In the condition of pH 2.5～4.7,ethyl eosin reacts with sildenafil to form red ion association complexes.The maximum absorption wavelengths and the maximum fading wavelengths were 550 nm and 520 nm,respectively.The ap...In the condition of pH 2.5～4.7,ethyl eosin reacts with sildenafil to form red ion association complexes.The maximum absorption wavelengths and the maximum fading wavelengths were 550 nm and 520 nm,respectively.The apparent molar absorptivities（ε）were 2.09×104 and 2.44×104L·mol-1·cm-1,respectively.When the dual-wavelength overlapping absorption spectrometry was used to determine the sidenafi,their apparent molar absorptivity ε was increased to 4.57×104 L·mol-1·cm-1.The method was applied to the determination of the content of the agora sell and in human urine sildenafils with satisfactory results.展开更多
文摘In the condition of pH 2.5～4.7,ethyl eosin reacts with sildenafil to form red ion association complexes.The maximum absorption wavelengths and the maximum fading wavelengths were 550 nm and 520 nm,respectively.The apparent molar absorptivities（ε）were 2.09×104 and 2.44×104L·mol-1·cm-1,respectively.When the dual-wavelength overlapping absorption spectrometry was used to determine the sidenafi,their apparent molar absorptivity ε was increased to 4.57×104 L·mol-1·cm-1.The method was applied to the determination of the content of the agora sell and in human urine sildenafils with satisfactory results.
