Smart chemometrics-assisted spectrophotometric methods for efficient resolution and simultaneous determination of paracetamol, caffeine, drotaverine HCl along with three of their corresponding related impurities

智能化学计量学辅助分光光度法可有效分离并同时测定对乙酰氨基酚、咖啡因、盐酸屈他维林及其三种相应的相关杂质