Analytical Techniques 2 Flashcards
Understand X-Ray Fluorescence (XRF) and its application in elemental analysis.
XRF is a non-destructive technique used for bulk analyses of rocks and sediments. It can analyze about 80 elements, from near 100 wt% down to a few ppm. XRF works by exciting atoms with X-rays, resulting in the emission of fluorescent X-rays that are used to detect element abundances.
Comprehend Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) and its use for elemental and isotopic analysis.
LA-ICP-MS is a powerful method for highly sensitive elemental and isotopic analysis of solid samples. It involves laser ablation to vaporize a small portion of the sample, which is then analyzed by ICP-MS. LA-ICP-MS is commonly used for applications such as U-Pb zircon geochronology and sediment provenance determination.
explore Electron Microprobe (EPMA) and its role in micro-scale analysis of crystals.
EPMA is a precise and accurate micro-analysis technique used for in situ analysis of micro-scale samples, such as crystals. It utilizes a focused electron beam to bombard the sample, collecting X-rays emitted by the elements present. EPMA is particularly useful for applications like geochemistry, mineralogy, and geochronology.
Gain knowledge of Thermal Ionization Mass Spectrometry (TIMS) and its significance in measuring isotopic ratios.
TIMS is a method used for the precise determination of isotope ratios. It involves thermally ionizing a sample, separating the ion beams by mass to charge ratio using a magnetic sector, and measuring the separated beams with a collector. TIMS is commonly used in radiometric dating and tracer studies.
