This paper describes a repeatability test, comparing conventional X-ray diffraction (XRD) analyses with the technique of quantitative X-ray diffraction (QXRD) as a determinant of mineral abundance. The conjunctive use of both methods allows specific mineral abundances to be matched between scene of crime (SOC) and suspects where soil or substrate mineralogy is similar. In our test, samples from potential SOC locations were taken from car tyre tracks. A car was driven to one location by an independent person and the car submitted for sampling. The tyre-tread sample showed potential correlation to two locations: one correct and the other incorrect. QXRD showed the mineral proportions of the tyre-tread sample matched only the correct location. However, QXRD did fail to discriminate two locations that XRD did show to be different. Both methods utilise the same sample and X-ray diffractogram, suggesting that their conjunctive use, preceded by standard Earth material forensic study, is recommended.
Conjunctive use of quantitative and qualitative X-ray diffraction analysis of soils and rocks for forensic analysis.
Published 2004 in Forensic Science International
ABSTRACT
PUBLICATION RECORD
- Publication year
2004
- Venue
Forensic Science International
- Publication date
2004-10-04
- Fields of study
Geology, Medicine, Chemistry, Environmental Science
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
CITATION MAP
EXTRACTION MAP
CLAIMS
CONCEPTS
- conjunctive use
The combined application of conventional and quantitative X-ray diffraction to the same forensic sample.
Aliases: combined use
- conventional x-ray diffraction
A qualitative X-ray diffraction approach used here to compare mineralogical patterns between samples.
Aliases: XRD, X-ray diffraction
- mineral abundance
The relative amount of each mineral present in a sample as assessed by diffraction analysis.
Aliases: mineral proportions
- quantitative x-ray diffraction
A quantitative X-ray diffraction approach used here to estimate the proportions of minerals in a sample.
Aliases: QXRD
- same sample and x-ray diffractogram
The shared specimen and diffraction pattern used as the basis for both analytical methods.
Aliases: same sample, same diffractogram
- scene-of-crime location
A location associated with the crime scene from which comparison soil or substrate samples were taken.
Aliases: SOC, scene of crime
- soil and substrate mineralogy
The mineral composition of soil or other substrate material considered in the forensic comparison.
Aliases: soil mineralogy, substrate mineralogy
- standard earth material forensic study
The baseline forensic examination of Earth materials that is performed before applying diffraction-based comparisons.
Aliases: Earth material forensic study
- tyre-tread sample
A sample collected from the tread of a car tyre for comparison with location samples.
Aliases: tyre tread sample, tyre-track sample
REFERENCES
Showing 1-16 of 16 references · Page 1 of 1
CITED BY
Showing 1-72 of 72 citing papers · Page 1 of 1