Journal of Forensic Medicine

›› 2016, Vol. 32 ›› Issue (1): 21-25.DOI: 10.3969/j.issn.1004-5619.2016.01.005

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Relationship between PMI and ATR-FTIR Spectral Changes in Swine Costal Cartilages and Ribs

YAO YAO1,2, WANG QI1, JING XIAO-LI2, LI BING1, ZHANG YIN-MING1, WANG ZHI-JUN1, LI CHENG-ZHI1, LIN HAN-CHENG1, ZHANG JI1, HUANG PING3, WANG ZHEN-YUAN1     

  1. （1. School of Forensic Science and Medicine, Xi’an Jiaotong University, Xi’an 710061, China; 2. Gaoxin Branch of Xi’an Public Security Bureau, Xi’an 710065, China; 3. Shanghai Key Laboratory of Forensic Medicine, Institute of Forensic Science, Ministry of Justice, P.R.China, Shanghai 200063, China）
  • Online:2016-02-25 Published:2016-02-28

Abstract: Objective To analyze postmortem chemical changes in Landrace costal cartilages and ribs using attenuated total reflection-Fourier transform infrared （ATR-FTIR） spectroscopy, and to provide a novel technique for estimation of postmortem interval （PMI）. Methods The swines were sacrificed by hemorrhage and their costal cartilages and ribs were kept in 20 ℃. The chemical analysis of the costal cartilages and ribs were performed using ATR-FTIR every 72 h. The correlation between the certain spectral parameters and PMI was also analyzed. The time-dependent changes of costal cartilages were more significant than ribs. Results There were no obvious changes for the main absorbance bands position, and some absorbance band ratios showed time-dependent changes and significant correlations with the PMI. Conclusion ATR-FTIR has the ability to analyze postmortem chemical changes of the swine costal cartilages and ribs, and it can be a new method to estimate PMI based on spectroscopy.

Key words:  forensic pathology, spectroscopy, Fourier transform infrared, attenuated total reflection, ribs, costal cartilage, postmortem interval, swine

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