This analysis of lead in Mexican candy and flavored salt products is predicated on the collection
of a sample that is representative of the lot being tested. Two significant analytical challenges
are posed by these products: preparation of a representative analytical sample (i.e., one that can
provide a sufficiently homogenous analytical portion for subsequent digestion and analysis) and
ensuring reliable quantitation in matrices with high salt content. In this work, a novel procedure
was developed to prepare homogeneous analytical samples from kg quantities of product and a
pre-digestion step. Smaller subsamples from this step were then subjected to microwave
digestion and subsequent analysis via Graphite Furnace Atomic Absorption Spectrophotometry
(GFAAS). Quality control (QC) data showed good reproducibility between replicate subsamples
and good recoveries from sample spikes. Despite the expected interferences due to high salt
levels in the samples, the use of a matrix modifier and appropriate furnace conditions
surmounted these potential effects. The results from samples analyzed by both GFAAS and
Inductively-Coupled Plasma Mass Spectrometry (ICP-MS) compared very favorably. This study
demonstrates appropriate methods for obtaining highly reproducible results that can serve as the
basis for regulatory action.