MS-200 applications include:
the detection and analysis of volatile and semi-volatile organic contaminants(VOCs) on remediation sites - as a fast and cost effective screening process prior to site renewal.
urban air quality research - measuring the spatial distribution of pollutants.
industrial hygiene - including the quality analysis of air cleaning systems.
emergency response testing - fast unambiguous identification of unknowns.
fire and crime scene investigations - identifying accelerants used in arson at the fire scene.
At the heart of the MS-200 is Kore's patented Converging Annular Time- of-flight mass spectrometer. The CAT's high sensitivity is the key to making the system portable. As extremely small quantities of sample gas are required, low powered, zero maintenance vacuum pumps can be used. The MS-200 uses electron impact ionisation, yielding spectra that correspond to extensive and well established NIST mass spectral databases. Unlike other mass spectrometers, the CAT's very clean ion source eliminates problems associated with build-up of sample residues and electron emitting filament poisoning, giving enhanced filament lifetime with a consistent quantitative performance.
There is no need for a separate vacuum base station as the CAT vacuum system is kept permanently sealed and is entirely self contained within the MS-200 case. The vacuum is maintained by an ion pump and a non-evaporable getter which deal with all gases. The battery can run the ion pump for approximately two and a half days. A mains adapter is used if the unit is to be left for many days. If the battery runs flat, the getter pump maintains the vacuum until power is re-applied.
Sample gases are drawn through a heated inlet system by a pump and enter the CAT source via a membrane assembly. The membrane assembly provides a long-life, low maintenance, rugged, concentrating sample inlet that allows p.p.b. sample detection limits to be achieved for many compounds. Typical analysis times are under one minute even at the highest sensitivities and the membrane inlet yields a good quantitative accuracy.
Data is displayed on a notebook PC, using the Windows® based GRAMS/AI™ software from Thermo Galactic Corporation. This industry standard software has been customised by Kore to make the collection of spectra a simple press of a virtual button. Kore provides a spectrum library with library search facilities and data analysis software for the automatic analysis of mixtures that presents the identified sample gas components concentrations in tabular form.
Example sensitivity: < 5ppb in 10 secs ( Benzene )
Mass range: 1 to 1000 amu
Dynamic range: 6 decades
Linearity: better than 5 %
Battery running time
Analysis: 6.6 hours ( 1 spectrum every 5 minutes)
Pumping only: 4 days
MS-200 case and contents
Data acquisition: laptop with NIST Library
Weight: 20 kg ( 16 kg no battery )
Size: 531 x 328 x 213 mm