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A novel molecularly imprinted electrochemical sensor based on nitrogen‐doped molybdenum carbide(N−Mo2C) nanosphere was fabricated for trace analysis of resveratrol in this work. N−Mo2C with large specific surface area and good electrical conductivity was introduced to construct a sensitive imprinting platform. Molecularly imprinted polymer film was prepared through a simple electropolymerization method using resveratrol as the template molecule and o‐phenylenediamine as the functional monomer. The sensor shows great analytical performance in the concentration range of 10−9 mol L−1 to 10−4 mol L−1and the detection limit is as low as 4.37×10−10 mol L−1. The sensor also has the advantages of good selectivity, reproducibility and stability, which opens a new way for the application of molecularly imprinted electrochemical sensors in the field ofbiomedicine detection. [ABSTRACT FROM AUTHOR]

The chlorination roasting -- water leaching process was adopted to extract rubidium, lithium and potassium from a tungsten tailing. The effects of tailings particle size, chlorination dosage, roasting temperature and time, liquid-to-solid mass ratio and water leaching temperature during water leaching on leaching of rubidium, lithium and potassium were examined. The results show that the leaching of rubidium, lithium and potassium are 87.6%,75.9% and 75.6%, respectively at the following experimental condition of tailing particle size of -0.5 mm accounting 95%, roasting temperature of 950 °C, roasting time of 2 h and CaCl2, NaCl and tailings mass ratio of 3 : 3 : 10, then the calcined product is leached using pure water with the conditions of liquid-to-solid mass ratio of 2 : 1 and leaching time of 2 h. The rubidium,lithium and potassium in the tungsten tailings can be leaching effectively by the process. [ABSTRACT FROM AUTHOR]

A novel molecularly imprinted electrochemical sensor based on nitrogen-doped molybdenum carbide(N-Mo 2 C) nanosphere was fabricated for trace analysis of resveratrol in this work. N-Mo 2 C with large specific surface area and good electrical conductivity was introduced to construct a sensitive imprinting platform. Molecularly imprinted polymer film was prepared through a simple electropolymerization method using resveratrol as the template molecule and o-phenylenediamine as the functional monomer. The sensor shows great analytical performance in the concentration range of 10 -9  mol L -1 to 10 -4  mol L -1 and the detection limit is as low as 4.37×10 -10  mol L -1 . The sensor also has the advantages of good selectivity, reproducibility and stability, which opens a new way for the application of molecularly imprinted electrochemical sensors in the field ofbiomedicine detection., (© 2022 Wiley-VCH GmbH.)