Mass Spectrometry & Spectroscopy 21 New Variable-Energy Electron Ionisation Technology Launched
Markes International has announced the launch of a variable-energy electron ionisation source technology for GC–MS, Select-eV®
. By enabling the energy of ionising electrons to be changed, Select-eV breaks new ground in the field of GC– MS. It allows the production of reference-quality electron ionisation mass spectra with conventional full-fragmentation patterns, and repeatable ‘soft-ionisation’ spectra exhibiting reduced fragmentation and an enhanced molecular ion.
Previous attempts to develop soft electron ionisation have been compromised by a dramatic drop in sensitivity. Other approaches to soft ionisation have also been limited by the inconvenience of reagent gases or source exchange. Select-eV overcomes all these problems by maintaining or enhancing sensitivity, without the need to reconfigure the system or add reagents.
Nick Bukowski, Mass Spectrometry Business Unit Manager at Markes, said “Using Select-eV, the desired ionisation energy is simply selected as part of the method setup in the controlling software. Energies can be varied anywhere from standard 70 eV down to 10 eV. The molecular ion is enhanced at lower energies but a degree of structurally significant fragmentation is also maintained. This makes Select-eV perfect for any GC–MS analyst needing further confirmation of compound identity, or wanting to distinguish between compounds with spectra that are very similar at 70 eV.”
Bukowski added “Lowering the energy of electron ionisation usually causes a dramatic drop in sensitivity, but Select-eV overcomes this problem. In fact, the signal-to-noise ratios of many compounds are increased at lower energies. This is a crucial advantage of Select-eV for trace analysis and for challenging samples such as the complex mixtures of hydrocarbons routinely investigated in the petrochemical industry.”
Select-eV is available with the BenchTOF range of time-of-flight mass spectrometers from Markes International, which enjoy increasing popularity in the GC–MS field for their high degree of sensitivity and the production of ‘reference-quality’ spectra, alongside numerous productivity advantages for the analyst.
Markes is launching Select-eV and the newly updated BenchTOF line of mass spectrometers at the HTC-13 conference in Bruges, Belgium, from January 28. The company will also be presenting their world-leading range of innovative thermal desorption technology for automated extraction/concentration
of trace organics in air and materials.
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Spectronic Camspec are pleased to announce the launch of their new website
www.spectronic.co.uk
New to the website is an e-commerce section where visitors can purchase all their spectroscopic/electrochemical accessories including
• Cuvettes • Deuterium Lamps • Quartz Tungsten Lamps • FTIR Accessories • Electrodes • and Buffer Solutions
Also available to view online is the full range of analytical instruments which include
• UV/VIS Spectrophotometers • FTIR Spectrophotometers • Flame Photometers • Mercury Analysers • XRF Analysers • Food Texture Analysers
plus a whole range of portable and bench top pH, Conductivity, Dissolved Oxygen and Water Testing Instruments.
www.spectronic.co.uk Email
sales@spectronic.co.uk
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Microspectrometer Provides Full Spectral UV Analysis in a Tiny Footprint Designed for integration into spectroscopy instrumentation, medical devices,
process monitoring and other applications where a small footprint is desired, the STS-UV Microspectrometer from Ocean Optics is a compact yet high-performance spectrometer. Measuring just 40 mm x 42 mm and 24 mm high, this product is optimised for applications in the ultraviolet (190-650 nm) including absorbance measurements, point of care diagnostics, emission spectroscopy and laser characterisation. The STS-UV provides powerful performance for full spectral analysis enabling applications where a range of the spectrum is necessary for proper measurements.
The high signal to noise and wide dynamic range make the STS-UV useful for demanding measurements such as determining the absorbance from dilute solutions. A selection of configurations allows users to optimise optical resolution to a specific application. Previously released versions of the STS are also available for the visible (350-800 nm) and shortwave near-IR (650-1100 nm) regions of the spectrum. All versions feature the same form factor and comparable performance specifications.
The STS-UV is anchored by a 1024-element detector in a crossed Czerny Turner optical bench. Its optical design and advanced CMOS detector elevate STS to performance levels comparable to larger and more expensive spectrometers. For example, excellent linearity, absorbance repeatability and wavelength accuracy ensure reproducibility even in large production quantities. In addition, high thermal stability performance and low baseline drift ensure that data stays accurate, even under changing environmental conditions. The STS-UV easily integrates into other devices or can be set up next to a process line for quality control measurements or as part of a lab station. Several software control options, from drivers for LabVIEW and MATLAB to DLLs for direct control of the spectrometer in Java, Linux or Windows, allow users to seamlessly integrate STS. For laboratory experiments, all STS spectrometers are compatible with Ocean Optics’ OceanView spectroscopy software.
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Free X-ray Transition Energies App for your Smartphone or Tablet
The ever-popular SGX Slide-rule has joined the digital age and is now available as an App for iPhone and Android. The app includes elemental properties, x-ray transition energies and reverse energy lookup. It permits a user to specify a transition energy value in keV and automatically determines and displays the elements and ‘lines’ closest to this value. It also allows the user to select an element and displays it’s x-ray transition energies.
Values are based on experimental values. Where experimental values are not available the database uses theoretically derived values. The app also includes a database with physical properties for each element.
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Instruments for Advanced Science
QGA Gas Analysis System QGA
Fast data acquisition 500 measurements/sec
Response time to 150 ms
Dynamic range PPB to 100%
Microreactor with integrated MS detector
CATLAB-PCS
TPD/TPR/TPO and reaction studies
1-20°C/min heating rates
Temperature ramps up to 1000°C
Close-coupled hotzone for 500 ms response
info@hiden.co.uk |+44 (0)1925 445 225 for further details of Hiden Analytical products contact:
www.HidenAnalytical.com
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