HPLC Method for Simultaneous Determination of Ascorbic acid, Phenylephrine, Paracetamol, Caffeine in Their Pure and Dosage Forms

Yara M. Elkady, Sobhy M. El-Adl, M. Baraka, M. Sebaiy
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Abstract

An isocratic HPLC method has been developed for determination of ascorbic acid, phenylephrine, paracetamol, and caffeine in their pure and tablet forms. Separation was carried out at room temperature on an Kinetex 2.6 C18 100A (4.6 mm × 100 mm) column using a mobile phase of 0.05 M potassium dihydrogen phosphate buffer (pH 3.50 by ortho-phosphoric acid): acetonitrile: methanol (70:20:10). The flow rate was 1 mL/min, maximum absorption was measured at 220 nm and linearity was in the range of 1-50 μg/mL for all drugs. The retention times of ascorbic acid, phenylephrine, paracetamol and caffeine were reported to be 1.83, 2.94, 3.74 and 5.13 minutes, respectively, indicating a very short analysis time compared with other reported methods. Also, limits of detection were reported to be 0.76, 0.82, 0.47 and 0.24 μg/mL for ascorbic acid, phenylephrine, paracetamol, and caffeine respectively, showing a high degree of the method sensitivity. The proposed method was validated in terms of linearity, accuracy, precision and robustness according to ICH guidelines and results were compared statistically with reference methods in respect of precision and accuracy.
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高效液相色谱法同时测定抗坏血酸、苯肾上腺素、对乙酰氨基酚、咖啡因的纯和剂型
建立了一种测定抗坏血酸、苯肾上腺素、扑热息痛和咖啡因纯品和片剂含量的HPLC法。采用Kinetex 2.6 C18 100A (4.6 mm × 100 mm)色谱柱,室温分离,流动相为0.05 M磷酸二氢钾缓冲液(正磷酸pH为3.50):乙腈:甲醇(70:20:10)。流速为1 mL/min,在220 nm处测得最大吸光度,在1 ~ 50 μg/mL范围内呈线性关系。据报道,抗坏血酸、苯肾上腺素、对乙酰氨基酚和咖啡因的保留时间分别为1.83、2.94、3.74和5.13分钟,与其他报道的方法相比,分析时间非常短。对抗坏血酸、苯肾上腺素、对乙酰氨基酚和咖啡因的检出限分别为0.76、0.82、0.47和0.24 μg/mL,具有较高的灵敏度。根据ICH指南对该方法进行线性、准确度、精密度和稳健性验证,并与参考方法的精密度和准确度进行统计比较。
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