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自用DYQ多头样品收集器(Ⅰ-Ⅲ型)收集同位素标记的样品以来,使低能量β放射固相测量法在国内得以推广。但过去滤片测量仍用3～5ml闪烁液的测量瓶(20ml容量)法。我们在第二军医大学液体闪烁测量小型化基础上,设计了在测量瓶中心放置φ14×20mm的玻璃微杯,内放入φ14～22mm玻璃纤维滤片样品,每一样品只加0.2ml闪烁液,所测opm不低于3ml闪烁液测量瓶法。在研究微杯法测量的影响因素时发现,滤片贴在微杯壁的测量比平卧在微杯底部测量的opm值高4～6％;贴壁滤片与光电倍增管所呈的不同角度
Since the collection of isotope labeled samples by the DYQ multi-head sample collector (Type I-III), low-energy beta-radio-frequency solid-phase measurements have been promoted domestically. However, in the past, 3 ~ 5ml scintillation liquid measuring bottle (20ml capacity) method was still used for the measurement of the filter. Based on the miniaturization of the liquid scintillation measurement at the Second Military Medical University, we designed a glass microcup with a diameter of φ14 × 20mm in the center of the measuring flask and placed glass fiber filter samples of φ14 ~ 22mm with only 0.2ml of scintillation liquid per sample , Measured opm not less than 3ml scintillation fluid measuring flask method. In the study of the influencing factors of the microcup method, it was found that the measurement of the filter attached to the microcavity wall was 4 to 6% higher than that of the opm measured at the bottom of the microcupper in the supine position. The differences between the adherent filter and the photomultiplier tube angle