[1] Vrije Univ Brussel, Ctr Pharmaceut Res, Dept Analyt Chem & Pharmaceut Technol, Brussels, Belgium
[2] Univ Pavia, Dept Drug Sci, Pavia, Italy
[3] Univ Tasmania, Sch Phys Sci, Australian Ctr Res Separat Sci ACROSS, Hobart, Tas, Australia
[4] Friedrich Schiller Univ Jena, Dept Pharmaceut Med Chem, Jena, Germany
[5] Loughborough Univ Technol, Dept Chem, Loughborough, Leics, England
[6] NIST, Gaithersburg, MD 20899 USA