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KMID : 0604519840100010042
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Journal of the Society of Cosmetic Scientists of Korea
1984 Volume.10 No. 1 p.42 ~ p.48
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STUDIES ON THE I LABELLING OF CASTOR OIL, AND THE DETERGENCY OF SODIUM DODECYL SULFATE
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Huh Yong-Chul
Moon Byung-Yeol
Kim Young-Kook
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Abstract
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The comparative detergency of Sodium dodecyl sulfate (SDS) solution near the first critical micelle concentration (CMC) was measured by means of a 131 I-labelled castor oil as a soil. More than 95% radiochemical purity of 131 I-labelled castor oil was obtained using potassium lidide as a carrier. Polyester test fabric was soiled with 131 I-labelled castor oil, and washed in a conventional washing apparatus mounted on appropriate devices. Fabric radioactivities were measured before and after washing by a scintilation counter. Near the first CMC, the detergency of SDS was increased with decreasing of surface tension of SDS. It was also shown that 131 I-labelled castor oil was useful for studying the detergency of SDS.
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