Estimation of the post-mortem interval in human bones by infrared spectroscopy

Baptista, Andreia; Pedrosa, Mariana; Curate, Francisco; Ferreira, Maria Teresa; Marques, M. P. M.

doi:10.1007/s00414-021-02641-9

Cited by 16 publications

(13 citation statements)

References 60 publications

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“…Analysis of mineral content of samples of femur and humerus by this technique revealed a decrease in the crystallinity index and in the ratio between the two types of carbonate A and B. These tow markers have been proposed as a useful mean for PMI determination [107]. Further ATR-FTIR-based researches have been carried out on human bones to investigate their use in the long-term prediction of PMI [6,126].…”

Section: Pmi Estimation Using Cartridges and Bonesmentioning

confidence: 95%

Attenuated total reflection-Fourier transform infrared spectroscopy: a universal analytical technique with promising applications in forensic analyses

Alkhuder

2022

Int J Legal Med

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Contemporary criminal investigations are based on the statements made by the victim and the eyewitnesses. They also rely on the physical evidences found in the crime scene. These evidences, and more particularly biological ones, have a great judicial value in the courtroom. They are usually used to revoke the suspect's allegations and confirm or refute the statements made by the victim and the witnesses. Stains of body fluids are biological evidences highly sought by forensic investigators. In many criminal cases, the success of the investigation relies on the correct identification and classification of these stains. Therefore, the adoption of reliable and accurate forensic analytical methods seems to be of vital importance to attain this objective. Attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) is a modern and universal analytical technique capable of fingerprint recognition of the analyte using minimal amount of the test sample. The current systematic review aims to through light on the fundamentals of this technique and to illustrate its wide range of applications in forensic investigations. ATR-FTIR is a nondestructive technique which has demonstrated an exceptional efficiency in detecting, identifying and discriminating between stains of various types of body fluids usually encountered in crime scenes. The ATR-FTIR spectral data generated from bloodstains can be used to deduce a wealth of information related to the donor species, age, gender, and race. These data can also be exploited to discriminate between stains of different types of bloods including menstrual and peripheral bloods. In addition, ATR-FTIR has a great utility in the postmortem investigations. More particularly, in estimating the postmortem interval and diagnosing death caused by extreme weather conditions. It is also useful in diagnosing some ambiguous death causes such as fatal anaphylactic shock and diabetic ketoacidosis.

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Section: Pmi Estimation Using Cartridges and Bonesmentioning

confidence: 95%

Attenuated total reflection-Fourier transform infrared spectroscopy: a universal analytical technique with promising applications in forensic analyses

Alkhuder

2022

Int J Legal Med

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“…While no model has been created yet, this is a major step in the right direction. 269 Another advancement in vibrational spectroscopy is the use of hand-held instruments. This is especially useful in the field of forensic anthropology because it enables on-site determination of varied factors of the remains.…”

Section: ■ Physics/pattern Interpretationmentioning

confidence: 99%

“…Comparing these ratios showed increases in the carbonate content with increasing PMI and decreases in the crystallinity index with increasing PMI. While no model has been created yet, this is a major step in the right direction . Another advancement in vibrational spectroscopy is the use of hand-held instruments.…”

Section: Medicinementioning

confidence: 99%

Innovative Vibrational Spectroscopy Research for Forensic Application

et al. 2023

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“…In addition to the aforementioned techniques, other studies have focused on applying Fourier transform infrared spectroscopy (FTIR) in order to distinguish postmortem changes in various types of samples, such as human or animal tissue [ 20 , 21 , 22 ]. FTIR has also been used for postmortem studies in bone samples [ 7 , 23 ]. These works show that it is possible to distinguish between ancient and recent human bone by the crystallinity index and carbonate/phosphate index obtained from the FTIR spectra [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Partners in Postmortem Interval Estimation: X-ray Diffraction and Fourier Transform Spectroscopy

Rubio

Suárez

Martín‐de‐las‐Heras

et al. 2023

IJMS

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The postmortem interval (PMI) is difficult to estimate in later stages of decomposition. There is therefore a need to develop reliable methodologies to estimate late PMI. This study aims to assess whether there is a correlation between changes in the mineral composition of human teeth and the estimation of PMI. X-ray diffraction (XRD) and attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy techniques were performed to address this challenge. Forty healthy human teeth obtained from odontological clinics were stored at different times (0, 10, 25, 50 years; N = 10/group). XRD and ATR-FTIR parameters related to the structure and composition of teeth were studied. Our results showed that the crystallinity index, crystal size index, mineral-to-organic matrix ratio (M/M) and carbonate/phosphate ratio (C/P) had the strongest association with PMI. For larger PMIs, there was a significant increase in crystallinity, crystal size and M/M ratio, while the C/P ratio showed a specific decrease with increasing PMI. According to our results, the parameters of crystallinity, crystal size, M/M ratio and C/P ratio can be considered highly accurate in determining a PMI of 10 years of data; crystallinity and mineral maturity can be considered useful in determining a PMI of 25 years; and crystallinity and mineral maturity can be considered highly accurate in determining a PMI of 50 years. A particular XRD index was identified as the most suitable parameter to estimate PMI: crystallinity. The joint use of XRD and ATR-FTIR analyses could be a promising alternative for dating human teeth.

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Estimation of the post-mortem interval in human bones by infrared spectroscopy

Cited by 16 publications

References 60 publications

Attenuated total reflection-Fourier transform infrared spectroscopy: a universal analytical technique with promising applications in forensic analyses

Attenuated total reflection-Fourier transform infrared spectroscopy: a universal analytical technique with promising applications in forensic analyses

Innovative Vibrational Spectroscopy Research for Forensic Application

Partners in Postmortem Interval Estimation: X-ray Diffraction and Fourier Transform Spectroscopy

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