一种新的可同时测定地质样品中的锇,铂和钯的放射化学中子活化分析方法(英文)

A New Method for Determination of Osmium, Platinum, and Palladium in Geological Samples by Radiochemical Neutron Activation Analysis

本文在多次实验的基础上,建立了一种新的基于N1923萃取,抗坏血酸处理,可同时测定地质样品中Os,Pt和Pd的放射化学中子活化分析方法.抗坏血酸可有效地控制OsO4的挥发丢失,N1923可将Os,Pt和Pd同时萃取收集,回收率达90％以上,并用Allende陨石标准参考物（SRM）进行检验,Os的测得值（448～738×109g/g）,与文献值（0.4～0.77×106g/g）一致.此外,用该方法补充了Allende陨石和Fish Clay标准参考物中缺少的相应元素丰度.

On the basis of preliminary experiments, a Radiochemical Neutron Activation Analysis (RNAA) method to determine Os, Pt and Pd in geological samples in one procedure was set up by using N1923 extraction and ascorbic acid treatment. The radiochemical separating procedure was suggested. This method not only collects the Os, Pt and Pd, but also effectively controls the volatile loss of Os, in which the recovery of Os is more than 90%. In addition, using this method, we replenish and amend some elements abundance of the Allende Meteorite and Fish Clay Standard Reference Materials (SRMS), such as the Os literature value of the Allende Meteorite SRM is 0. 40-0. 77×10-6g/g, but our detecting value is 448-738× 10-9g/g, and the Pt abundance in the Allende Meteorite SRM is 1. 004-1. 471 × 10-6g/g, the Os and Pt abundance in the Fish Clay SRM are 396-400×10-9g/g and 248-316× 10-9g/g, respectively, which are not in the literature.