【摘要】 研究并建立了液体闪烁计数法测量生物塑料中生物基含量。首先将生物塑料样品充分燃烧,通过碳的转移与固定,最终催化合成液态苯。通过液体闪烁计数器对液体苯中的放射性核素14C衰变进行计数,从而计算生物塑料样品中生物基的含量。生物塑料样品加标回收率为98.5%~101%,相对标准偏差为0.2%。方法可用于生物塑料中生物基含量检测。更多还原

【Abstract】 A liquid scintillation counting method was developed for the determination bio-based content of biobased plastics.Firstly,bio-based plastics sample was fully combustion,and then the carbon was transferred and fixed.Finally,liquid benzene was synthesized by catalytic synthesis reaction.The decays of radionuclide14 c in liquid benzene were counted with liquid scintillation counter and bio-based content of bio-based plastics was measured.The recoveries for bio-based plastics were in the range of 98.5% ~ 101%,with the relative standard deviation of 0.2%.The method of LSC is accurate,reliable and can be used to detect actual bio-based materials.更多还原