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在一定条件下,Tb(IV)的碱式碳酸盐可以溶解在醋酸的水溶液中形成红棕色络合物,该络合物组成为 Tb(CH_3COO)_4,络合物在300—345nm 波长附近有一宽带特征吸收峰.消光值在0—0.5范围内与 Tb(IV)的波度具有直线关系.分光光度法对 Tb(IV)的自还原反应研究确定,在常温和醋酸浓度一定条件下,pH 小于8.5时. 随 PH 值的升高,自还原反应速度常数减少.该自还原反应的级数为二.
Under certain conditions, the basic carbonate of Tb (IV) can be dissolved in aqueous solution of acetic acid to form a reddish brown complex, which is composed of Tb (CH_3COO) _4 and the complex is near the wavelength of 300-345nm There is a broad band characteristic absorption peak.The extinction value has a linear relationship with the Tb (IV) waveband in the range of 0-0.5.The determination of self-reduction of Tb (IV) by spectrophotometry was studied. Under certain conditions of normal temperature and acetic acid concentration, When the pH is less than 8.5, the self-reduction reaction rate constant decreases with increasing PH value, and the number of self-reduction reactions is two.