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Successful Miniaturisation of GC Equipment
New Chromatography Product Pages
The integration of new Viscotek product pages within the Malvern website highlights how gel permeation chromatography/size exclusion chromatography (GPC/SEC) technology enhances the company’s ability to deliver insightful, information-rich material characterisation solutions for the broadest range of industries.
Market-leading Viscotek GPC/SEC systems provide size and absolute molecular weight distribution, structural information and, for copolymers/conjugated proteins, compositional data, for a diverse range of natural and synthetic polymers, bio-molecules and proteins. For protein scientists the fit with Malvern’s Zetasizer dynamic light scattering technology is especially productive, while for the polymer industry, synergy with the rheology portfolio brings added value. Application experts support users in exploiting complementary techniques to maximise the return on analytical spend.
Far more than simply a show case for the company’s extensive range of analytical instrumentation, the Malvern website has a collection of industry pages that illustrate how different techniques address the issues of specific user groups. It is also the hub that underpins the company’s exemplary customer support. With a comprehensive webinar programme, brainshark presentations that explain and educate, and case studies that demonstrate deliverable benefits Malvern leads the way in application focused service. Testimonials relating to every aspect of the company’s performance provide compelling evidence of the success of this approach.
Circle no. 34
Dolomite, in collaboration with the UK’s National Centre for Atmospheric Science, has successfully tested the miniaturisation of gas chromatography equipment for environmental testing. The glass Gas Chromatography Chip has a 300 µm thick layer and is fabricated with isotropic channels, which effectively replace the capillary and spindle structure which is characteristic of standard GC columns. This microfluidic miniaturisation enables the production of portable, robust and low power GC systems suitable for environmental applications such as atmospheric monitoring.
The chip design includes an injection zone, which allows activated carbon particles to be loaded and held, forming a sample absorption column. Closely packed within a 100 x 100mm microfluidic chip, the 7.5m and 1.4m long channels have an internal diameter of 320 µm to ensure efficient heat transfer. With a circular cross section, a uniform coating can be evenly applied to the inside surface of the channel, effectively mimicking the stationary phase, to aid separation.
Circle no. 35
New Solution for LPG Analysis Based on Gas Chromatography Determining impurities in LPG is a known analytical
challenge, both for a quantitative as well as a qualitative detection. Current methods used for the analysis of LPG, ASTM D 2158 and ISO 13757, bring along severe safety risks and are labor intensive.
The solution for a safe and accurate LPG analysis is the ‘High Pressure Injector (HPI)’ developed by Shell Global Solutions in close cooperation with Da Vinci Europe Laboratory Solutions. By injecting directly on the GC column under high pressure this special injector prevents any discrimination and fractionation, which will occur when using a vaporiser and heated transfer line.
The HPI enables to inject up to 50 Bar for samples with a volume of 50 to 500 ul. As it does not require an LPG vaporisation, the analysis time and safety risks are considerably reduced. In addition the injector requires minor maintenance and is very easy to use.
The High Pressure Injector is only one of the examples of the ways in which Da Vinci Europe can assist laboratories in making them more efficient.
Circle no. 36
Circle no. 37
INTERNATIONAL LABMATE - FEBRUARY/MARCH 2010 - CHROMATOGRAPHY & SPECTROSCOPY
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