Ecogeochemistry Platform - iEES Paris

Materials

Elemental analyzer Flash EA 1112 (Thermoelectron)

• Allows mass quantification of total carbon and total nitrogen for any liquid or solid sample. The organic and inorganic parts of each element can also be calculated after treatment.
• The technique is based on oxidative combustion with Helium for vector gas and gas chromatography with TCD detector.
• The sample requirement is low (only a few milligrams to a few tens of milligrams depending on the nature of the sample).

Organic carbon analyzer for liquid media TOC-V csh (Shimadzu)

• Allows the quantification of total organic carbon as well as in its various forms (POC, NPOC..
• The technique is based on 680°C oxidative combustion with gas chromatography and NDIR (Non Dispersive InfraRed) analysis.
• Robust analysis allowing processing of a hundred samples per day.
• Sampling bottles available, contact the plateform manager for more information

Continuous flux analyzer Futura (AMS Alliance)

• Allows the quantification, in liquid medium, of Total Phosphorus, Assimilable Phosphorus (orthophosphate), Ammonium, Total Nitrogen, Nitrate and Nitrite.
• The technique is based on the fractionation of the samples and the passage of a fraction per analysis module. The analysis is based on colorimetry.
• For solid samples, extraction protocols exist for each module. Allow a relatively long preparation time for analysis. The device can analyze up to 60 samples per hour.

Vapour pressure osmometer VAPOR 5600 (Elitechgroup, Wescor)

• Allows the measurement of osmolality in liquid, viscous or tissue samples (plasma, sheet…).
• The analysis is based on the measurement of the vapour pressure by a TCD detector. This allows osmolality to be achieved at room temperature, avoiding cryoscopic artifacts.
• Robust analysis requires only 10 µL of sample (we can go down to 5 µL thanks to a protocol developed on the plateform).

Gaz analyzer FTIR DX4040 (GASMET)

• Allows the quantification in a confined space of the following gases: N₂O, CO₂, NH₃ and CH₄
• Based on FTIR technique (Fourier Transform InfraRed spectroscopy).
• For its use in the field, the plateform team has designed, in partnership with the company SISTEC, a 30cm diameter analysis chamber in high quality stainless steel.
• The DX4040 can be carried as a backpack and on a Flying case.                

µGC  3000 (Agilent)

• Allows gas analysis in the field as well as in the laboratory (requires helium for vector gas).
• Based on a high capacity TCD detector and gaz chromatography
• Available with a multi-lane smuggler.

Basic analyses achievable on the plateform

• pH with pH meter and ThermoFischer Orion probe (pH KCl and water)
• Moisture content (according to NF EN ISO 17892-1 December 2014)
• Dry bulk density of soil ( according to NF EN ISO 11272 June 2017)

Sample preparation on the plateform

• Mineralization
• Grinding (ball, rotor, liquid nitrogen)
• Drying (air or oven)
• Weighing (RADWAG microbalance, land balance,…)
• Incubation (incubation cabinet)
• Carbonization (Nabertherm muffle furnace over 1000°C)