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March 24, 2014



Top 11 Questions You Should Ask When Buying a Particle Size Analyzer

  1. What is the size range you need to measure? Unfortunately, no one technique can measure all possible particle sizes, so the range needed will narrow the potential systems which can be used.
  2. What exactly do you want to measure and why? Particle analyzers use many different techniques to arrive at measurements. In order to figure out what technique will work best for your application, you need to define what you are trying to measure and why.
  3. Are you trying to characterize different particle types in a single sample? The large majority of particle “analyzers” only perform “particle sizing” based on a signal proportional to the particle’s volume. This, combined with an assumption that “all particles are spherical”, produces a single number, Equivalent Spherical Diameter (ESD) as a measure of each particle’s “size.” Imaging techniques, on the other hand, can measure many different particle shape attributes which can be used to automatically differentiate different particle types in a heterogeneous mixture.
  4. In what “state” should the measurements be made? In many cases, measurement of the particles in the “native state” may not be possible; for instance, a slurry of particles at high percent solids is very difficult to measure with most techniques. When dilution is necessary, care must be taken to use a diluent that is inert to the particles under study and does not alter them once diluted.

Click here to read seven more questions that you should ask when buying a particle size analyzer.

211 Accusys Atomic Absorption Spectrophotometer

The Accusys 211 is the next evolution of the highly successful Buck 210-VGP, incorporating all of the features of the 210VGP along with an automatic Gas box for easy Nitrous oxide switchover. The 211 also has a hands free ignition for added safety. 

The Buck 210/211 is a high energy, microprocessor controlled single beam atomic absorption spectrophotometer. Solid state electronics and simple optics provide the basis for our superior stability and sensitivity. The Ebert mount monochromator and user-selectable bandwidth give the system maximum flexibility.

Visit the Buck Scientific website to see all of their Atomic Absorption Spectrophotometers.

EZkem Flow Analysis Parts and Consulting provides outstanding laboratory service and support guaranteed to keep your lab running, increase your productivity, decrease your downtime and lower your operating costs.

Featured product - The Gas Diffusion Module:

Visit the EZkem website to see a full list of our products and services.

Have you noticed the reorganization of some of the LabWrench SEARCH Features?

We have moved the “Find Your Equipment” drop-down list to the Instruments Tab. 

Now all the LabWrench search features can be found on the same page!!!!!!!!!!!

Click here to see the NEWLY Reorganized Search Page on LabWrench.

Plenty of discussions are happening on LabWrench all the time. We have many questions come in daily from users that are seeking advice from fellow users and lab professionals on LabWrench. Can you help any of these users find the answers they are looking for?

Brookhaven Instruments ZetaPlus - Zeta Potential measurements off
We've been testing the BI-ZR3 reference material to make sure we're doing the sample preparation and everything right. We're getting the right conductance (~320uS), the particle size (~300nm) approximate count rate (540 kcps). But our zeta potential has been higher than what it should be (-37mV instead of -52mV). The frequency is also lower (223 Hz) than what the manual says it should be (250Hz). What could we be doing wrong to get the higher zeta potential readings and lower frequencies? Help this member.

Micromeritics ASAP 2050 - accuracy of the pore size determination
Can 2050 accurately determine pore size of 3-10 A? What is its limit?  Advise this member.

Bettersize Instruments Ltd. 2000
When I use the particle size analyzer, in trying to understand the particle sizevsdiff% (the red curve). I found that the limit of (diff%) is from (0-5) while there are diff% over 5 which cannot be fitted on the curve.  Can someone explain how this curve works? Share your knowledge.

View all Questions and Discussions on LabWrench.

Thank you Microtrac Inc. for sponsoring the Particle Size Analyzer category on LabWrench.

Microtrac strives to provide the materials characterization world with innovative, reliable, and repeatable particle size, particle shape, particle charge, and surface area analysis instrumentation. 

Microtrac’s instruments deliver insight and solutions to the complex product and process problems a company may experience.

Visit the Microtrac Inc. website  to view their full line of products.

Laboratory Safety for Waste Solvents
JM Science announces Smart Caps technology to protect the health of laboratory personnel when using waste solvents. Smart Healthy caps are in response to modern laboratory safety regulations. They are made of inert materials resistant to chemicals such as PTFE and PP. The use of a one-way check valve allows for low cost safe and secure solvent extraction in the laboratory. Read more.

GE Healthcare launches high performance Amersham™ Imager 600 series
The sensitive and robust Amersham™* Imager 600 series  from GE Healthcare is designed to enable capture and analysis of high resolution digital images of protein and DNA samples in gels and membranes. These multipurpose imagers deliver high performance imaging to chemiluminescence, fluorescence and colorimetric applications and the wide dynamic range allows weak and strong signals to be quantitated accurately at the same time. Read more.

Analytik Jena Expands Product Portfolio with ICP-OES and Launches New Product on the Market
Within its core segment for analysis measuring technology, Analytik Jena AG now offers with the PlasmaQuant® PQ 9000 its first High-Resolution Array ICP OES (optical emission spectrometry using inductively coupled plasma) for multiple element analysis as part of its own technology portfolio. This method is routinely used for determining smallest element concentrations especially in environmental analysis, material research, metal or pharmaceutical industries. Read more.

 Click here to view all news articles on LabWrench.

Biological Safety Cabinets: Design and Efficiencies

Thur. March 27, 2014
12:00 - 1:30 PM EST

 Register Now!

Sponsored by

We have so many questions filling our forums that sometimes questions can be missed and go without answers. Can you help us provide answers for these users with unanswered questions?

Malvern Instruments Zetasizer Nano - Zeta potential measurement
1.Can we measure the Zeta potential of AOT/water/isooctane reverse micro emulsion system by varying the water content of system? The system contains iron oxide nanoparticles of size 3nm to 16nm (by TEM) surrounded by AOT surfactant as shell dispersed in Isooctane.
2. Can we compare DLS size results with Small Angle X-ray scattering size results? If possible, how are they comparable? Help this member.

Micromeritics Elzone II 5390 - Coincidence too high
Although the elektrolyte was filtered (0.1µm) the coincidence of the elektrolyte without sample is at 80%. Two weeks ago it was at 0.01%. What can be the reason? Respond by clicking here.

Beckman Coulter Multisizer 3 - Hydrophobic Material
A client gave us a sample and requested a particle size distribution on it. The sample just happens to be hydrophobic so, all the particles float straight to the top of the electrolyte in the beaker and will not stay submerged, so an analysis cannot be conducted. Would it be ok to use another liquid, other than the electrolyte, for the analysis? If so, what? Or, do you know of something I can add to the beaker which would remove the sample's hydrophobicity? Share your knowledge.

Click here to view all Questions and Discussions on LabWrench.

Contact us for editorial and sales inquiries for this newsletter: or call 705-528-6888 x294



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