Yale Analytical and Stable Isotope Center (YASIC)

Our analytical services include measurements of stable and radiocarbon isotopes, cations, anions, greenhouse gases, natural γ-radiation, mercury, and nutrients in water or soil extracts.

Core Website

Brad Erkkila

Primary contact Director
Hours & Location

Environmental Science Center, 21 Sachem Street, room 078

About the core

The Yale Analytical and Stable Isotope Center (YASIC) offers services that include mass spectrometry, ion chromatography, total organic carbon (TOC) analysis, nutrient flow analysis, and microwave digestion.


Stable isotope ratio mass spectrometry

  • DeltaQ CN/S: d13C, d15N, d34S, %C, %N, %S, stable isotopes, isotopes, solid organics
  • MAT 253 Kiel: d13C, d18O, stable isotopes, carbonates, bioapatite
  • DeltaXP GasBench: d13C, d18O, water, 13C-DIC, 13C-DOC, stable isotopes
  • DeltaXP TCEA: d18O, d2H, phosphate, water, stable isotopes
  • MAT 253 17O: d17O, carbonates, silicates, BrF5, laser, vacuum line

Elemental abundance

  • Nexion5000 ICP-MS: trace metals, ICP-MS
  • Astoria Nutrient Flow Analyzer: nitrate, nitrite, ammonia, total nitrogen (TN), total phosphate (TP)
  • Eltra CS Analyzer (solids): total carbon, total inorganic carbon, total sulfur
  • Metrohm IC: anions, cations, calcium (Ca), magnesium (Mg), sodium (Na), potassium (K), sulfate (SO4), iron (Fe)
  • Gamma counter: lead (Pb), cesium (Cs), radon (Rn), lead-210, lead-214
  • Shimadzu TOC analyzer (liquids): total organic carbon (TOC), total inorganic carbon (TIC)
  • DMA80: mercury (Hg), water


  • MICADAS AMS: carbon-14, radiocarbon, carbon dating, graphite, Automated Graphitization Equipment (AGE), gas introduction system (GIS)


Shipping address

Yale Analytical and Stable Isotope Center (ESC 078)
21 Sachem Street
New Haven, CT 06511

Physical address

Yale Analytical and Stable Isotope Center

210 Whitney Avenue

New Haven, CT 06511

Primary contact

Brad Erkkila Director

Staff Scientist

Jonas Karosas

Faculty Director

Peter Raymond, PhD Professor and Senior Associate Dean of Research at the School of the Environment and Professor of Earth and Planetary Science