Abstract
Polarographic determination of dissolved tin in orange juice were made on 80 kinds of sample in tin cans on the market. The results indicated that some of them contained 150 ppm or more of Sn. Studies were made on the solubilizing condition of tin by using carefully prepared samples under different conditions. No significant difference in Sn dissolution was caused by the variations of
(1) the sort of tinned iron as H-D or E-T,
(2) the amount of vitamin C added; while
(3) packing temperature,
(4) numbers of month of storage, and
(5) anticorrosive film coating on inner surface of the container gave 95% significant differences on the Sn dissolution. There was no remarkable correlation between the amount of dissolved Sn and the lowering of degree of evacuation, provided the Sn concentration was below 150 ppm (the limit permitted).
