The Marc 7000 Tritium sampler is designed with efficient capture in mind

2nd July 2020

Measuring Tritium with the Marc 7000 Tritium sampler from SDEC

The Marc 7000 Tritium sampler from SDEC uses a series of four bottles, a cooling system and a catalytic furnace to collect both tritium vapor (HTO) and gaseous tritium (HT) or organically bound tritium (OBT).

Real-time measurement and display of:

  • Air flow
  • Standard T°
  • Duration of sampling
  • Sampled volume
  • Cooling circuit T°
  • Furnace T

Applications include sampling of air from stacks, hoods, rooms and the environment.

What are the benefits of the Marc 7000?

  • Reduced evaporation thanks to the cooling system (typical T° in bottles :7°C), allowing weekly collection
  • Easy to use, with instant opening cabinet for retrieval of the 4 bubbling bottles
  • Alarms report
  • Defect reporting function
  • Low required space
  • For atmospheric sampling on exhaust stack and in environment

After filtering the aerosols of the gaseous effluent, the air passes through the first two bottles containing appropriate trapping solution in order to collect tritiated water, vapor or gaseous 14CO2 , Then it passes in an oven in which the elementary form of tritium HT or non-CO2- gases are oxidized to water vapor HTO or gaseous 14CO2 in the presence of a catalyst and oxygen. The oxidized compounds are trapped in a second series two buttles containing the same trapping solution.

Commonly two trapping units are used, one for trapping tritium and one for trapping carbon-14. The most used trapping solutions are respectively water and a sodium hydroxide solution.