1. College of Light Industry and Food Engineering, Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Guangxi University, Daxue Road 100, Nanning530004, P.R. China
2. Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstraße 15, Leipzig04318, Germany
3. Ecometrix Incorporated, 6800 Campobello Road, Mississauga, OntarioL5N 2L8, Canada
4. Isodetect, Deutscher Platz 5b, Leipzig04103, Germany