Stable Isotope Laboratory

Stanford University
Geological and Environmental Sciences, Bldg. 320
Stanford, CA 94305-2115
Tel: 650-723-0817, Fax:650-725-0979

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Finnigan MAT Kiel III carbonate device interfaced with a MAT 252 IRMS:

 Description: Individual acid bath carbonate system capable of analyzing 46 samples in an automated run.

 Power requirements = 230V (-10%, + 6%), 16A three phase, 50/60Hz. Max permissible voltage between ground and neutral lines < 400mV.

 Liquid nitrogen = 0.5 l/sample.

 Phosphoric acid = 500ml reservoir.

 Compressed air supply = 50 to 75psig. (350 to 500Kpa).

 Compressed helium = 15ml/sample, industrial grade He.

 Ambient temperature range = 64 to 82°F (18-28°C).

 Relative humidity range = 20 to 70%.

 Dimensions = 6.25ft H x 2.95ft W x 2.95ft D (190cm H x 90cm W x 90cm D).

 Weight = 220lbs (100kg).

Kiel III connected to 252 IRMS specs:

 External precision 1s @ 20µg = 0.03ppt ¹³C, 0.06ppt ¹⁸O.

Kiel III specs :

 Sample amount = 20 - 100µg

 Acid used = orthoH₃PO₄ @ 70°C, , 2 to 3 drops/sample

 Sample capacity = 46 sample continuous automated run

 Analysis time: d¹³C and d ¹⁸O approximately 30 minutes/sample