The University of Chicago Stable Isotope Ratio facility

Pricing **** we are no longer taking in outside runs****

Prices may change without notice (or website updates). Prices listed below are estimates based on academic pricing of $75/hr instrument time and additional $75/hr staff time using estimated time for a given run plus consumable costs. Higher rates for commercial projects. Always contact the lab before sending any samples. This is mainly set up to be a facility for use by the University of Chicago community, but is available for limited service runs. Acknowledgements: The purchases of the major pieces of equipment, mass spectrometers and peripherals, were supported by NSF award #0923831. "This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)." And many thanks to the U of C for the needed renovations and added support for the laboratory.

Device	Isotopes	samples	typical ratio: sample/total runs	U of Chicago (lower rates for self service runs)
Costech EA burn samples	¹⁵N ¹³C ¹⁵N & ¹³C	solids, organic (burn) or inorganic (decompose when tin burns)	0.71	$9.00 $9.00 $10.00


TC/EA carbon reduction	¹⁸O,	solids, Ag₃PO₄, BaSO₄, AgNO₃	0.51	$15.50 (for single run, quadruplicates recommended)
triplicate runs (all samples)	¹⁵N, ¹⁸O	solid, nitrates (not recommeded)		$20.00
	D/H	solids, organic		$15.00
	D/H	solid, hydrous minerals		$16.50
	D/H, ¹⁸O	water, injections, when running		$40.00

Gasbench, headspace analysis	¹⁸O	water, CO₂ equilibratrion	0.73	$12.00
	D/H	water, H₂ equilibration w/ Pt catalyst		$13.50
	¹³C, ¹⁸O	carbonates, after acid addition		$13.50
	¹³C	DIC, acid treated		$15.00
	¹³C	DOC, when set up (wet digestion in vial)
	traced gases	on request
Isotopologue	D47	CO₂, cleaned up and ready to run	0.63	on request

N.B. Prices are approximate, and are meant to serve as guides only. Actual cost may vary. Costs will be higher if we have to weigh out the samples. Costs will drop if users supply their own capsules and weigh out their own standards along with their samples. If samples are at the extremes of our working range, more standards will be required and the cost per sample will be higher. And prices are subject to change without notice.