Rosendahl, CD, Zhao, X, Maloney, AE, McFarlin, JM, Keller, KJ, Kreutz, R, Altun, J, Bachmann, LH, Hartmann, J, Batther, HK, Calhoun, AN, Elvert, M, Pearson, A, Leavitt, WD, Kopf, SH and Elling, FJ (2026) Improved procedures for the cleavage and reduction of GDGTs for hydrogen isotope analysis. Organic Geochemistry, 218. 105139. doi:10.1016/j.orggeochem.2026.105139