Amount of Sodium Alkylbenzenesulfonate Remained on the Rinsed Tablewares and Vegetable which were Washed with its Aqueous Solution

Abstract

The amount of sodium dodecylbenzenesulfonate remained on the rinsed tableware and vegetable has been determined by radio tracer technique using labeled dodecylbenzenesulfonate 35S. If tableware rinsed, for example, two seconds with fresh water right after it was washed in 0.157% aqueous solution of sodium dodecylbenzenesulfonate, 3.9×10-6, 2.2×10-5, 1.1×10-5 and 4.7×10-5mg/cmcm2 of dodecylbenzenesulfonate remained on the porcelain, plastic, glass and stainless surface, respectively. If, for example, cabbage was rinsed for about five seconds to one minute in the trough supplying fresh water right after five minutes washing in 0.05% aqueous solution of dodecylbenzenesulfonate, 0.1-0.2mg of dodecylbenzenesulfonate remained in hundred grams of cabbage.The effects of detergent concentration, washing and rinsing periods, etc., on the amount of sodium dodecylbenzenesulfonate remained on the vegetable and tableware were also examined.