Abstract
The previous work has shown that the Bordeaux mixture residue on tomatoes was efficiently removed by the washing with detergent containing sugar fatty acid ester and potassium pyrophosphate. In the present work, application of the detergent to an industrial usage has been studied with respect to the following points; (1) Scale-up of the washing test in a laboratory and the use of an airbublling equipment at the washing; (2) Durability of the detergency for the Bordeaux mixture residue; (3) Content of the detergent residue in rinsed tomatoes; (4) Foaming power of the washing solution; (5) Removal effect of this detergent at a plant of the tomato processing.
From the viewpoint of the application, desirable results were obtained by the tests mentioned above. In addition, copper and arsenical residue on grapes were found to be removed most efficiently and most completely by washing with the detergent and HCl following NaOH washing.
Further, under conditions of washing procedure by brushing, it was found that mechnical factor and chemical factor make equal contribution to detergency for phenthoate residue on Satsuma mandarin.
