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Química Nova

On-line version ISSN 1678-7064


SCARMINIO, Ieda Spacino et al. Q mode factor multivariate calibration for systems with overlapped bands. Quím. Nova [online]. 1998, vol.21, n.5, pp. 590-596. ISSN 1678-7064.

A multivariate calibration method to determine chemical compositions of systems with severely overlapped bands is proposed. Q mode factors are determined from the spectral data and subsequently rotated using the varimax and oblique transformation of Imbrie. The method is applied to two sets of simulated data to test the sensitivity of analytical results to random experimental error. The chemical concentrations of alanine and threonine mixture are determined from spectral data of the 302,5 - 548,5 nm region.

Keywords : factor analysis; aminoacids; overlapped bands.

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