Purdue Stable Isotope Facility

Overview of Services

Many of the PSI lab’s services are now available to researchers at Purdue and elsewhere on a contract basis. Analytical services currently offered include:

• δ²H and δ¹⁸O water analyses (precision < 1‰, 0.2‰)
• δ¹⁸O organic solid analyses on TCEA-IRMS (precision < 0.3‰)
• δ¹³C, δ¹⁵N, %C, and %N organic and inorganic solids on EA-IRMS (precision < 0.2‰, 0.3‰)
• δ¹³C gas from organic respiration on TGA-IRMS (precision < 0.2‰)
• δ¹⁵N and δ¹⁸O of denitrifiers on continuous-flow IRMS using headspace extraction (precision < 0.1‰, 0.5‰)
• δ¹⁵N, δ¹⁸O, and ∆¹⁷O of denitrifiers on continuous-flow IRMS using headspace extraction+gold tube thermal decomposition (precision < 0.4‰, 0.1‰, 0.3‰)
• Compound-specific analysis of plant and soil lignin on a Shimadzu gas chromatograph quadupole mass spectrometer
• A range of chemical and physical sample preparation services

Leadership

Leadership Personnel

Dr. Timothy Filley, Professor
filley@purdue.edu
(765)494-6581

Dr. Greg Michalski, Associate Professor
gmichals@purdue.edu
(765)494-3704

Dr. Lisa Welp, Assistant Professor
lwelp@purdue.edu
(765)496-6896

Core Staff

Jani Sparks, Stable Isotope Specialist
jmsparks@purdue.edu
(765)494-0289

Getting Started

**For Purdue individuals: First-time users should click "Register"; then select "Register using your Purdue Credentials" in upper right.  Returning students will click "Sign In"

**For Non-Purdue individuals: Before you register, you must be assigned a Business Partner Number and given Purdue credentials to register/login.  

    Please contact the center manager for further information.

**In addition, the Purdue Stable Isotope Facility requires 'Access Approval' to use it's core.  Please contact Jani Sparks to gain access to this core.

Location and hours of operation

Links and Resources

1. Purdue Stable Isotope Facility

Contacts