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LABORATORY PRODUCTS
National Physical Laboratory Selects System for Studies in Nanoparticle Characterisation
The National Physical Laboratory routinely looks at emerging techniques to evaluate their performance for the quantitative characterisation of nanomaterials. Nanoparticles are a current area of intense scientific research, as they are a bridge between atomic and bulk structures. NPL is coordinating a network of European national metrology institutes to provide new traceable standards and procedures to determine the size, shape and distribution of nanoparticles with an accuracy of better than 1nm. Many methods including Electron Microscopy (SEM and TEM), Dynamic Light Scattering (DLS), Nanoparticle Tracking Analysis (NTA) and Atomic Force Microscopy (AFM) are being used to investigate the particle size, shape and their physical properties.
One of the tasks of Dr Alexandre Cuenat as part of the Materials team at NPL is measuring and modelling of materials interactions at the nanoscale. Each measurement technique has specific applications, and for an organisation like NPL, it is important to understand all of them, their advantages and limitations.
For Dr Cuenat, working with NanoSight’s unique NTA methodology to study nanoparticles in liquids shows particular bonuses compared to other techniques: “Ruggedness, ease of use and reproducibility are all very important to us as many scientists will come to use the different techniques. The fact that NTA images, counts and sizes individual particles means it produces size distribution that cannot be observed otherwise. NTA is useful when studying polydisperse materials in the range of ~20nm up to particles of one micron. NPL has looked at a variety of calibration materials such as zinc oxide, silica, gold and silver nanoparticles and we have successfully characterised these even when problems with sample agglomeration have been observed.”
NanoSight has benefited from this recognition by NPL in that as new methods are developed whether for life science or materials applications, traceability of results and the development of standard operating practices are becoming central to success. As NanoSight CEO, Jeremy Warren observed: “More and more of our users are looking to extend the use of NTA beyond the research environment into routine analytical and quality assurance testing so to see our technology being used at the NPL is extremely important to us.”
Circle no. 363
Error-Free and Comfortable Pipetting
Colour-Coded and Eco-Friendly Trays
Rotary Tube Furnace
Eppendorf AG has upgraded epT.I.P.S. Motion, offering new colour-coded trays for instant identification of tip volume, and introducing eco-friendly Reload trays with 40% less packaging.
The new Integra PIPETBOY pro pipetting aid unites all essential characteristics for productive work with serological pipettes: accuracy, speed and comfort.
Designed for error-free and comfortable pipetting - a new integral white LED light in the PIPETBOY pro provides optimal illumination of the area around the pipette, ensuring accurate pipetting and preventing eyestrain even when dispensing liquids out of an opaque centrifuge tube or dark container.
The PIPETBOY pro enables the user to quickly, accurately and reliably dose liquids just by applying variable finger pressure on the pipettor trigger buttons, changing between drop by drop dispensing or fast motorized pipetting at a adjustable speed of up to 10 ml/ sec. Weighing just 190 grams and ergonomically designed to comfortably fit in your hand, the PIPETBOY pro makes even prolonged pipetting effortless.
Circle no. 364
Using an Eppendorf epMotion automated pipetting system streamlines repetitive liquid handling protocols, reduces human error and facilitates sample tracking. Now, new epT.I.P.S. Motion make automation even simpler and samples even safer. Single-use boxes with colour-coded trays provide easy visual identification of the three tip sizes: 50µl, 300µl and 1,000µl, so that the correct volume can be quickly selected. Each is automatically recognised by the epMotion optical sensor and all sizes are available in multiple purity grades, with or without filter.
Furthermore, delivered in a PET blister packaging with sealed cap, the new Reload trays are an environmentally-friendly development. The optional TipHolder Adapter replaces the normal tip box component, reducing waste by up to 40%.
According to Dr Oliver Franz, Executive Director Portfolio Management Automation & PCR: “The revolutionary Eppendorf epMotion transforms applications such as PCR set- up, nucleic acid purification and a wide range of routine pipetting tasks in research and pharmaceutical laboratories. The latest epT.I.P.S. Motion racks demonstrate our commitment to making automation even more intuitive and user-friendly with the new colour-coded racks, while the Reload system reduces the environmental impact of the product packaging.”
Circle no. 365
Linn High Therm are offering high quality rotary tube furnaces for special heat treatments of powders and granules with a ceramic or metallic rotary tube (inner diameter is 99mm, length is 2500mm, heated up to 1500mm).
There is an adjustable rotation speed from 0,5 up to 5rpm of the insert tube and users can adjust the inclination via the rack winch (up to 10°).
It offers 3-zone heating: fibrothal tube-heating module with embedded heating coils; Tmax 1200°C; or Kanthal Super heating elements Tmax 1600°C.
Water cooling on the insert tube of the screw conveyor is available. Insert tubes: quartz Tmax < 1100°K, powder metal- alloy < 1300°C, ceramic < 1700°C.
Options include: protective gas, screw conveyor, thermal post-combustion, multideck sieves, cooling zones and vibration feeder.
Electrically heated rotary tube furnaces are used for continuous drying, oxidising of chemicals, reducing of metal oxides, calcination and sintering of ceramic powders and granules and metal heat treatment.
Circle no. 366
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