Fig. 7From: Quartet metabolite reference materials for inter-laboratory proficiency test and data integration of metabolomics profilingBest practice for inter-laboratory proficiency test of metabolomics profiling using Quartet metabolite reference materials. a Flowchart of an inter-laboratory proficiency test using the Quartet metabolite reference materials. b Inter-laboratory proficiency for each of the 22 batches of metabolomic datasets using targeted or untargeted strategies with SNR, RC, and recall. The overall performance was classified into four levels (Great, Good, Fair, and Bad)Back to article page