ArticleMikrochimica acta2026
Low-temperature and rapid determination of water content in solid samples using a MAPbBr
Article in Mikrochimica acta, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Lowering the heating temperature can reduce matrix interference in the heating evaporation method, but it also places higher demands on the water sensitivity of the sensing material. Owing to the presence of the methylammonium component, MAPbBr3 organic-inorganic hybrid perovskite quantum dots (PQDs) exhibit higher water sensitivity compared to pure inorganic PQDs. Therefore, this study reports the fabrication of a MAPbBr3/SiO2 paper-based water content sensor. This sensor enables rapid (10 min) and low-temperature (50℃) detection of water content in solid samples, reducing the overall analysis by 61.5% compared with sensors based on pure inorganic PQDs. The sensor exhibits a linear detection range of 0.5%–21% for Codonopsis pilosula samples, with a limit of detection of 0.34%. The results obtained using this method show good agreement with the oven-drying method recommended by the Chinese Pharmacopoeia, with a relative error of no more than 2.38%, as well as acceptable reproducibility (RSD ≤ 8.85%) and recoveries ranging from 95.7% to 103.8%. This study demonstrates the potential of MAPbBr3 organic–inorganic hybrid PQDs for rapid, low-temperature, and sensitive detection of water content in solid samples.
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