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本研究用零交点二阶导数UV分光光度法同时测定阿司匹林缓释片中的水杨酸(ASA)和乙酰水杨酸(SA),它们的零级吸收光谱和二阶导数光谱均在乙腈-甲酸(99∶1)稀溶液中记录。其校准曲线由导数吸光度值(DA)对浓度(c)绘图,呈直线。SA的回归方程为:DA=1.045×10-4×c-2.011×10-5;A...
In this study, the simultaneous determination of ASA and SA using aspirin sustained-release tablets by the second-order derivative zero-cross-point UV spectrophotometry showed that both the zero-order absorption spectra and the second- Formic acid (99: 1) diluted solution. The calibration curve is plotted from the derivative absorbance value (DA) to concentration (c) in a straight line. The regression equation of SA is: DA = 1.045 × 10-4 × c-2.011 × 10-5; A