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Topics Covered
Background
Applications
Testing Services Offered by Exova
Samples Tested by Exova
Exova’s Services
ICP Optical Emission Spectrometers
ICP Mass Spectrometry
Industrial Microwaves
Flame Atomic Absorption Spectrometers
Graphite Furnace Atomic Absorption
Direct Reading Emission Spectrometers
Direct Reading Hydrogen, Nitrogen and Oxygen Instruments
Gas Chromatographs / High Performance Liquid Chromatographs
Glow Discharge OES
Background
Exova offers an unrivalled range chemical analysis services. This ensures that Exova has the capability to analyse metals, fluxes, gases in metals, residues and fluids. Exova are frequently called upon to provide analytical services on a range of metals including:
- Metals - Ferrous and Non-Ferrous
- Oils - Viscosity and Wear Metal Elements
- Waters and Waste Waters
- Effluents
- Soils
Applications
- Engineering
- Pharmaceutical
- Environmental
- Health & Safety
Recent developments within the group have increased the equipment level, such as Inductively Coupled Plasma - Mass Spectrometry and Glow Discharge.
Testing Services Offered by Exova
Exova inventory includes: -
- ICP Optical Emission Spectrometers
- ICP Mass Spectrometry
- Industrial Microwaves
- AA Spectrometers, Flame and GFAAS
- Direct Reading Emission Spectrometers
- Direct Reading Hydrogen, Nitrogen and Oxygen
- Gas Chromatographs
- High Performance Liquid Chromatographs
- Glow Discharge OES
Exova has recently added three high-resolution solid state ICPs to its array of analytical equipment. These instruments use an electronic imaging chip rather than conventional photomultipliers, hence they can run at the speed of simultaneous ICP yet provide continuous wavelength coverage between 175-780nm.
Samples Tested by Exova
All forms of sample are forwarded to Exova, including drillings / turnings, solid samples and liquids.
Exova’s Services
ICP Optical Emission Spectrometers
The high temperature argon plasma used by an ICP reduces matrix effects, producing straight-line calibrations. This enables low sample weights to be analysed, coupled with its wide calibration range it makes this the most flexible instrument available today.
ICP Mass Spectrometry
ICP-MS is used for the routine analysis of trace elements in drinking waters, ground waters, effluents and soils. ICP-MS is capable of sub-part per billion (ppb) detection for most elements.
Industrial Microwaves
These are used to dissolve samples in sealed Teflon pressure vales to facilitate ICP analysis. This technique has major advantages over conventional dissolution, most notably prevention of volatile element loss, in the analysis of Corrosion Resistant Alloys. The use of industrial microwave technique brings further benefits in time reduction and cost saving.
Flame Atomic Absorption Spectrometers
AA Spectrometers have unsurpassed performance with regard to the analysis of alkali earth metals, as typically required in the analysis of aluminum alloys.
Graphite Furnace Atomic Absorption
These are used to determine ppm and sub ppm levels of residuals in metals. Particularly useful for the determination of low boiling point tramp elements in aerospace alloys.
Direct Reading Emission Spectrometers
These instruments enable the rapid analysis of a wide range of alloys including - Carbon / Low Alloy Steels, Stainless Steels, Cast Irons, Aluminum Alloys, Nickel Alloys and Copper Alloys. Relatively simple sample preparation allows rapid turnaround of results using this technique.
Direct Reading Hydrogen, Nitrogen and Oxygen Instruments
Exova can offer both fusion and vacuum hot extraction techniques for the determination of hydrogen in metals. Oxygen and Nitrogen can also be analysed using fusion techniques.
Gas Chromatographs / High Performance Liquid Chromatographs
Gas Chromatographs / High Performance Liquid Chromatographs are regularly used to analyse volatile organic compounds by the environmental sector.
Glow Discharge OES
Glow Discharge OES can be used for bulk quantitative analysis, where its narrower emission lines, compared with conventional OES, result in fewer inter-element interferences. Due to the uniform sputter profile, the technique is also capable of quantitative depth profile analysis of materials coatings or can be used to determine metallurgical treatments such as carburisation or nitriding.
Source: Exova
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