Dear comrades

We have accumulated a lot used Zinc shot in our lab in deuterium isotope
analyses.  I wonder if it's possible to recycle the used Zn shot for further
use in D/H measurement. I tried washing with HNO3 to remove the oxides and
vacuum-drying, but  it didn't work.

Your suggestions, method of treatment or references are all welcome.

Thank you for your attention.

W. M. Duan <[log in to unmask]>

BRITISH GEOLOGICAL SURVEY
HYDROGEOLOGY GROUP
CROWMARSH GIFFORD
WALLINGFORD
OXON, OX10 8BB
UK