SF ICP MS | Sector Field Inductively Coupled Plasma Mass Spectrometry is used for suspected meteorites that are completely metallic. LMAC will use SF ICP MS analysis to measure the Wt% for Cr, Co, Ni, Cu, Ga, Ge, As, Sb, W, Re, Ir, Pt, Au.
*If the sample is partially or even highly metallic, such as with pallasites, mesosiderites, chondrites, achondrites, and primitive achondrites, but still has some rocky or silicate material, then the EPMA option will be sufficient.
What you need to do: provide LMAC with an approximately 30 gram (or larger) representative sample from the main mass of the suspected meteorite.
*After checkout, you will be sent an email with instructions for submitting your sample. Please note that samples will not be returned.
**IMPORTANT - you must provide a working email address, as this is the only way LMAC will be able to communicate with you regarding the status of your submission(s). Unfortunately the Laboratory for Meteorite Analysis and Classification does not have the resources to discuss sample status over the phone. It is therefor critical that you provide LMAC with a valid email and update your email with LMAC should it change during the course of the analysis process.
What LMAC does: we will prepare the sample, perform ICP MS analysis to determine specific elemental ratios to establish if the sample is an iron meteorite or not, and if it is an iron meteorite, exactly what class of iron meteorite it is.
Summary of Standard Analysis & Classification Service
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Sample Prep & Handling - Sample is weighed and given a field ID. A portion of the sample is cut from the primary sample mass and dissolved into an aqueous solution to more easily create an aerosol.
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Type Donation Processing & Management - According to the rules set forth by the Meteoritical Society, 20 grams or 20% of the total known weight of the specimens (TKW), whichever is less, must be donated to an approved repository in order to receive an official name, and have it published in the Meteoritical Bulletin. LMAC will verify, approve, and transfer the Type Donation to the Cascadia repository, or another Meteoritical Society approved repository.
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ICP MS Analysis - Elemental analysis of sample using as prescribed by the classifying researcher and the ICP MS lab manager.
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Classification - Initial determination establishing if the sample is an iron meteorite or not. If the sample is determined to be an iron meteorite, LMAC will use the ICP MS data to determine the exactly classification of iron meteorite.
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Write-up & Submission - If sample is a meteorite, LMAC will synthesize the analysis data into an accurate, well formed, and defensible classification writeup for inclusion and submission to the Nomenclature Committee for approval, official name or DCA number, and publication in the Meteoritical Bulletin.
- Report - A customized digital summary / report with USB archive of all assets associated with the sample, analysis, and classification.
There are times when it may be necessary to perform oxygen isotopic analysis, Raman, or additional microprobe analysis, in addition to the ICP MS analysis.
LMAC requires all iron sample submissions slated for classification and submission to Nomenclature Committee for official name and publication in the Meteoritical Bulletin, undergo ICP MS analysis. In most cases this is sufficient.