On-line hydrogen-isotope measurements of organic samples using elemental chromium: An extension for high temperature elemental-analyzer techniques - Gehre, Matthias; Renpenning, Julian; Gilevska, Tetyana; Qi, Haiping; Coplen, Tyler; Meijer, Harro; Brand, Willi; Schimmelmann, Arndt (Analytical Chemistry, 2015)