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hair analysis of Mammals of Brazilian Wildlife for Forensic Purposes

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Open Journal of Animal Sciences 2018年第3期8卷 335-345页

作者： Talia Missen Tremori Fernanda Marion Monteiro Garcia Luis Mauricio Montoya Florez Bianca Picado Goncalves Barbara Wagner Duarte Ferraz de Camargo Claire Gwinnett Carlos Roberto Teixeira Noeme Sousa Rocha Department of Veterinary Clinics School of Veterinary Medicine and Animal ScienceSao Paulo State UniversityBotucatuBrazil Department of Genetics Sao Paulo State UniversityBotucatuBrazil Faculty of Computing Engineering and SciencesUniversity of StaffordshireStaffordshireUK Department of Surgery and Anesthesiology School of Veterinary Medicine and Animal ScienceSao Paulo State UniversityBotucatuBrazil

Wildlife trafficking is classified as the fourth largest illegal commerce in the world. Taxonomic identification of wildlife is an ordinary process for forensics experts. The aim of this study was to analyze animal’s hair from Brazilian’s wildlife through microscopic and compare morphology of bristle among species analyzed. hair samples of nine species were analyzed. Glass slides were analyzed through optical microscopy and following measurements were obtained: total length, medulla diameter, overall diameter and overall ratio diameter of the medulla’s diameter. The images obtained at identification of animals through the morphology of hair and the statistics analysis corroborates in favor for the validation of the technique.

关键词： Forensic Zoobiology hair analysis Veterinary Forensic Medicine Animal Expertise Animal Trafficking Smuggling

Determination of amphetamines,ketamine and their metabolites in hair with high-speed grinding and solid-phase microextraction followed by LC-MS

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Forensic Sciences Research 2021年第4期6卷 273-280页

作者： Liang Meng Yong Dai Chen Chen Jun Zhang Department of Forensic Science Fujian Police CollgeFuzhouChina Engineering Research Center Fujian Police CollegeFuzhouChina Department of Forensic Science Sichuan Police CollegeLuzhouChina Drug Research Center of Integrated Traditional Chinese and Western Medicine Affliated Traditional Chinese Medicine Hospital of Southwest Medical UniversityLuzhouChina

A novel hair sample pre-treatment method based on high-speed grinding and solid-phase microextraction(SPME)had been applied for the determination of amphetamines,ketamine and their metabolites in hair samples by liquid chromatography mass spectrometry(LC-MS).A 20mg sample of hair was ground with 2 mL of saturated sodium carbonate solution using a high-efficiency hair grinder with 70 Hz osillation for 2min at 4℃.After centrifuging,1.5mL of the supernatant was transferred and treated with SPME by direct immersion(DI-SPME).The target analytes extracted by fibre were desorbed and analysed using *** the optimum conditions,a recovery of 90.2%-95.8%was obtained for all *** analytical method was linear for all analytes in the range from 0.2 to 10 ng/mg with the correlation coefficient ranging from 0.9985 to *** detection limits for all analytes were estimated to be 0.067 ng/*** accuracy(mean relative error)was within±6.9%and the precision(relative standard error)was less than 6.8%.The combination of high-speed grinding of hair and SPME had the advantages of being easy to perform,environment-friendly and high in detection *** proposed method offered an altermative ana lytical approach for the sensitive detection of drugs in hair samples for forensic purposes.

关键词： Forensic sciences forensic toxicology drugs of abuse high-speed grinding hair analysis liquid chromatography-mass spectrometry solid-phase microextraction

Wildlife forensic examination in Russia:the practice and perspectives

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Forensic Sciences Research 2016年第1期1卷 38-41页

作者： Svetlana A.Smirnova Georgy G.Omelyanyuk Victoriya V.Gulevskaya Shamil N.Khaziev The Russian Federal Centre of Forensic Science of the Ministry of Justice of the Russian Federation MoscowRussia Peoples’Friendship University of Russia(RUDN University) MoscowRussia Institute of State and Law Russian Academy of SciencesMoscowRussia

Two case studies are described which show application of forensic expertise to establish important circumstances related to the investigation of the crimes against wildlife flora and *** study of the animal hair is a method for investigation of the crimes against wildlife objects which is used more frequently during the recent *** perspectives of development of the new branch of forensic research in Russia are formulated,and the proposals and recommendations for developing the Eurasian wildlife flora and fauna network are formulated in this article.

关键词： Forensic science hair analysis animal fur wildlife forensic Eurasian wildlife forensic networks

Uncertainty Estimation for the Determination of Trace Heavy Metals in Human hair by Flame and Electrothermal Atomic Absorption Spectrometry

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Journal of Chemistry and Chemical Engineering 2010年第8期4卷 26-34页

作者： Fariba Tadayon Mohammad Saber-Tehrani Azam Ghorbani Department of Chemistry North Tehran Branch Islamic Azad University Tehran Iran

Trace element analysis on hair samples has been widely used to assess wildlife and human exposure to different contaminants present in the environment or at the workplace. Pollutants due to the presence of toxic metals in environment not only enter the body by breading, water, and foodstuff accumulates in hair, but they could be adsorbed directly on the hair from environment. In order to remove adsorbed elements and thus determine the internally bound elements correctly, hair sample must be washed. In the present work, we propose uncertainty estimation for the analytical results that are obtained from determination of cadmium, lead, copper, iron, manganese and nickel in human hair by flame and electrothermal atomic absorption spectrometry （FAAS and ETAAS）. To estimate the uncertainty of analytical result obtained, two types of bias are calculated in the assessment of trueness： a proportional bias and a constant bias. Nested design was applied for calculating proportional bias and Youden method to calculate the constant bias. The results we obtained for proportional bias are calculated from spiked samples. In this case, the concentration found is plotted against the concentration added and the slop of standard addition curve is an estimate of the method recovery. Estimated method of average recovery in human hair is：（1.019 ±0.026）, （0.918 ±0.014）, （1.073±0.016）, （1.0597± 0.017）, （1.073± 0.020） and （0.934± 0.117） for Cd, Pb, Mn, Ni, Fe and Cu respectively.

关键词： Uncertainty hair analysis trace elements atomic absorption spectrometry.