Using high-performance quantitative NMR (HP-qNMR) for certifying traceable and highly accurate purity values of organic reference materials with uncertainties <0.1 %
Weber, M., Hellriegel, C., Rueck, A., Sauermoser, R., and Wuethrich, J.
Accreditation and Quality Assurance, 18, 91-98 (2013)