Most of the elements on the periodic table, with the exception of C, H, O, N, the halides & inert gasses can be analysed, in the concentration range of hundreds of mg/L to ng/L.
Major and minor elements down to mid-ppb values are measured on a Thermo ICap 6200 ICP-AES, while ultra-trace analysis is done on an Agilent 7900 ICP-MS or Agilent 8800 QQQ ICP-MS.
Laser Ablation ICP-MSTrace element analysis A Resolution M-50-LR Excimer laser ablation system is connected to an Agilent 7700 ICP-MS for most of the trace element analysis, using spot sizes between 60 and 200µm.
Trace elements in bulk rock samples are analysed on polished mounts prepared from XRF fusions.
Data is quantified with calibration solutions prepared from NIST traceable standards, and quality control procedures according to US EPA guidelines are followed to ensure accuracy of data.
Samples can be prepared by the client, or we can do a microwave digestion on a large variety of samples.
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Taking into account the relatively low closure temperature of the U-Pb system in apatite (350–550°C), the c.
340 Ma apatite ages mark the end of high temperature tectonometamorphic activity in the Tatra Mountains.
Individual mineral grains can also be mounted and polished for analysis.
Mounted and polished NIST standards and certified reference materials are used for quantification, using standard bracketing.