International Journal of Analytical Chemistry / 2016 / Article / Fig 1

Research Article

Characterization and Uncertainty Assessment of a Certified Reference Material of Chloramphenicol in Methanol (GBW(E)082557)

Figure 1

The H-NMR spectra of (a) internal standard (ethyl paraben and methanol-D4) and (b) sample solution (chloramphenicol, ethyl paraben, and methanol-D4).
(a) Ethyl paraben
(b) Ethyl paraben + chloramphenicol

Article of the Year Award: Outstanding research contributions of 2020, as selected by our Chief Editors. Read the winning articles.