Mass Spectrometry & Spectroscopy 15 High Resolution Benchtop EDXRF
The Rigaku NEX QC+ is the new low-cost benchtop energy dispersive X-ray fluorescence (EDXRF) spectrometer from Rigaku. It is a compact elemental analyser that delivers rapid quantitative determination of sodium (11Na) to uranium (92U) in solids, liquids, powders and alloys. Specifically designed for routine quality control applications, the new NEX QC+ features an intuitive ‘icon-driven’ touch screen interface and built-in printer for easy operation and convenience. The 50kV X-ray tube and Peltier cooled silicon drift detector (SDD) offer exceptional repeatability and long-term reproducibility with excellent element peak resolution.
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Non-destructive Determination of Copolymer Levels in Polymer Pellets in Less than 30 Seconds
Metrohm is pleased to present a new application for the determination of copolymer levels in polyethylene (PE) and polyvinylacetate (PVA) pellets by near- infrared spectroscopy (NIRS). Without any sample preparation and in less than 30 seconds, NIRS determines the composition of the polymer blends investigated. Application Note NIR-3 is available free from
www.metrohm.com.
Thermal polymers are typically supplied in the form of chips or pellets. Some of the very properties desired for the polymers such as strength, solvent resistance and acids make analysis of these materials a challenge. Typical methods of analysis require dissolution of the pellets, which can take from several hours to more than a day depending on the material.
NIRS is uniquely suited for quantitative analysis of polymers due to the inherent benefits of this method: no sample preparation required; method is non-destructive; results in a matter of seconds.
NIRS has been successfully used to analyse other copolymers such as ethylene/propylene, styrene/butadiene, and butylene/terephtalate. Polymer additives such as antioxidants, stabilisers, and slip agents are also being monitored by NIR in pelletised samples.
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