A suspected case of food tampering involving a soft drink containing FDamp;C Yellow Dye No. 5 has occurred. It is suspected that part of the...

A suspected case of food tampering involving a soft drink containing FD&C Yellow Dye No. 5 has occurred. It is suspected that part of the contents was dumped and a household cleaner was added to it. Explain how one might use spectrophotometry to prove tampering by analyzing the evidence and an unadulterated sample.