@article{Matschat_2002,
title={High Purity Metals as Primary Calibration Materials for Elemental Analysis-Their Importance and Their Certification},
volume={43},
ISSN={1347-5320},
url={http://dx.doi.org/10.2320/matertrans.43.90},
DOI={10.2320/matertrans.43.90},
number={2},
journal={MATERIALS TRANSACTIONS},
publisher={Japan Institute of Metals},
author={Matschat,
Ralf and Czerwensky,
Michael and Pattberg,
Sandra and Heinrich,
Hans-Joachim and Tutschku,
Silke},
year={2002},
pages={90–97} }