SIBS provides grinding service for almost any sample materials, using Retesch Oscillating Mixer Mill MM400 (for leaf, root, stem, , soil, fecal, blood, liver, and fish samples), Freezer Mill 6770 (for feather and hair), mortar and pestle (for salty soil), and scissors (for a small amount of samples such as insect and hair).

Homogeneity is very important for a better precision and accuracy of stable isotope analysis.


  • We need at least 3g of samples. If you have samples less than 1g, contact us.
  • Non-ground bulk samples can be sent in any containers. We provide glass vials.
  • Sample IDs must be clearly written on the containers.


See photos below for good and bad examples

BAD: Coarse leaf sample with some fiber

IMG 5942 1


GOOD: homogeneous leaf sample (all particles are the same size. No fiber)

IMG 5944 1



BAD: Coarse feather sample (see difference particle sizes of white and brown materials)

IMG 5940 1


GOOD: The same feather sample with above, but ground much better (smaller particle for both white and brown materials)

IMG 5996 1