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利用分光光度法研究Ｎｐ（Ｖ）在近中性溶液中的水解反应。获得在不同ｐＨ值下该核素的吸收光谱，求出其一级水解常数；并证明当ｐＨ＞１０时，Ｎｎ（Ｖ）发生二级水解并生成带负电荷的水解产物。
Study on the hydrolysis of Np (V) in near neutral solution by spectrophotometry. Obtained at different pH values of the absorption spectrum of the nuclide, obtained the first-order hydrolysis constants; and when pH> 10, Nn (V) secondary hydrolysis and generate negatively charged hydrolyzate.