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首页> 美国政府科技报告 >The Adsorption of Carbon-14-Labeled Stearic Acid on Soda-Lime Glass
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The Adsorption of Carbon-14-Labeled Stearic Acid on Soda-Lime Glass

机译：碳酸钙14标记硬脂酸在钠钙玻璃上的吸附

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Procedures have been devised for producing highly compacted monomolecular layers of carbon-14-tagged stearic acid on fire-polished soft (soda-lime) glass through retraction from a nitrobenzene solution. While thermal desorption studies indicated a small quantity of weakly bonded stearic acid on the surface, its rate of removal by other mechanisms (dissolution and isotopic exchange) suggests that only a single type of bonding exists. The rate of loss of stearic acid-1-14C increased with increasing temperature, but the scatter in the data prevented the calculation of the activation energy for desorption. Difficulties in defining the surfaces under investigation rather than weaknesses in the radiochemical technique are the major handicaps in applying radiotracers to the study of surface chemical phenomena. (Author)

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