DOC-Labor
Dr. Stefan Huber
Pharmaceutical
Questions & Answers
Q: TOC in our aqua purificata is well within specification. Can I be sure that all residual DOC is natural or does it contain compounds from water treatment?

A: There is a specific compound eluting a 79 min. with 35 ppb C which is most likely anthropogenic. It is suggested to analyse all steps of treatment with
LC-OCD.


Q: Can we check that our active ingredient is absent in peripheral production environment? DOC in swab extracts is very high due to omnipresent fructose.

A: Compound under suspicion does not relate to all responses we find in chromatogram. Thus compound is absent (< 5 ppb).



1 2
Examples: