双波长分光光度法测定对一氨基苯胂酸中的邻一氨基苯胂酸

Determination of O-Aminophenylarsonic Acid in P-Aminophenylarsonic Acid by Dual-Wavelength Spectrophotometry

研究了不同酸性介质中邻一氨基苯胂酸（简称Ｏ－ＡＡ）和对－氨基苯胂酸（简称Ｐ－ＡＡ）的吸收光谱。建立了双波长分光光度法在０．３０ｍｏｌ·Ｌ－１ＨＣＩ介质中测定Ｏ－ＡＡ的新方法，己应用于作为饲料添加剂用的Ｐ－ＡＡ中微量Ｏ－ＡＡ的测定，得到满意的结果。

The absorption spectra of O-AA and P-AA were investigated in a different acid medium. A new dual-wavelength spectrophotometry has been developed for the determination of O-AA at 0.30mol·L -1 HCl. The method was applied to the determination of microamount O-AA in P-AA as feed additive with satisfactory result.