1. Federal Institute for Materials Research and Testing (BAM) - Division 1.1 - Inorganic Trace Analysis, Richard-Willstätter-Str. 11, 12489 Berlin, Germany
2. Federal Institute for Materials Research and Testing (BAM) - Division 1.7 - Organic Trace and Food Analysis, Richard-Willstätter-Str. 11, 12489 Berlin, Germany