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通常测定痕量硼的主要困难是分离过程中硼的回收率不稳定。所以获得一个低而稳定的硼空白是非常重要然而又非常困难的课题。本文采用同位素稀释质谱法,用N-甲基葡萄糖络合树脂纯化试剂并简化了分离流程,合理选择发射剂用量,因而获得了低而稳定的硼空白和高的测定灵敏度。方法检出限为1.5×10~(-8)克。测定含硼23ppb的水样和含硼0.143ppm的铀化合物试样的精密度分别为±1.3%和±5.9%。本方法参加了国际原子能机构(IAEA)1984年组织的国际分析比对,在有25个国际上著名的实验室参加的比对中,我们的结果与最后的公认值相符。
The main difficulty with the conventional determination of trace amounts of boron is the unstable recovery of boron during the separation. So getting a low and stable boron blank is a very important but very difficult topic. In this paper, isotope dilution mass spectrometry, N-methyl glucose complex resin purification reagent and simplify the separation process, a reasonable choice of the amount of propellant, resulting in low and stable boron blank and high assay sensitivity. The detection limit was 1.5 × 10 ~ (-8) g. The precision of measuring 23ppb boron-containing water samples and 0.143ppm boron-containing uranium compound samples was ± 1.3% and ± 5.9%, respectively. This method participates in international analysis and comparison organized by the International Atomic Energy Agency (IAEA) in 1984. In a comparison of 25 internationally renowned laboratories, our results are in line with the finally accepted values.