Forensic Science

Brettell, Thomas A.; Butler, John M.; Almirall, José R.

doi:10.1021/ac9008786

Cited by 26 publications

(18 citation statements)

References 520 publications

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“…However, the above‐mentioned elements may be easily found in the environment from other sources not related to the firearms discharge. This is especially troublesome when the use of atomic spectroscopy techniques, where the sample material undergoes a complete dissolution prior to the determination of the elements of interest, loses morphological information and individual particle identification (6,22–27). In the last years, emphasis has been placed on the use of scanning electron microscopy equipped with an energy‐dispersive X‐ray technique (SEM/EDS) for GSR analysis (11,28).…”

mentioning

confidence: 99%

Identification of Gunshot Residues in Fabric Targets Using Sector Field Inductively Coupled Plasma Mass Spectrometry Technique and Ternary Graphs*

Freitas

Sarkis

Neto³

et al. 2011

Journal of Forensic Sciences

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During criminal investigations involving firearms, the detection of gunshot residues (GSRs) is one of the most important evidences. In the present study, a new method to identify trace evidences of GSRs, deposited around the bullet entrance hole, in different types of fabrics used as targets, is described. The experiments were carried out using a 0.38-inch caliber revolver, and 9-mm and 0.40-inch caliber pistols. Testimonies of 2.25 cm(2) of the fabrics were cut around the bullet entrance and digested with 10% nitric acid. Antimony, barium, and lead were analyzed in the remaining solution using a sector field inductively coupled plasma mass spectrometer. The concentrations of the elements were detected at levels up to few microgram per square centimeter. The use of ternary graphics allowed us to identify specific patterns of distribution for blank samples and the clear distinction between the revolver and pistols used.

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confidence: 99%

Identification of Gunshot Residues in Fabric Targets Using Sector Field Inductively Coupled Plasma Mass Spectrometry Technique and Ternary Graphs*

Freitas

Sarkis

Neto³

et al. 2011

Journal of Forensic Sciences

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“…This technique itself is not in the category of DNA quantification, but its reliability is strongly dependent upon the quantity as well as the quality of the obtained DNA samples. Therefore, accurate determination of the quantity of DNA in the sample specimen is an important prerequisite to enable its powerful utility in courts (Brettell et al, 2009). Among various biological substances, nucleic acids come first as the target materials for establishment of metrology for biology.…”

Section: Metrology In Quantification Of Nucleic Acids 21 Backgroundsmentioning

confidence: 99%

Modern Metrology Concerns

Cocco¹

2012

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is a professional engineer in the field of racing and luxury automobiles who has worked in Research & Design Department of Ferrari F1 team and in Maserati Product Development as electronic integration project chief. Currently he is responsible for electronic parts in Supply Quality of Automobili Lamborghini S.p.A. He earned a master degree in Telecommunication Engineering and a Ph.D. in Information Engineering. He specialized in electronic measurement and digital signal processing and has published several papers for international conferences and journals. ContentsPreface XI Section Introduction 1

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“…Благодаря высокой чувствительности, умеренной стоимости аппаратурного оформления и простоты выполнения анализа, современная люминесценция занимает лидирующее место в медицинской диагностике, биологических исследованиях, судебно-медицинской экспертизе [4][5][6][7]. Предлагаются актуальные подходы к созданию аналитических систем, позволяющих дополнительно улучшить метрологические характеристики люминесцентного определения, увеличить интенсивность аналитического сигнала и повысить его избирательность [8].…”

Section: Introductionunclassified

Fluorescent Properties of Doxycycline in Presence of Silver Nanoclusters

Smirnova¹,

Zhelobitskaya²,

Danilina³

et al. 2020

IVKKT

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The paper shows that in the presence of silver nanoparticles the efficiency of intramolecular energy transfer in the complex of europium with doxycycline increases. It is proved that sensitivity of determination increases and limit of detection of doxycycline decreases by the method of sensitized fluorescence. The justification of the observed effects is given. The amplification of the signal of sensitized fluorescence in the presence of silver nanoparticles (energy donor) is the result of resonant transfer of excitation energy between the nanoparticle and the antibiotic ion, which is implemented under conditions of overlapping of the local surface plasmon resonance spectrum and excitation of the doxycycline ligand located near the surface of the nanoparticle. As a result of exposure to the antibiotic external radiation source and the local field of the surface plasmon increases the efficiency of tetracycline excitation, which contributes to the effectiveness of intramolecular energy transfer in europium chelate with doxycycline, doubling the intensity and lifetime. Modification of the surface of silver nanoparticles by europium ions allows to reduce the distance between the surface of a nanoparticle and an antibiotic, to increase the intensity of the signal of sensitized fluorescence by more than 100 times. The role of the stabilizer of a non-chromophore-containing ligand, − citrateion, in the formation of the analytical signal lies in its participation in the formation of a multi-ligand Eu3+ complex on the surface of a nanoobject, which reduces the distance between the donor and the acceptor, as well as the additional removal of water molecules from the immediate environment of the complexing agent ion, suppressing the process of excitation energy dissipation. On the basis of the conducted researches the fluorimetric technique of definition of doxycycline in medicines is offered. It differs in a low limit of detection (6.0·10-9 M) and a wide range of the defined concentrations from 1.0·10-8 to 1.0·10-5 M.

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Forensic Science

Abstract: This applications review aims to present a concise survey of articles appearing in publications that primarily appeal to forensic practitioners. With this objective, we have focused our attention on the following journals:

Cited by 26 publications

References 520 publications

Identification of Gunshot Residues in Fabric Targets Using Sector Field Inductively Coupled Plasma Mass Spectrometry Technique and Ternary Graphs*

Identification of Gunshot Residues in Fabric Targets Using Sector Field Inductively Coupled Plasma Mass Spectrometry Technique and Ternary Graphs*

Modern Metrology Concerns

Fluorescent Properties of Doxycycline in Presence of Silver Nanoclusters

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