Amr Mohamed A, Helal Abdul-Fattah I, Al-Kinani Athab T, Balakrishnan Perumal
Central Laboratories Unit, Qatar University, P.O. Box 2713, Doha, Qatar; Nuclear Physics Department, NRC, Atomic Energy Authority, Cairo, 13759, Egypt.
Nuclear Physics Department, NRC, Atomic Energy Authority, Cairo, 13759, Egypt.
J Environ Radioact. 2016 Mar;153:73-87. doi: 10.1016/j.jenvrad.2015.12.008. Epub 2015 Dec 28.
The development of practical, fast, and reliable methods for the ultra-trace determination of anthropogenic radionuclides (90)Sr, (137)Cs, (238)Pu, (239)Pu, and (240)Pu by triple quadruple collision/reaction cell inductively coupled plasma mass spectrometry (CRC-ICP-MS/MS) were investigated in term of its accuracy and precision for producing reliable results. The radionuclides were extracted from 1 kg of the environmental soil samples by concentrated nitric and hydrochloric acids. The leachate solutions were measured directly by triple quadrupole CRC-ICP-MS/MS. For quality assurance, a chemical separation of the concerned radionuclides was conducted and then measured by single quadrupole-ICP-MS. The developed methods were next applied to measure the anthropogenic radionuclides (90)Sr, (137)Cs, (238)Pu, (239)Pu, and (240)Pu in soil samples collected throughout the State of Qatar. The average concentrations of (90)Sr, (137)Cs, (238)Pu, (239)Pu, and (240)Pu were 0.606 fg/g (3.364 Bq/kg), 0.619 fg/g (2.038 Bq/kg), 0.034 fg/g (0.0195 Bq/kg), 65.59 fg/g (0.150 Bq/kg), and 12.06 fg/g (0.103 Bq/kg), respectively.
研究了采用三重四极杆碰撞/反应池电感耦合等离子体质谱法（CRC-ICP-MS/MS）对人为放射性核素（90）Sr、（137）Cs、（238）Pu、（239）Pu和（240）Pu进行超痕量测定的实用、快速且可靠的方法，评估了其产生可靠结果的准确性和精密度。通过浓硝酸和盐酸从1千克环境土壤样品中提取放射性核素。浸出液直接用三重四极杆CRC-ICP-MS/MS进行测量。为确保质量，对相关放射性核素进行化学分离，然后用单四极杆ICP-MS进行测量。接下来将所开发的方法应用于测量卡塔尔全国采集的土壤样品中的人为放射性核素（90）Sr、（137）Cs、（238）Pu、（239）Pu和（240）Pu。（90）Sr、（137）Cs、（238）Pu、（239）Pu和（240）Pu的平均浓度分别为0.606 fg/g（3.364 Bq/kg）、0.619 fg/g（2.038 Bq/kg）、0.034 fg/g（0.0195 Bq/kg）、65.59 fg/g（0.150 Bq/kg）和12.06 fg/g（0.103 Bq/kg）。
