This article describes the method of quantitation of partially resolved peaks using multicomponent analysis (MCA) in high-performance liquid chromatography (HPLC) with diode array detection. MCA allows accurate quantitation and identification of unknown components even under partial or zero resolution conditions. It also provides a more thorough assessment of peak homogeneity compared to other purity assessment techniques. The method enables quantitation of small peaks fused to a major peak, even when they are not visually detected or integrated separately, without the need to select different optimum wavelengths to distinguish the compounds.
This document explains the application of Multicomponent Analysis (MCA) to HPLC Diode Array Detection for the quantitation of partially resolved peaks. It highlights that while diode array detectors allow for qualitative identification of compounds even when they are not completely resolved, traditional peak quantitation under these conditions is difficult. MCA overcomes this by evaluating a peak from start to end using known reference spectra, allowing for accurate quantitation and identification of unknown components without the need to select different optimum wavelengths.
| Column | Hamilton PRP-1 5 y, 4.1 mm x 150 mm |
|---|---|
| Column Temperature | 35.0°C |
| Flow Rate | 2.0 mL/min |
| Separation Mode | Isocratic |
| Wavelength Range | 210 - 367 nm |
| Sample Rate | 1.4 Hz |
| Run Time | 5.0 min |
MCA provides accurate quantitation and identification of unknown components based on known reference spectra, even when peaks are not visually detected or integrated separately.
MCA evaluates a peak from start to end, allowing small peaks fused to a major peak to be easily quantitated even when they are not visually detected.
The recommended wavelength range for the detector is 210 to 367 nm.