Development of certified reference materials for the determination of cadmium and acrylamide in cocoa.

Since 1 January 2019 a maximum content of 0.6 mg kg cadmium (Cd) in cocoa powder sold to the final consumer or as an ingredient in sweetened cocoa powder sold to the final consumer (drinking chocolate) is set by the Commission Regulation (EU) No. 488/2014.

Determination of total sulfite in wine by ion chromatography after in-sample oxidation.

Sulfur dioxide (SO2) or sulfites are the most common preservatives used in winemaking. The level of total SO2 is subject to regulation. Currently, the regulatory determination of total SO2 (including sulfites) is done by the optimized Monier-Williams (OMW) method, which includes time-consuming distillation and titration steps.