Fecha registrada: June 19 2014

Duration: 53 minutes 35 seconds

Selecting the appropriate optical properties for particle size distribution measurement by laser diffraction can appear to be a difficult task, especially when characterizing unknown or mixed materials. In this webinar, we describe the available optical models and their recommended applications. We also describe experimental and empirical techniques available for optical property determination, and how these techniques can be applied to generate accurate and reproducible particle size distribution results.

Table of contents
1. Masterclass 4: Configuring optical parameters for laser diffraction particle size analysis
01:05
2. Masterclass 4: Configuring optical parameters for laser diffraction particle size analysis
01:03
3. The laser diffraction masterclass
01:31
4. Laser diffraction measurement process
01:07
5. Overview
01:28
6. What does laser diffraction measure
00:48
7. What does an optical model do?
01:08
8. Where do we use the optical model?
01:58
9. Scattering models: Mie Theory
00:39
10. Scattering models: Mie Theory
00:56
11. Scattering models: Fraunhofer approximation
01:17
12. Comparing the results of the scattering models
01:27
13. Mie vs Fraunhofer: Data quality advice
01:24
14. Mie vs Fraunhofer: Data quality advice
00:25
15. Configuring optical parameters
00:44
16. Which optical properties are required?
01:39
17. Determining the refractive index
00:58
18. Refractometer methods: Solution example
01:04
19. Refractometer methods: Solution example
01:10
20. Microscopy methods: Becke lines
00:54
21. Microscopy methods: Becke lines
00:56
22. Index matching: Quartz particles (RI = 1.544)
01:44
23. Empirical methods
00:49
24. Empirical methods: calculations from structure
01:23
25. The imaginary refractive index (or absorption)
01:47
26. Absorption: Volume concentration method
01:20
27. Verifying optical properties
00:33
28. Using the fit report
00:52
29. Assessing the data fit: Refractive index
00:47
30. Assessing the data fit: Absorption
01:07
31. Example of assessing the data fit
00:54
32. Assessing the fit using 1.4/0.01
01:49
33. Using trend graphs to a range of refractive indices
00:56
34. Assessing the fit using 1.54/0.01
00:41
35. Looking at the results
00:52
36. The Optical Property Optimiser
00:38
37. Video miniguides: Optical property optimiser
00:29
38. Software Demo Video
02:38
39. Video miniguides: Optical property optimiser
00:14
40. Method transferMS2000 emulation model
00:27
41. Samples at the edge of the dynamic range
01:04
42. Non-spherical particles
00:41
43. Conclusions
01:41
44. Contact Information
06:28