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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY · 2018 ·Vol. 316 ·期 1 ·411-417 · IF 1.181

Rapid determination of Pu isotopes for decommission concrete samples by inductively coupled plasma mass spectrometry

Wang Zhongtang,Wen Wei,Quan Wei,Du Liang,Wang Ping,Lin Jinxian,Xie Yun,Tan Zhaoyi

Plutonium is one of the key radionuclides in nuclear decommission. In this study, a rapid method was developed to analyze Pu for concrete samples using total digestion, CaF 2 /LaF 3 coprecipitation, extraction chromatography using TEVA and DGA resins, and ICP-MS measurement. The whole analytical process can be achieved within 2 days, with sufficiently high decontamination factors of interfering elements and high Pu chemical recovery (57–93%). The high throughput (22 samples/2 days) and low LODs (0.008 mBq g −1 for 239 Pu and 0.02 mBq g −1 for 240 Pu) allow this method to effectively detect low level Pu contamination in concrete samples.

CAS / MDL: 50-81-7 10043-35-3 13477-34-4 5470-11-1 7664-39-3 10277-43-7 7697-37-2 7601-90-3 7632-00-0 7647-01-0 7705-07-9

研究领域: 分析化学 · 核科学与技术 · 环境科学

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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES · 2023 · IF 8.2

Xylan derived carbon dots composite with PCL/PLA for construction biomass nanofiber membrane used as fluorescence sensor for detection Cu2+ in real samples

Xiaoci Cui,Yingying Zhang,Zhiyuan Chen,Huining Xiao,Ranhua Xiong,Chaobo Huang

Water and soil pollution caused by Cu 2+ is not conducive to sustainable development of environment and could cause damage to environment and even human body. Currently, fluorescent sensor solutions analysis method has been used for Cu 2+ detection, but they also suffer from drawbacks including easy leakage, difficult storage, and inaccurate. Herein, a green solid-state biomass fluorescence platform (NBU-CDs) consisting of xylan-derived carbon dots (U-CDs) and polylactic acid/polycaprolactone (PLA/PCL) was designed by using in situ electrospinning technology. The prepared NBU-CDs fluorescence platform showed good fluorescence effect and can be served as fluorescence sensor for detecting Cu 2+ with high sensitively, selectively and low detection limit (LOD = 0.83 μM). The practical applications of NBU-CDs exhibited high specificity for Cu 2+ detection in zebrafish, water samples (school lake, Xuanwu Lake and Yangtze River) with high recovery rates of 97 %–104 % and soil (pond soil, grassland soil and bamboo soil) samples, respectively. The developed fluorescence platform was utilized to predict water and soil safety by monitoring Cu 2+ concentration and provides a new strategy for Cu 2+ detection.

CAS / MDL: 9002-98-6 57-13-6 9014-63-5 14306-25-3

研究领域: 环境科学 · 材料科学 · 分析化学 · 生物技术

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Rapid determination of Pu isotopes for decommission concrete samples by inductively coupled plasma mass spectrometry

Xylan derived carbon dots composite with PCL/PLA for construction biomass nanofiber membrane used as fluorescence sensor for detection Cu2+ in real samples