- 作者: 李全民,張甜甜
- 作者服務機構: College of Chemistry and Environmental Science, Henan Normal University; Henan Key Laboratory for Environmental Pollution Control, Xinxiang, Henan 453007, P. R. China
- 中文摘要: It is the first time that boron has been used as a chromogenic agent to determine aminomethylbenzoic acid (PAMBA) by the fading spectrophotometric method in this paper. The study indicates that at pH 10.00 the absorbance of PAMBA decreases when boric acid (BA) is added to the solution. A simple, rapid, sensitive and reliable novel method based on the product of PAMBA and BA is obtained. The stoichiometric ratio of the product is 1:2. Beer’s law is obeyed in the range of PAMBA concentrations of 0.13 ~ 38.40 mg/mL at a wavelength of 242 nm (e242 is 8.1 ’ 104 L/mol/cm). The equation of linear regression is A = -0.06635 - 0.02914C (’ 10-5 M), with a linear correlation coefficient of 0.9974. The detection limit is 0.12 mg/mL and RSD 0.11%. The method is successfully applied to the determination of PAMBA in pharmaceutical samples, and average recoveries from pharmaceutical samples and urine samples were between 98.4 ~ 102.5%. The other components in these samples do not interfere with the determination by the proposed method.
- 英文摘要: --
- 中文關鍵字: Boron; Aminomethylbenzoic acid; Chromogenic agent; Fading spectrophotometric method.
- 英文關鍵字: --