Radiometric or mass spectrometric analysis of the long-lived fission product ¹⁰⁷Pd is notoriously difficult. We developed and optimized a chemical separation protocol for minute amounts of radiopalladium with a subsequent measurement by inductively coupled plasma triple quadrupole mass spectrometry with propane as the collision gas. This allows for detection limits of <2 ng of ¹⁰⁷Pd/kg, which makes the method suitable for environmental samples with low levels of ¹⁰⁷Pd. For testing of this method, a sample of sediment from the Chernobyl cooling pond was analyzed. Indeed, it could be shown that the cooling pond sediment exhibits a uniquely increased ¹⁰⁷Pd/¹⁰⁵Pd ratio (0.08 ± 0.02), thus strongly indicating detectable levels of ¹⁰⁷Pd using this method.

中文翻译：

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在切尔诺贝利的池塘沉积物样品中检测裂变产物钯 107

众所周知，长寿命裂变产物¹⁰⁷ Pd 的辐射或质谱分析非常困难。我们开发并优化了微量放射性钯的化学分离方案，随后通过电感耦合等离子体三重四极杆质谱法以丙烷作为碰撞气体进行测量。这使得¹⁰⁷ Pd/kg 的检测限小于 2 ng ，这使得该方法适用于¹⁰⁷ Pd含量较低的环境样品。为了测试该方法，分析了来自切尔诺贝利冷却池的沉积物样本。事实上，可以证明冷却池沉积物表现出独特增加的¹⁰⁷ Pd/ ¹⁰⁵Pd 比率 (0.08 ± 0.02)，因此强烈表明使用此方法可检测到¹⁰⁷ Pd 的水平。