Correction to: Analytical and Bioanalytical Chemistry

https://doi.org/10.1007/s00216-020-02839-7

Unfortunately, there was an error in Figure 1 of this manuscript; please find the correct information below:

Fig. 1
figure 1

Chromatograms of unhydrolyzed GbE unfinished samples (GbE A–T), commercial GbE finished products (GbE W–Z), NTP lots (1, 1F), and NIST standard extract (GbE U) and tablet (GbE V)