UV-Vis and ATR-FTIR spectroscopic investigations of postmortem interval based on the changes in rabbit plasma.

ABSTRACT: Estimating PMI is of great importance in forensic investigations. Although many methods are used to estimate the PMI, a few investigations focus on the postmortem redistribution. In this study, ultraviolet-visible (UV-Vis) measurement combined with visual inspection indicated a regular diffusion of hemoglobin into plasma after death showing the redistribution of postmortem components in blood. Thereafter, attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy was used to confirm the variations caused by this phenomenon. First, full-spectrum partial least-squares (PLS) and genetic algorithm combined with PLS (GA-PLS) models were constructed to predict the PMI. The performance of GA-PLS model was better than that of full-spectrum PLS model based on its root mean squar

SUBMITTER: Wang Q 

PROVIDER: S-EPMC5533326 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature