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دسته بندی:
حقوق خصوصی - Private law
سال انتشار:
2020
عنوان انگلیسی مقاله:
The Forensic Discrimination of Quartz Sands from the Swan Coastal Plain, Western Australia
ترجمه فارسی عنوان مقاله:
تبعیض قانونی ماسه های کوارتز از دشت ساحلی قو ، استرالیای غربی
منبع:
Sciencedirect - Elsevier - Forensic Science International: Reports, Journal Pre-proof, 100130. doi:10.1016/j.fsir.2020.100130
نویسنده:
Kari M. Pitts (Methodology) (Investigation) (Data curation) (Writing - original draft)
چکیده انگلیسی:
Soil is a valuable resource in many criminal cases. Used to link crime scenes, suspects,
vehicles and tools, it has undergone a resurgence in recent years with multiple groups
focusing on methods to allow for better differentiation. Many times the methods are focused
on soil fractions, such as the clay or organic fractions. However, very sandy soils, such as
the quartz sands of the Swan Coastal Plain, present a challenge to these methods. Clays
and organic materials are very limited in these soils and hence, another characteristic needs
to be added to the examination process. The authors here present a potential technique
useful for the differentiation of soils where the soil texture is dominated by quartz sand. The
quartz sand grains are used as a sampling medium, where the fine coatings (particles <20
μm in size) are recovered and analysed using X-ray diffraction (XRD). The peak intensities
for a total of 7 commonly occurring minerals, converted to relative percentages, were used to
compare 52 sub-surface soils from known locations, and a further 339 soils from various
stratigraphies, based on an algorithm for examining similarity. Results indicate this technique
allows a degree of discrimination sufficient for inclusion in a standard soil comparison
protocol, specifically for cases where the traditional fractionated analyses are not
appropriate.
Keywords : (max 6) soil analysis | X-ray diffraction | grain coating
قیمت: رایگان
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