Gonzalez and colleagues developed a voltammetric procedure for the determination of tert-butylhydroxyanisole (BHA) in chewing gum.13 Analysis of a commercial chewing gum gave results of 0.20 mg/g. To...

Gonzalez and colleagues developed a voltammetric procedure for the determination of tert-butylhydroxyanisole (BHA) in chewing gum.13 Analysis of a commercial chewing gum gave results of 0.20 mg/g. To evaluate the accuracy of their results, they performed five spike recoveries, adding an amount of BHA equivalent to 0.135 mg/g to each sample. The experimentally determined concentrations of BHA in these samples were reported as 0.342, 0.340, 0.340, 0.324, and 0.322 mg/g. Determine the % recovery for each sample and the average % recovery.