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Some studies have been done to investigate the possible relationship between autism and vaccinations. Using the following paragraph as a summary, answer the following questions. There has been some public concern about the safety of childhood vaccines. Some parents have questioned the possible links between vaccinations and symptoms of autism and other disorders. A mercury-containing compound called thimerosal was previously used as a preservative in some vaccines. (A) For the investigation described in question #3 identify the Analyte, Sample, and Matrix. (B) indicate three areas where analytical chemistry is used in the narrative for this question