|High Temperature Conversion Elemental Analyzer (TC/EA)-IRMS|
The laboratory has a Thermo Finnigan Delta plus XP isotope ratio mass spectrometer (IRMS), which is specially designed for measurement of light environmental stable isotopes 2H, 13C, 15N, 18O, 34S is a sensitive and selective instrument with application in hydrology, geology, environmental protection, radwaste management.
The IRMS is a universal tool for 13C/12C, 15N/14N, 18O/16O, 34S/32S, and 2H /1H determination in dual inlet and continuous flow modes.
Prior to stable isotope ratio measurements different samples has to be brought in gaseous form. A host of preparation methods have been developed and improved to convert different sample compounds to an appropriate gas including H2,CO, CO2, N2, and SO2.
|Water samples (δ18O, δ2H)||0.2 ml airtight bottle||0.5 l|
|Ammonia of water samples (δ15N)||1.5-2.5 mg/l NH4+ (3 l)||5 l|
|Nitrate of water samples(δ15N)||6-11 mg/l NO3- (3 l)||5 l|
|Carbonate t (δ13C)||10 mg||1 g|
Organic samples (δ13C, δ18O, δ15N, δ34S)
|1 g||10 g|
|Sulphide formed BaSO4 (δ34S)||10 mg||1 g|
|Sulfate formed BaSO4 (δ34S)||10 mg||1 g|
|Carbonate from water||0.5 l||0.5 l|
|Honey||50 g||250 g|