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Nanoparticle Tracking Analysis used to Characterise Nanoparticles in Natural Environments
Dr Jonathan Brant is leader of the group, ‘Interfaces in the Environment: membranes, particles and nanotechnology’ in the College of Engineering and Applied Science at the University of Wyoming. The group focuses on problems associated with physicochemical processes in engineered and natural environmental systems. Understanding and ultimately controlling the many complex mechanisms that occur at environmental interfaces may resolve many of these problems.
As is the case for environmental engineering as a whole, their work falls at the junction of many different disciplines, including colloid and interface science, chemical engineering, nanotechnology, microbiology and materials science.
Nanomaterials need to be characterised in terms of their size and distribution. Dr Brant explained the background to his work: "We have two primary research tracts. First, we characterise the properties of manufactured nano materials including TiO2, nano-Ag, C60 and maghemite of varying functionalities in aqueous systems. Secondly, we characterise the transformation of manufactured nano materials and their removal in conventional and advanced water treatment processes. In both instances, we have chosen NTA to characterise the size and size distribution of the particle suspensions under varying conditions. The latter area does this as well as quantifying the particle number concentrations in an effort to better understand the ‘dose’ or concentrations of nano materials in drinking water."
Describing his practical choices for NTA, Dr Brant continued: "I also use a dynamic light scattering (DLS) system from Malvern as well as TEM imaging (particle counting from images as well as geometry assessments from images). However, using NTA allows us to work with polydisperse suspensions (DLS is very limited in this respect) and it provides us with a number count for nano materials, which is a first step in better characterising nanoparticle concentrations. While the NTA may not be perfect here, it is our best option."
To find out about the company and to learn more about particle characterisation using NanoSight's unique Nanoparticle Tracking Analysis solutions, visit
www.nanosight.com and register to receive the next issue of NanoTrail, the company's electronic newsletter.
MORE INFO. 120
Distributors Wanted for Reliable Laboratory Equipment Manufacturer
Shinetek Instruments, a top-quality lab equipment manufacturer from China, has finally opened its gates for the international market. Shinetek Instruments’ two brands Wiggens and ChemVak stand for high quality, long durability, and remarkable performance. Wiggens is your general laboratory companion and provides products ranging from hot plates with and without stirring functions over magnetic and overhead stirrers to homogenisers, shakers, multi-purpose heaters and colony counters.
ChemVak has been created as a brand specialised in vacuum equipment. Different kinds of vacuum pumps, including chemical-resistant diaphragm pumps and oil-free piston pumps, are complemented by vacuum filtration equipment to form whole filtration systems for a wide range of different applications. Water-jet aspirator pumps and bio-suction systems complete the product range and place ChemVak as a specialist for vacuum related operations.
Shinetek Instruments started out as distributor for laboratory equipment and soon became an exclusive distributor for most reputable lab equipment manufacturers. After being established as a well-respected and highly successful distributor all around China, Shinetek Instruments made the successful transition from a mere distributor to producing high level laboratory equipment itself.
Since 2006 Shinetek Instruments has been producing top-quality laboratory equipment and, by making use of its well-established distribution network, was able to quickly establish its products in the domestic market.
After the successful penetration of the domestic market, thorough preparations, and the flourishing international business relations, Shinetek Instruments now is ready for the next step: The establishment of its two flagship brands Wiggens and ChemVak in international markets on a large scale.
Despite the effective domestic distribution network and the numerous partners in overseas markets, Shinetek Instruments is still searching for distributors in the BRIC states, the Asia-Pacific region, the Middle East, Africa, and South America.
Distributors interested in partnering Shinetek Instruments should contact the Company on
info@chemvak.com. MORE INFO. 121
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