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Analysis Of Gunshot Primer Residue Collection Swabs Using Flameless Atomic Absorption Spectrophotometry
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Book Synopsis Analysis of Gunshot Primer Residue Collection Swabs Using Flameless Atomic Absorption Spectrophotometry by : RD. Koons
Download or read book Analysis of Gunshot Primer Residue Collection Swabs Using Flameless Atomic Absorption Spectrophotometry written by RD. Koons and published by . This book was released on 1987 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods of extraction of gunshot residue (GSR) swabs for determination of antimony (Sb), barium (Ba), and lead (Pb) by flameless atomic absorption spectrophotometry (AAS) have been studied. Optimum extraction parameters were determined using recovery studies of Sb, Ba, and Pb added to swabs at amounts representative of actual GSR and handblank levels. Two difficulties with most extraction-AAS procedures are incomplete extraction of Sb and incorrect Ba results arising from improper matching of sample and standard matrices before AAS determinations. Utilization of standards made by spiking analyte elements on swabs and extraction along with samples by an efficient procedure minimizes errors in Sb, Ba, and Pb determination.
Book Synopsis Analysis of Gunshot Primer Residue Collection Swabs Using Flameless Atomic Absorption Spectrophotometry and Inductively Coupled Plasma-Atomic Emission Spectrometry by : RD. Koons
Download or read book Analysis of Gunshot Primer Residue Collection Swabs Using Flameless Atomic Absorption Spectrophotometry and Inductively Coupled Plasma-Atomic Emission Spectrometry written by RD. Koons and published by . This book was released on 1989 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two modifications to a previously reported extraction procedure for determination of antimony, barium, and lead in gunshot primer residue swab extract solutions have been studied. Removal of cotton tips from swabs by cutting their shafts results in extraction efficiencies for all elements that compare favorably with those obtained by complete removal of the cotton from the swab shaft. Swab-mounted standards can be made and stored in a dry condition for periods of at least four months before use without adverse effects on analytical results. Long-term relative precision estimates for the combined extraction and analysis are approximately 5% for all three elements.
Book Synopsis Current Methods in Forensic Gunshot Residue Analysis by : A. J. Schwoeble
Download or read book Current Methods in Forensic Gunshot Residue Analysis written by A. J. Schwoeble and published by CRC Press. This book was released on 2000-06-27 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the improvements in collection methods and analytical tools that allow more thorough analyses, gunshot residue examination has made a dramatic impact as an area of trace evidence essential to the investigation and prosecution of violent crime. Current Methods in Forensic Gunshot Residue Analysis deals with major areas of gunshot residue analysis, including current and future methods of analysis, collection techniques, interpretation of evidence, expert testimony and report writing. This text is a necessity for forensic scientists conducting this type of analysis and anyone involved in the investigation and prosecution of violent crimes involving firearms.
Book Synopsis The Application of Prefiltration to the Analysis of Acid-Degraded Gunshot Residue Swabs by : RJ. Kopec
Download or read book The Application of Prefiltration to the Analysis of Acid-Degraded Gunshot Residue Swabs written by RJ. Kopec and published by . This book was released on 1979 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collection of gunshot residues (GSR) from a suspect's hands is a routine forensic technique widely utilized by police investigators. Presently the most widely used method for the collection and analysis of GSR samples is by swabbing the hands with dilute nitric-acid-moistened cotton swabs and determining the barium and antimony levels by flameless atomic absorption spectrophotometry (FAAS) These techniques of collection and analysis have acquired wide acceptance because of their low cost, uncomplicated procedures, and overall reliability when compared with alternate methods.
Download or read book Crime Laboratory Digest written by and published by . This book was released on 1986 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microwave Digestion of Gunshot Residue Swabs in Preparation for Atomic Absorption Spectrophotometry Analysis for Forensic Applications by : Donald I. Carman
Download or read book Microwave Digestion of Gunshot Residue Swabs in Preparation for Atomic Absorption Spectrophotometry Analysis for Forensic Applications written by Donald I. Carman and published by . This book was released on 1998 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Gunshot Primer Residue Collection Swabs by Inductively Coupled Plasma-Mass Spectrometry by : RD. Koons
Download or read book Analysis of Gunshot Primer Residue Collection Swabs by Inductively Coupled Plasma-Mass Spectrometry written by RD. Koons and published by . This book was released on 1998 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concentrations of antimony, barium, and lead in gunshot residue collection swab extract solutions were determined using inductively coupled plasma-mass spectrometry. Analytical advantages of inductively coupled plasma-mass spectrometry are a lack of interferences by swab extract constituents, low detection limits, wide linear dynamic ranges, short analysis times, and good precision and accuracy. This procedure is applicable to both hand blank and shooter-associated levels of antimony, barium, and lead in gunshot residue swab extracts.
Book Synopsis The Application of Oxygen Plasma Ashing to Gunshot Residue Analysis by : WD. Kinard
Download or read book The Application of Oxygen Plasma Ashing to Gunshot Residue Analysis written by WD. Kinard and published by . This book was released on 1978 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the analysis of hand samples for barium and antimony levels indicative of gunshot residue, severe problems are encountered with swabs contaminated by blood, dirt, or grease. These problems originate from two main sources: decreased effectiveness of sample leaching and high instrumental backgrounds. When the flameless atomic absorption spectroscopy (FAAS) method developed in our laboratory [1] is used, the choice of sample collection materials is restricted to those that can be easily separated from the elements of interest. In our approach, a sample such as a cotton swab is leached with dilute nitric acid to extract any residues present. Surface contamination may make the swab impervious to solvent penetration and, therefore, inefficient leaching occurs. Contaminants such as blood, dirt, or grease on the sample can coat any primer residue particles present and prevent their dissolution in the acid, resulting in the amount of the elements of interest being lower in the solution than expected. The measured level of these elements will thus be lower than that actually present in the sample. Increasing the contact time between solvent and sample, or rigorous agitation to improve solvent attack, usually results in enhancement of the background response during the atomization phase of the AA analysis with no improvement in analytical results. This enhanced background, especially notable at the 217.6- and 217.9-nm (2176- and 2179-Å) lines used for antimony detection, may be attributed to light scattering by organic materials not completely destroyed during the drying and ashing cycle of the AA determination. Destruction of the matrix by ashing of the samples prior to analysis significantly decreases the analytical background and eliminates leaching difficulties.
Book Synopsis Gunshot Residue Analysis Via Organic Stabilizers and Nitrocellulose by : Lana Leggett
Download or read book Gunshot Residue Analysis Via Organic Stabilizers and Nitrocellulose written by Lana Leggett and published by . This book was released on 1988 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Review of written by WF. Rowe and published by . This book was released on 2001 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the methods currently used for the analysis of gunshot residue, with particular emphasis on variable pressure SEM/EDS analysis of primer residues. The chapters consider in turn: (1) gunshot residue as forensic evidence (including the loss or transfer of gunshot residue and its collection at the scene of the crime), (2) the formation and composition of primer residue particles, (3) methods of gunshot residue analysis (concentrating on the aforementioned variable pressure SEM/EDS but also outlining graphite furnace atomic absorption spectrophotometry, neutron activation analysis, inductively coupled plasma-mass spectrometry and capillary electrophoresis), (4) gunshot residue plumes produced by a variety of firearms (presenting video captures from the highspeed video studies conducted by RJ Group, Inc., in 1994), (5) the results of SEM/EDS analyses of a number of samples of gunsot residue produced by various handguns firing a variety of brands of ammunition, and finally (6) the proper documentation of test results and the presentation of testimony. The book concludes with a glossary of ballistic terms and a comprehensive bibliography of articles relating to the analysis of gunshot residue.
Book Synopsis Gunshot Residue Analysis--A Review by : H-h Meng
Download or read book Gunshot Residue Analysis--A Review written by H-h Meng and published by . This book was released on 1997 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of all aspects of analysis associated with gunshot residues is provided. This includes a summary of what both inorganic and organic residues are, how they arise and how they may be collected from a variety of substrates. Ways of processing samples to the point of analysis and the means by which they may be analyzed using a variety of techniques is discussed. The techniques described include SEM/EDX, flameless atomic absorption spectroscopy, neutron activation analysis, energy dispersive X-ray fluorescence and some other less common methods for inorganic residues and gas, high performance liquid and super critical fluid chromatography with speciality detectors including mass spectrometry together with capillary electrophoresis, for organic residues. A summary of how the results of such analyses may be interpreted is discussed under the different analytical techniques.
Download or read book Journal of Forensic Sciences written by and published by . This book was released on 1990 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gunshot Residue Analysis Via Organic Stabilizers and Metallic Constituents and Differentiation of Black and Smokeless Powders by : Darwin Bradley Dahl
Download or read book Gunshot Residue Analysis Via Organic Stabilizers and Metallic Constituents and Differentiation of Black and Smokeless Powders written by Darwin Bradley Dahl and published by . This book was released on 1987 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chemical Analysis of Firearms, Ammunition, and Gunshot Residue by : James Smyth Wallace
Download or read book Chemical Analysis of Firearms, Ammunition, and Gunshot Residue written by James Smyth Wallace and published by CRC Press. This book was released on 2018-06-04 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical Analysis of Firearms, Ammunition, and Gunshot Residue, Second Edition continues in the tradition of the popular first edition, filling the void in forensic texts on the subject. While most books on firearms focus solely on the physical aspects of firearms, this book addresses forensic issues relating to the chemical aspects of firearms and ammunition. It draws on the latest published literature including books, scientific papers, technical reports, manufacturer’s literature, newspaper articles, and personal observations and research conducted by the author. This edition is fully updated, introducing the history and development of firearms and ammunition including advances in the chemical analysis of them. Several changes in primer compositions and the particle classification system are addressed with new techniques added on evidence collection and testing methods. Coverage details chemical aspects of forensic firearms casework with particular emphasis on the detection of gunshot residues (GSR), firearm discharge residues (FDR), and cartridge discharge residues (CDR) on a suspect’s skin and clothing surfaces. Two new chapters have been added. One deals with unusual firearms case while the other summarizes a controversial, high-profile Australian case involving inorganic and organic gunshot residue, highlighting the dangers of incorrect forensic evidence and the increased need for careful training of forensic scientists. Fully updated to reflect the latest techniques and tests for particle and chemical classification Provides a complete history of firearms and ammunition development as well as advances in the chemical analysis involved in forensic firearm casework Features a one-of-a-kind chapter on processing suspects, a crucial component in many firearms and explosives residue cases The book will serves as a useful to forensic chemists, investigators, ballistics experts, among other professionals serving in a variety of forensic disciplines.
Download or read book Criminalistics written by James E. Girard and published by Jones & Bartlett Learning. This book was released on 2017-08-15 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: Criminalistics is designed for criminal justice students with little to no background in biology or chemistry. The essentials to forensic science are all there, including fingerprint identification, DNA, ballistics, detection of forgeries, forensic toxicology, computer forensics, and the identification and analysis of illicit drugs.
Book Synopsis Analysis of Long-Range Bullet Entrance Holes Atomic Absorption Spectrophotometry and Scanning Electron Microscopy by : M. Ravreby
Download or read book Analysis of Long-Range Bullet Entrance Holes Atomic Absorption Spectrophotometry and Scanning Electron Microscopy written by M. Ravreby and published by . This book was released on 1982 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bullet residue and primer particles were analyzed by scanning electron microscopy with energy dispersive analysis (SEM-EDA) and by flame and flameless atomic absorption spectrophotometry (AAS) The residue and particles were on cloth targets around entrance holes produced by bullets fired at distances of 10 to 200 m. Primer particles and their chemical constituents were almost always detected by SEM-EDA around the holes produced by rifles and pistols fired at long ranges, and in many cases the barium and antimony associated with primer particles were detected by flameless AAS. Particles were also detected by SEM-EDA on the rear of bullets fired into and recovered from wooden blocks. Usually a hole caused by a bullet jacketed with gilding metal could be distinguished from one caused by a bullet jacketed with yellow brass alloy. Paint from bullet tips of military tracers was also detected. Analysis of the various residues around entrance holes provides a means for identifying the type of ammunition used.
Book Synopsis Criminalistics: Forensic Science, Crime and Terrorism by : James E. Girard
Download or read book Criminalistics: Forensic Science, Crime and Terrorism written by James E. Girard and published by Jones & Bartlett Publishers. This book was released on 2011-01-28 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: Criminalistics: Forensic Science, Crime and Terrorism, Second Edition introduces readers with no background in biology or chemistry, to the study of forensic science, crime analysis and application. Principle topics such as fingerprint identification, DNA, paint and glass analysis, drug toxicology, and forensic soil characterization are thoroughly explained in a reader-friendly manner. Unlike other texts available on this topic, this Second Edition is updated to include comprehensive coverage on important homeland security issues including explosives, weapons of mass destruction, and cybercrime. Key Features: * New case studies and updated sections on analysis of fingerprints and questioned documents offer recent developments and findings in this critical field. * Two new chapters on chemistry and biology equip readers with the foundation and tools necessary to understand more advanced topics. * Extensive updating of Chapter 11 “Drug Use and Abuse,” provides the latest methods of drug testing and analysis by federal and state law enforcement agencies. Instructor Resources: * Answers to end of chapter questions * Lecture Outlines * Test Bank * PowerPoint Lecture Outlines Student Resources: * Companion Website (secure) featuring: - web links - interactive glossary - interactive flashcards - chapter spotlights - crossword puzzles *Access to the student companion website can be purchased here http://www.jblearning.com/catalog/9780763789947/. Bundles: * Criminalistics with Brown Lab Manual * Criminalistics with Companion Website * Criminalistsics with with Brown Lab Manual and Companion Website * Criminalistics with Current Topics in Ethics eChapters
