ICP OES-MS

Elemental analysis by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-OES) are commonly used to analyze elemental concentrations within rock samples, however, they may also be used for the analysis of a wide variety of sample types, both solid and liquids.

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Our standard analytical protocol involves using a flux fusion methodology to turn the sample into a liquid suitable for analysis with our ICP-MS and ICP-OES instruments. We can also carry out acid digestion, leachate and laser ablation analysis as required. The liquid is introduced into the ICP through a nebulizer in the form of an aerosol which is then ionized in the machine’s plasma.

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The ICP-MS detects the mass of the ions hitting its detector and provides a mass spectrum for the sample, with the intensity of each peak in the spectrum being directly proportional to the concentration within the sample. This concentration is quantified by comparing the intensities of the mass spectrum to known calibration standards.

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The ICP-OES differs in that it measures the effect of the aerosol on the plasma itself. When the aerosol is introduced to the plasma the elements contained within it lose electrons and give off radiation with wavelengths characteristic to the element itself. The optical spectrometer detects this radiated energy and through comparison with the intensities of known calibration standards, quantifies the elemental abundance within the sample.

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By analyzing the sample on both ICP-MS and ICP-OES it is possible to quantify the abundance of ~50 elements including major, trace, and the Rare Earth Elements. If you would like samples to be run on one individual instrument, the ICP-MS provides an analysis of trace and rare earth elements to ppm detection limits, whereas the ICP-OES provides a rapid analysis of major and some trace elements to mid ppb detection.

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We offer a Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) service where a laser is focused onto the surface of a solid sample and the fine particles ablated by this are introduced directly into the plasma. Our main use for this technique is to analyze zircons for their U and Pb isotopic concentrations and so date the age of the zircon.

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Data from our ICP systems are routinely submitted for the GeoPT programme for the characterization of new international rock standards. Copies of our GeoPT results can be supplied on request. All samples are quality controlled with matrix matching international standards to ensure all data quality is achieved to the highest standards. We are also flexible and will adapted methodologies to meet any specific requirements you may have.

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Please contact us if you would like any further information.