Ei Ei Thin. Simultaneous determination of HIV-1 protease inhibitors lopinavir and retonavir in syrup by chemometrics-assisted spectrophotometric approach and HPLC method. Master's Degree(Pharmaceutical Chemistry). Mahidol University. Mahidol University Library and Knowledge Center. : Mahidol University, 2009.
Simultaneous determination of HIV-1 protease inhibitors lopinavir and retonavir in syrup by chemometrics-assisted spectrophotometric approach and HPLC method
Abstract:
Lopinavir (LPV) and ritonavir (RTV) are HIV-1 protease inhibitors (PIs) and
are used in combination as antiviral drugs. Quantitative determinations for these two
drugs or other PIs have been done by the liquid chromatographic method with various
detectors. In this study, chemometrics-assisted spectrophotometric method was
proposed for the simultaneous determination of LPV and RTV in syrup.
A set of calibration samples was created by using a central composite design
(CCD). The UV absorbance spectra of the resulting samples were subjected to partial
least square regression (PLS-1) and principal component regression (PCR). The
optimum numbers of PLS-1 and PCR factors were selected according to the predictive
residual sum of squares (PRESS) values of leave-one-out cross-validation. A HPLC
method was developed and also employed for comparison. The mean recoveries of
LPV and RTV in validation set were 102.87 (±3.58 %) and 100.06 (±7.93 %) for PLS-
1, 104.00 (± 2.02 %) and 99.32 (± 8.65 %) for PCR and 100.71 (± 0.92) and 102.51 (±
3.15 %) for HPLC. The determination results of the validation set showed that the data
obtained by PLS-1 and PCR were comparable with those obtained by HPLC method,
except for the PCR model for lopinavir. An amount of LPV and RTV was also
obtained from syrup (oral solution sample) using PLS-1, PCR and HPLC methods.