Spectrophotometric curves overlapping

Overlapping spectrophotometric curves—The multidye system contained dyes whose spectrophotometric curves overlapped, hindering simple analysis. A 16-point computer program, in... 

Nemutlu et al. [22,23] reported the determination of lornoxicam in pharmaceutical preparations by using spectrophotometric and chromatographic methods. Derivative UV spectrum of lornoxicam was used to resolve overlapping bands at 258 and 288 nm and to increase the linearity range of calibration curve. A good resolution and sensitivity for lornoxicam was observed with the first-order derivative spectrophotometry. 

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