1. Department of Forensic Medicine, Xi’an Jiaotong University, Xi’an 710061, China 2. Laboratory of National Key Subject for Forensic Science, Xi’an Jiaotong University, Xi’an 710061, China 3. Department of Pharmacy, Xi’an Jiaotong University, Xi’an 710061, China
Abstract：Fourier transform infrared spectroscopy (FTIR) was applied to study the decomposition process postmortem in rat lung tissue and provided a new method for the estimation of postmortem interval (PMI). The results demonstrated that, with the PMI increasing, the peak position of main absorbance bands showed no significant difference, but there was obvious variance of intensity: (1) The intensity of 1 080 and 1 241 cm-1 related to nucleic acid tended to decrease. (2) The intensity ratio at Amide Ⅰ(I1647) and Ⅱ(I1541) decreased since death. The intensity of 1338 and 1313cm-1 increased lightly. (3) The intensity at 1460, 1400 and 1170 cm-1 showed no significant difference. (4) A new band at 1120 cm-1 appeared since 72h after death and its intensity increased from 72 to 144 h postmortem. The authors’ preliminary results suggest that it may be possible for FTIR to become an effective method to estimate the PMI in forensic practice.
黄平1,田卫平1,2,杨广德3,托娅1,2,王振原1* . 大鼠死后肺脏FTIR光谱变化与死亡时间的关系[J]. 光谱学与光谱分析, 2007, 27(10): 1962-1965.
HUANG Ping1,TIAN Wei-ping1, 2,YANG Guang-de3,TUO Ya1,2,WANG Zhen-yuan1* . Study on Estimation of Postmortem Interval Using FTIR in Rat Lung. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(10): 1962-1965.
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