Classification of forensic soil evidences by application of THM-PyGC/MS and multivariate analysis

Lee, Choong-Sik; Sung, T. M.; Kim, Hyong Seong; Jeon, Chung Hyun

doi:10.1016/j.jaap.2012.02.017

Cited by 28 publications

(20 citation statements)

References 43 publications

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“…The Organic Spectra Peak Assignment. According to the previous investigation about the infrared spectra of soil organic matter (SOMs) [4][5][6][7], the peak assignments from S1 to S18 were analyzed. As shown in Figure 1, the peak assignment was varied with the soil source.…”

Section: Resultsmentioning

confidence: 99%

Detection of Nanoscale Soil Organic Matter by Middle Infrared Spectrum for Forensic Science

Liu

et al. 2015

Journal of Chemistry

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Soil is useful as a kind of trace evidence for forensic science. Thus it is very crucial to identify sources of soil. The nanoscale soil organic matter (NSOMs) can be used to differentiate soil sources because their constituents and contents are relatively stable with time but variant by location. In this study, NSOMs from eighteen regions of Shandong Province in China were examined by middle infrared spectrum (4000–400 cm−1). The results showed that the constituents and contents of NSOMs in eighteen samples were dramatically different; a NSOM fingerprint for each sample was drawn based on these characteristics. This suggests that a national or global NSOM fingerprint database could be rapidly established by the one-step middle infrared spectrum analysis for different soil samples, which will be helpful to determine crime scenes by comparing the middle infrared spectrum of forensic soil with the NSOMs fingerprint database.

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Section: Resultsmentioning

confidence: 99%

Detection of Nanoscale Soil Organic Matter by Middle Infrared Spectrum for Forensic Science

Liu

et al. 2015

Journal of Chemistry

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“…More recently, for statistical representation, multivariate analysis has become popular among the researchers for forensic discrimination of samples of paper [16], inks [17–20], toner [21], counterfeit currency [22], determination of age [23], examination of soil [24], analysis of fibers [25], and nuclear forensic [26]. In this study, the sample size (n=5 replica) is too small to run multivariate analysis.…”

Section: Introductionmentioning

confidence: 99%

Forensic Discrimination Potential of Blue, Black, Green, and Red Colored Fountain Pen Inks Commercially Used in Pakistan, by UV/Visible Spectroscopy, Thin Layer Chromatography, and Fourier Transform Infrared Spectroscopy

Sharif

Batool

Chand

et al. 2019

International Journal of Analytical Chemistry

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Examination and comparison of fountain pen inks are very important in forensic questioned documents examination in developing countries where the chances of fraud are greater in cases of cheques, marriage papers, entry of birth and death, etc. In this study, fountain pen inks of blue, black, green, and red colours that are commercially used in Pakistan have been discriminated by UV-Vis spectroscopy, TLC, and FTIR spectroscopy. We have calculated and compared the results in terms of discriminating power. UV/Visible Spectroscopy of fountain pen inks of different brands showed different composition despite their similar colours. TLC was effectively used to differentiate between the colored components of inks. FTIR results showed that each brand could be distinguished by studying the pattern of their absorption spectra that appeared due to the presence of different functional groups. On the basis of combined results of UV-VIS, TLC, and FTIR, the DP was found from 0.73-0.8 for blue, 0.80-1.0 for black, 0.5-1.0 for green, and 1.0 for red colored fountain pen inks. Overall, this study demonstrated the elevated worth of analysis of fountain pen inks commercially used in Pakistan as the study for fountain pen inks, while not very common, remains an interesting target study.

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“…Particulate organic matter (POM) plays key roles in aquatic ecosystems, controlling the transfer and the bioavailability of energy, nutrients and micropollutants. The flux of POM from soils to oceans has been estimated at 0.2 Gt C year −1 (Ludwig et al, 1996), with 80 % coming from biospheric inputs and the complement from petrogenic inputs (Galy et al, 2015). Assuming that the energy provided by natural organic matter is equivalent to the energy provided by the combustion of wood, this flux of POM corresponds to an energy of 2.8 EJ, that is to say less than 2 days of the global energy consumption by humanity in 2015 (yearbook.enerdata.net).…”

Section: Introductionmentioning

confidence: 99%

Molecular fingerprinting of particulate organic matter as a new tool for its source apportionment: changes along a headwater drainage in coarse, medium and fine particles as a function of rainfalls

2018

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Abstract. Tracking the sources of particulate organic matter (POM) exported from catchments is important to understand the transfer of energy from soils to oceans. The suitability of investigating the molecular composition of POM by thermally assisted hydrolysis and methylation using tetramethylammonium hydroxide directly coupled to gas chromatography and mass spectrometry is presented. The results of this molecular-fingerprint approach were compared with previously published elemental (% C, % N) and isotopic data (δ13C, δ15N) acquired in a nested headwater catchment in the Piedmont region, eastern United States of America (12 and 79 ha). The concordance between these results highlights the effectiveness of this molecular tool as a valuable method for source fingerprinting of POM. It emphasizes litter as the main source of exported POM at the upstream location (80±14 %), with an increasing proportion of streambed (SBed) sediment remobilization downstream (42 ± 29 %), specifically during events characterized by high rainfall amounts. At the upstream location, the source of POM seems to be controlled by the maximum and median hourly rainfall intensity. An added value of this method is to directly investigate chemical biomarkers and to mine their distributions in terms of biogeochemical functioning of an ecosystem. In this catchment, the distribution of plant-derived biomarkers characterizing lignin, cutin and suberin inputs were similar in SBed and litter, while the proportion of microbial markers was 4 times higher in SBed than in litter. These results indicate that SBed OM was largely from plant litter that has been processed by the aquatic microbial community.

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Classification of forensic soil evidences by application of THM-PyGC/MS and multivariate analysis

Cited by 28 publications

References 43 publications

Detection of Nanoscale Soil Organic Matter by Middle Infrared Spectrum for Forensic Science

Detection of Nanoscale Soil Organic Matter by Middle Infrared Spectrum for Forensic Science

Forensic Discrimination Potential of Blue, Black, Green, and Red Colored Fountain Pen Inks Commercially Used in Pakistan, by UV/Visible Spectroscopy, Thin Layer Chromatography, and Fourier Transform Infrared Spectroscopy

Molecular fingerprinting of particulate organic matter as a new tool for its source apportionment: changes along a headwater drainage in coarse, medium and fine particles as a function of rainfalls

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