ラジオトレーサー法による果実・野菜に対する界面活性剤の残留に関する研究

概要

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The amounts of polyoxyethlene (20) sorbitane laurate SL (EO) remained on the fruit and vegetables such as strawberry, cabbage, cucumber and spinach washed by the detergent solution of SL (EO) have been determined by means of the radiotracer method using SL (EO) labeled with radioisotope 14C. Further studies on sodium dodecylbenzene sulfonate (DBS) and sodium triethyleneglycol dodecylether sulfate (ES) have been carried out and compared with SL (EO). The measurement was chiefly made for cabbage leaf under the various conditions. Under the condition of dipping in 0.1% detergent solution for ten minutes at 1618°C, following by rinsing twice with 100ml of water for 20sec., the amout of residual SL (EO) observed were 0.18γ/cm2 for the surface and 0.54γ/cm along the section of cabbage leaf. The amount of SL (EO) remained on cucumber and strawberry were nearly the same as that on cabbage, but that on cabbage, and spinach were four or five times larger than that on cucumber and strawberry when compared in the unit of the amount of residual SL (EO) per weight. The tendency for the amount of the various surface active agents in this study was about the same between fruit and vegetables, and the residual amount of DBS, SL (EO) and ES decreased in that order listed.
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