含氚泵油表面活性剂复配法的测氚技术

Determination of ³H in Tritiated Waste Pump Oil by LSC via Dispersion With Mixed Surfactants

摘要: 为测量含氚废旧泵油的氚浓度，研究了表面活性剂十二烷基甜菜碱(BS-12)和脂肪醇聚氧乙烯醚(FEO)复配的表面化学性质和热力学性质，通过复配体系乳化泵油，并与液闪液形成分散体系达到测氚目的。结果表明，复配胶束浓度小于10^-4 mol/L、BS-12与FEO复配体积比为6∶4、泵油测量体积小于0.012 mL、NaCl浓度为0.1 mol/L时具有稳定的测量结果。

Abstract: In order to determine tritium in tritiated waste pump oil, surface chemical properties and thermodynamic functions of BS-12/FEO/H₂O system were studied. Mixed system was obtained when oil and scintillation liquid added in it. The results show that when surfactant concentration is less than 10^-4 mol/L, V（BS-12）∶ V（FEO） is 6∶4, oil volume added to 5 mL of Ultima Gold LLT cocktail is less than 0.012 mL, NaCl concentration is 0.1 mol/L, quite stable liquid scintillation counting rate can be obtained.