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Thanks for your comment. Ensuring cleanliness of the system is certainly one important factor to getting the best quality data. Fortunately, it is very easy to keep your Mastersizer system measurement ready due to the ease of access it offers for cleaning. With respect to the tubing used for wet dispersion, this can be swapped out for new tubing as frequently as you see fit. But you shouldn’t need to do this often. If you are testing samples where biofilm growth might be an issue, cleaning of the system with a suitable solvent could be an option, especially as the Mastersizer demonstrates very good chemical compatibility. And don’t forget we have exciting software features like Data Quality Guidance to warn you of factors which could be impacting your measurement data.

Hi @jomarcamu7057, yes the Eagon requires an extraction system to remove the fumes. You can either sit it under a extraction hood or connect it directly to an extraction system using supplied extraction pipes.

Thanks for your comment. It’s great to hear that you have recently purchased a Mastersizer 3000! When it comes to transferring methods from the Mastersizer 2000 to the Mastersizer 3000, we have a lot of content on our website to help you. We would recommend the following technical notes and webinar as staring points. Technical Note 1: www.malvernpanalytical.com/en/learn/knowledge-center/technical-notes/tn130912transferingmethodsmastersizer Technical Note 2: www.malvernpanalytical.com/en/learn/knowledge-center/technical-notes/tn130515transfermethodstoms3000 Webinar: www.malvernpanalytical.com/en/learn/events-and-training/webinars/w221115epims3000

Thank you

Glad it helped

Hi, do you mean Mastersizer? Mastersizer uses Laser Diffraction and the video you posted on is around Zetasizer, this uses Dynamic Light Scattering. Both techniques maybe useful in measuring CNT’s - dependent on their size range and agglomeration state. If you can clarify what system you have we can point you in the right direction.

@@MalvernPanalytical Hi, we have Master sizer with EV and MV unit. CNT size is 9.5nm. I have a CNT water dispersion 200ml. Please advise what shall me sample volume and which technique I must use. Many thanks

@@user-vf3mp5nn8l Your expected size of 9.5 nm is below the 10 nm lower limit of the Mastersizer (laser diffraction), but this is well within the capabilities of the Zetasizer (dynamic light scattering). However, aggregation of the CNTs will likely mean you measure sizes larger than 9.5 nm and so the Mastersizer should still be relevant. We cannot advise on volume of sample to be tested as we do not know the concentration etc. Best practice for Mastersizer dictates that you should aim for an obscuration of no more than 5%. As these are small particles, there is a high likelihood of multiple scattering at higher obscuration levels. Try measuring at different obscuration ranges and determine where you see stable sizes versus obscuration - it’s within this range that you should be testing.

@@MalvernPanalytical Many thanks for the reply. The concentration is 1%. please advise the volume of sample.

Hi @user-vf3mp5nn8l I would suggest to contact your local support for more advice.

Hi Andrea. Thanks for the question. Based on your comments, it sounds like you are running a dry analyses and observing a fluctuating obscuration reading during sample feeding. This could potentially be due to the feed rate not being optimised for your sample. You could look at investigating different feed rates to determine if you get a better response. If you are using the Aero S on Mastersizer 3000, the mesh basket and ball bearing aid could also help to pre-disperse any agglomerates in the hopper and smooth the flow in the hopper.

@@MalvernPanalytical Thank you for the response! Yes normally we would change the feed rate to experiment, we actually had it set pretty high-70% with the maximum hopper gap; but we were somewhat bound to following the exact procedure. I wound up decreasing the stabilization time from 0.5 to 0.1 or 0.2 secs before reading occurs and it worked great! 👍🏼

Hi @andreabeyer3187 , we’re really pleased to hear that you have found a route forwards. Happy particle sizing!

You're most welcome

Thanks for your comment! We're thrilled you enjoyed the video! 😄 For citing UA-cam videos in your final thesis, consider following the guidelines provided by your academic institution or referencing style (like APA, MLA). Best of luck with your thesis! 📚✨

Thanks for your comment! We’re glad you found our video helpful. Let us know if you have any other questions or comments.

Thank you for your kind words! We’re glad to hear that our video was helpful. We hope you continue to find our content informative and engaging. 😊

Hi @santoshpatil4354, laser diffraction is ideally suited to spheres / spheroidal, or slightly irregular materials. It will handle most shapes however. Most particles will randomly move in relation to the laser, so we get a volume based response based on the orientation the particles present. You will get an equivalent sphere with the same volume as the particle. This however can lead to issues if there is any flow alignment occurring. This can often occur with very acicular materials, there it is possible to get 3 peaks, one from the width, one from the length and one in between based on those which are spinning and exposing all the dimensions

Thank you very much Sathvik

Thank you AliRaza for your inquiry. The Aero Funnel sample feeder allows for larger sample masses to be added to the Aero S and Aero M dispersion units without needing to open the dispersion unit lid. Measurements are quicker as a result, and the larger sample mass ensures users achieve good material sampling and more reproducible results. It is an excellent solution for coarse samples, such as coffee, or cohesive powders, such as calcium carbonate. For information, see our website: www.malvernpanalytical.com/en/products/product-range/mastersizer-range/mastersizer-3000/accessories/aero-funnel-sample-feeder

Thanks for your comments and we are pleased you liked the video. The diffusion coefficient is obtained from the relation Γ=D t q 2 where q is the scattering vector, given by q=(4πn/λ0)sin(θ/2). A fuller explanation can be found here - www.malvernpanalytical.com/en/learn/knowledge-center/technical-notes/tn101104dynamiclightscatteringintroduction

Glad it was helpful!

You can follow this link and contact our sales for more information: www.malvernpanalytical.com/en/products/category/automation-solutions

Hi Tapas Pal, size is obtained from the correlation function by using various algorithms. There are two approaches that can be taken (1) cumulants determines the mean size (z-average diameter) and an estimate of the width of the distribution (polydispersity index) and is defined in ISO22412 (2018)) (2) a multiple exponential fit of the correlation function to obtain the distribution of particle sizes. There are various distribution algorithms available such as non-negative least squares (General Purpose or Multiple Narrow Modes or L-Curve). www.malvernpanalytical.com/en/learn/knowledge-center/faqs/FAQ160705CumulantsNNLS Hope this helps.

Hi Ismail, if you could contact our specialist via this form that would be great: www.malvernpanalytical.com/en/about-us/contact

Thank you for your feedback! We appreciate your honesty and understand that the background music may not be to everyone's taste. We'll take your comment into consideration for future videos and do our best to strike a better balance between the music and the narration so that it enhances rather than detracts from the viewing experience.

Thanks for your question. We assume that you are referring to the Document Wavelength in the Document Settings dialog. If that is the case, be aware that this is editable only in case there is NO Scan loaded. In case measurement data is present, the Anode material is selected/edited in the Object Inspector per Scan/dataset.

Thank you for watching! The music was chosen to match the video's tone. We're sorry if it wasn't to your liking, but we hope it didn't affect your enjoyment. We're open to suggestions for future videos. Thanks again!

@@MalvernPanalytical It was a great informative video. The main issue was the music being a bit loud, so focussing on the voice explaining was a little difficult for me.

Hi Sayeed, we can freely set the measurement duration and the number of runs as part of the Standard Operating Procedure. Hope this helps?

Thanks and welcome

Hi Ashwin, thank you for your question. The Multicore optics only consists of the iCore (incident beam optics) and dCore (diffracted beam optics). Hope this answers your question.

@@MalvernPanalytical So where are the detectors and X-Ray generators located?

Hi Ashwin, The MultiCore represents the incident beam optic iCore and the diffracted beam optic dCore. As of the detector, we have the choice between 1Der or PIXcel for the dCore. The detector is positioned behind the dCore optics as for the X-Ray tube, that is situated in front of the iCore. Hope this helps.

@@MalvernPanalytical Thanks for the info!!

Thank you Parama Sivan

Glad you liked it

Thank you Ahmed

Hi Abhishek, to measure the PSD of chocolate you need to disperse it in some kind of oil. Many oils are used - Akomed R, Sunflower oil, Isopar G. A fresh production sample (semi molten) will disperse into the oil with a little shaking, a solid chocolate will probably need some ultrasound. This will result in a chocolate / oil mix which can be added to a Mastersizer wet tank circulating clean oil for measurement. For analysis optical properties the industry tends to use the Fraunhofer model which is an option in our software. Hope this helps.

Thank you Dasun for your question. There are several reasons you may get seeming different answers from different particle sizing techniques such as laser diffraction and sieving. Notably they will be measuring different properties of the particles. You can find out more by visiting our website, search on Mastersizer masterclass. Or feel free to contact your local representative www.malvernpanalytical.com/en/about-us/contact-us/

You're very welcome!

You are welcome!

Hi Eduardo, please contact your local sales team or office, or reach out to us via linkedin.

Thank you Lina, we will take that into account.

Hello, Thanks for your question. As is often the case it depends on the application and the sample! If you are running an automated measurement the 50x that will be used for the Ramana part of the analysis. In this case you select the objective most suited for the Morphological part of the analysis and the system will automatically switch to the 50x to acquire each spectrum. In our support materials there is guidance around which objective to select if you will be performing a full MDRS analysis depending on the particle size. If you are using the system in manual mode then it is possible to acquire a spectrum using other objectives, and which you choose will depend on the sample eg particle size and scattering efficiency. Please do reach out to your local Malvern Panalytical support for further guidance or training. I hope this helps you with your MDRS application.

@@MalvernPanalytical this info will helpful to us. We have separated particle which is very small in amount,we are getting spectra of backgroung not the single particle.any reason..

There are various reasons that may lead to you not getting a good spectrum from your particle. It may be related to the particle size and/or the scattering efficiency of the material. Some materials are not Raman active. The spot size of the Raman beam is ~2um. If the particles of interest are smaller than this and/or are weak scatters then you can try extending the acquisition time. You can also consider applying a background correction. The parameters to use can be very application and sample specific. Your local support team will be happy to advise how they can offer more guidance on your specific application. Find your local team here www.malvernpanalytical.com/en/about-us/contact-us

@@MalvernPanalytical thanks will try background correction

Thank you 🙌

You're welcome!

Thank you for your question Ruhul Amin, C-18 particles are likely hydrophobic and hence will probably need some aid in bringing into a suspension with the use of suitable surfactants or a move to an organic dispersion medium. I’m sorry but we can’t answer to any great depth here or without knowing more about the samples and purpose. We would advise you to contact you local MP technical centre for more application specific advice.

You're welcome!

Glad it was helpful!