The forensic analysis of soil organic by FTIR

Cox, Ryan; Peterson, H. L.; Young, Jin; Cusik, C; Espinoza, Edgard O.

doi:10.1016/s0379-0738(99)00203-0

Cited by 96 publications

(57 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If the interaction between the components results in a change in the spectral properties of either one or both of the components, the changes can be observed in the difference spectra. Cox, et al (2000) proposed the spectral subtraction for forensic analysis of SOM. In this method, soil is heated to combust the OM present in the soil and leaving the mineral component.…”

Section: Spectral Subtractionmentioning

confidence: 99%

Recent applications of vibrational mid-Infrared (IR) spectroscopy for studying soil components: a review

Tinti¹,

Tugnoli²,

Bonora³

et al. 2015

j. cent. eur. agric.

184

View full text Add to dashboard Cite

The present review highlights the recent applications of mid-infrared spectroscopy and in particular of diffuse reflectance spectroscopy (DRIFT) and attenuated total reflectance (ATR) and processing methods (e.g., deconvolution, derivative and chemometrics) to rapidly provide valuable information on soil composition and organic geochemistry. Research has demonstrated that both DRIFT and ATR techniques can be considered useful tools for the analysis of a large number of soil samples, giving not only typical spectral patterns but permitting an accurate prediction of quantitative parameters such as, e.g., total carbon, total nitrogen, C/N ratio, lignin, dissolved OC, carbonyl-C, aromatic-C, O-alkyl-C, and alkyl-C contents. Based on literature results, infrared spectroscopy can be recognized as one of the most promising analytical techniques for investigating soil science.

show abstract

Section: Spectral Subtractionmentioning

confidence: 99%

Recent applications of vibrational mid-Infrared (IR) spectroscopy for studying soil components: a review

Tinti¹,

Tugnoli²,

Bonora³

et al. 2015

j. cent. eur. agric.

184

View full text Add to dashboard Cite

show abstract

“…Shallow (0-20 cm) and deep (50 cm plus) samples of whole soil from each of the four sites were scanned before and aft er ashing at 550°C for 3 h. We used GRAMS/AI soft ware, Version 7.02 (Th ermo Galactic, Salem, NH) to perform spectral subtraction of ashed from unashed samples, to to bring out the OM spectral features and diff erentiate them from the mineral features (Cox et al, 2000, Sarkhot et al, 2007.…”

Section: Sitementioning

confidence: 99%

Chemical Differences in Soil Organic Matter Fractions Determined by Diffuse‐Reflectance Mid‐Infrared Spectroscopy

Calderón

Reeves

Collins

et al. 2011

Soil Science Soc of Amer J

148

View full text Add to dashboard Cite

U nderstanding SOM composition and cycling is fundamental because SOM contains large nutrient pools for crop growth, aff ects the soil physical properties necessary for roots to thrive, and can serve as a source or a sink for atmospheric CO 2 (Lal, 2004). Th e stability of soil organic carbon (SOC) is determined by interactive eff ects of climate, parent material, soil depth, and agronomic management (Collins et al., 2000), and there is still much to be learned about OM quality and dynamics.One approach to the study of SOM quality is fractionation by particle size and settling characteristics. Th e fractions consist of the LF made up of low density plant material, the POM included with the sand-sized material and protected C in aggregates, and the silt (silt) and clay-size (clay) separates (Haile-Mariam et al., 2008). Soil fractionation has given insight into the complexity of SOM, uncovering a range of C age, N content, and chemical makeup (Paul et al., 2001). In Corn Belt soils, the LF and POM contain relatively labile C and can comprise up to 5 and 11% of the SOC, respectively (Haile-Mariam et al., 2008). Th e LF contains plant residues and has a shorter C turnover time than the other particle-size fractions. In contrast, the silt and clay fractions tend to have more recalcitrant C than the other fractions (Christensen, 1987).Extended laboratory incubations help characterize soils because the active C pools are transformed by microbial enzymes while the resistant SOC is less aff ected We performed mid-infrared (MidIR) spectral interpretation of fractionated fresh and incubated soils to determine changes in soil organic matter (SOM) chemistry during incubation. Soils from four sites and three depths were processed to obtain the light fraction (LF), particulate organic matter (POM), silt-sized (silt), and clay-sized (clay) fractions. Our results show that the LF and clay fractions have distinct spectral features regardless of site. Th e LF is characterized by absorbance at 3400 cm −1 , as well as between 1750 and 1350 cm −1 . Th e clay fraction is distinguished by absorption near 1230 cm −1 , and absorption at 780 to 620 cm −1 . Th e POM, like the LF, absorbs at the broad peak at 1360 cm −1 . High SOM soils are characterized by absorbance at 1230 cm −1 , a band for aromatics, possibly associated with resistant C. Soils from diff erent sampling depths have specifi c spectral properties. A band at 1330 cm −1 is characteristic of shallow depths. Because of their low organic matter (OM) content, the deeper samples are characterized by mineral bands such as quartz, clays, and carbonate. Spectroscopic data indicates that the clay fraction and the LF suff ered measurable chemical transformations during the 800-d incubation, but the POM and silt fraction did not. As the LF decomposes, it loses absorbance at 3400, 1223, and 2920 to 2860 cm −1 . Th e band at 1630 cm −1 increased during incubation, suggesting a resistant form of organic C. Th e clay fraction suff ered changes that were opposite to those of the LF, indicat...

show abstract

“…Since the early 1990s, there has been a gradual increase in the range of analyses available to those marching SOC to suspects. GC-MS analysis for adipocere (decomposition lipid) [3] and methane [4]; particle-size analysis; [5]; Fourier transform infra-red spectroscopy (FTIR [6]); scanning electron microscopy (SEM [7]) and palynology [8] have all been used with varying success. X-ray powder diffraction remains the best available technique for the identification of minerals in fine-grained materials such as soils, rock dust, building debris and rocks [9].…”

Section: Introductionmentioning

confidence: 99%

Conjunctive use of quantitative and qualitative X-ray diffraction analysis of soils and rocks for forensic analysis

Ruffell

Wiltshire

2004

Forensic Science International

View full text Add to dashboard Cite

The forensic analysis of soil organic by FTIR

Cited by 96 publications

References 2 publications

Recent applications of vibrational mid-Infrared (IR) spectroscopy for studying soil components: a review

Recent applications of vibrational mid-Infrared (IR) spectroscopy for studying soil components: a review

Chemical Differences in Soil Organic Matter Fractions Determined by Diffuse‐Reflectance Mid‐Infrared Spectroscopy

Conjunctive use of quantitative and qualitative X-ray diffraction analysis of soils and rocks for forensic analysis

Contact Info

Product

Resources

About