The constantly use of analytical
techniques combined with CPE have been proposed in the
past 12 years (Pytlakowska, Kozik, & Dabioch, 2013). A mixture of
Cetyl pyridinium chloride (CPC) as sensitive enhancing agent and
Polyethylene glycol sorbitan monolaurate (Tween 20) as extracting
agent was successfully used for the preconcentration and determination
of total Sn as Sn(IV) in canned beverage samples in the presented
study.