Determination of Mercury, Arsenic, Lead and Cadmium in cough medicine
The measurements were performed by using Absorption flame AAS technique and hydride technique with single beam mode. The background correction mode is deuterium background correction. Sample preparation: Pipette 1 ml of cough medicine into digestion vessel,Add 5ml HNO3 and 2ml H2O2 and leave the sample in Fume hood for 15-20 minutes,Digest sample as the temperature.