Flash EA 1112 Series                                                 Delta Plus XP

Characteristics of Instrumentation:

Isotope Ratio Mass Spectrometer (IRMS) Delta Plus XP (ThermoFinnigan), installed at LSCE in 2001, coupled to an Elemental Analyzer Flash EA 1112 Series installed in 2008. This spectrometer is a Continuous Flow type spectrometer. It is dedicated to the analysis of organic matter contained in different types of samples (sediments, bones, tissues, particles in suspension, etc.). The measurement accuracy of carbon isotopes is about 0.05 ‰. The amount of carbon required for a measurement is from 20 to 40 μg for isotopic measurements and an amount of 10 to 15 mg of samples is required for elemental analysis.

Principle of Measurement:

http://en.wikipedia.org/wiki/Isotope-ratio_mass_spectrometry

Measurements performed by instrumentation:

Carbon and nitrogen elementary quantification and carbon isotope (δ¹³C) analysis of organic matter. Developing in progress of isotopic measurements of nitrogen.

Contacts:

Caroline Gauthier : caroline.gauthier[a]lsce.ipsl.fr

Christine Hatté : christine.hatte[a]lsce.ipsl.fr

Jérémy Jacob : jeremy.jacob[a]lsce.ipsl.fr

Instrument description:

The MFK2-FA susceptibilitymeter measures low-field susceptibility at three different frequencies (916, 3904 and 15616 Hz) and at variable fields (2 to 700 A/m). With a sensitivity of 2.10-8 SI (at low frequency), it is suitable for discrete samples of various types and up to several centimetres in size. The device also allows to precisely determine the tensor of the anisotropy of magnetic susceptibility using a rotation measurement mode in three different positions.

Analyses performed on the instrument:

• Low-field magnetic susceptibility
• Measurement of frequency dependence
• Measurement of anisotropy of magnetic susceptibility (AMS)
• Adapted for discrete centimetric samples of rocks, sediments, soils, archaeological baked clays…

Contacts:

Gwenaël Hervé : 01.69.08.02.48 / gwenael.herve[a]lsce.ipsl.fr

Funding:

DIM-MAP ANIMAS project