to calculate d(0.5), d(0.1) and the span.
thank you

ghirigori85

Origin Ver. and Service Release (Select Help-->About Origin): OriginPro8 SR4 v8.0951 (B951)
Operating System: windows 7

SeanMao

China
288 Posts
Posted - 09/05/2014 :  05:49:33 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

I think Weibull probability plot (supported since 9.0) is what you are looking for which can be applied to describe particle size distribution. In Weibull probability plot, the X axis corresponds to particle size and Y axis corresponds the probability.
Follow the tutorial below to make a Weibull probability plot:
http://www.originlab.com/doc/Tutorials/Weibull-Probability-Plot
then you can use the output data to interpolate the value you want.

I am sorry but it is not supported in Origin 8.0.

Regards!

Sean

OriginLab Tech. Service
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ghirigori85

Italy
2 Posts
Posted - 09/05/2014 :  11:38:39 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Thank you Sean for the information.
i try using Plot, Hystogram + probabilities and then on the "cumulative counts" graph using the Line plot in some way i can get the information i was looking for (diameter in corrispondence of counts 90).

regards

ghirigori85
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