In terms of rapid methods, the current trend in analytical
chemistry is towards user-friendly increasingly miniaturised
instruments particularly for quality control applications. The use
of sample preparation methods for selective extraction of targets
is likely to become commonplace as user-friendly and
cost-effective techniques are becoming available. Sample preparation
methods with pre-concentration and clean-up operations
enable the analysis of several classes of food additives simultaneously
with greater specificity and better detection limits [6–8].