Analyses of Sprayed Apples for Lead and Arsenic

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Abstract
In continuation of work on arsenical residues, apples grown at Yonkers, New York, that had received the standard spray schedule comprising 5 applications of lead arsenate (4 lbs. to 150 gals.), during the season of 1927, showed on analysis an average of 0.912 mg. of metallic lead per kg. of fruit and a maximum of 1.80 mg. per kg. The arsenic trioxide found in the samples averaged 0.099 mg. per kg. of fruit with a maximum of 0.193 mg. per kg., this maximum being considerably below the limit adopted by the Royal Commission on Arsenical Poisoning in 1903 (1.429 mg. per kg.). There were 33.24 inches of rainfall from the time the first spray was app1led until the date the fruit was picked.