NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Thomas P. Forbes, Liz Robinson, Edward Sisco, Abigail Koss
Thermal desorption (TD) of wipe-based samples was coupled with an in-line dielectric barrier discharge ionization (DBDI) source and rugged compact time-of-flight mass spectrometer (MS) for the detection of explosives, propellants, and post-blast debris
This study investigates a soot deposition measurement technique that relies on the photoacoustic effect of soot. A non-invasive and reliable soot deposition measurement tool would be helpful for fire investigators to quantify burn patterns in a fire scene
Analysis of ignitable liquids in fire debris samples can be a time-consuming process, from extraction of volatile compounds to instrumental analysis. Rapid gas chromatography-mass spectrometry (GC-MS) is a screening technique that can be utilized prior to
The realm of analytical chemistry continues to struggle with defining and evaluating the limit of detection in analytical methods in the sense that a multitude of definitions, criteria, caveats, and...
Jennifer Berry, Mary Gregg, Amanda Koepke, Reta Newman, Kavita Jeerage
Dynamic vapor microextraction (DVME) is a potential method for the extraction and concentration of ignitable liquid (IL) residue in fire debris. This low flow rate, purge-and-trap headspace concentration method collects IL vapors onto a chilled adsorbent
Donna J. Sirk, Andria Mehltretter, Meghan Prusinowski, Hal Arkes, David Flohr, Cedric Neumann, Scott Ryland, Tatiana Trejos
This interlaboratory study evaluated a guide for interpreting and reporting trace evidence examinations. The online survey aimed to assess the examiners' interpretation of casework scenarios designed by a subject matter expert panel (SMEP), specifically
Reductions in instrument size, weight, and power continue to facilitate the development and application of field-deployable devices for investigative purposes. Portable analytical instrumentation supporting the rapid and reliable identification of two
Techniques developed for the screening of forensic samples can be useful for increasing sample throughput and decreasing backlog in forensic laboratories. One such technique, rapid gas chromatography mass spectrometry (GC-MS), allows for fast sample
Anuradha Akmeemana, Ruthmara Corzo, Jodi Webb, Emily Haase, Jose Almirall
The use of standardized and robust analytical methods for the quantitative analysis of the elemental composition of glass fragments enables the characterization and comparison of glass as forensic evidence. This paper in- troduces a new R-based Shiny
Katelyn Lambert, Shirly Montero, Anuradha Akmeemana, Ruthmara Corzo, Gwyneth Gordon, Emily Haase, Ping Jiang, Oriana Ovide, Katrin Prasch, Kahlee Redman, Thomas Scholz, Tatiana Trejos, Jodi Webb, Peter Weis, Wim Wiardia, Sharon Wilczek, Huifang Xie, Peter Zoon, Jose Almirall
The results of an interlaboratory exercise involving ten (10) operational and research laboratories employing laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) and using a standard test method (ASTM E2927-16e1) for the forensic
Haiying Guan, Yooyoung Lee, Lukas Diduch, Jesse Zhang, Ilia Ghorbanian Bajgiran, Timothee Kheyrkhah, Peter Fontana, Jonathan G. Fiscus
This document describes the online leaderboard public evaluation program, Open Media Forensics Challenge (OpenMFC) 2021-2022. In the report, first, the introduction, objectives, challenges, contributions, and achievements of the evaluation program are
Thomas P. Forbes, Jeffrey Lawrence, Changtong Hao, J Greg Gillen
Rapid screening for chemical traces of explosives and narcotics is widely used to support homeland security and law enforcement. These target compounds span a range of physicochemical properties from organic to inorganic, with preferential ionization
The need for rapid chemical analyses and new analytical tools in forensic laboratories continues to grow due to case backlogs, difficult to analyze cases, and identification of previously unseen materials such as new psychoactive substances. To adapt to
Jose Almirall, Anuradha Akmeemana, Katelyn Lambert, Ping Jiang, Ela Bakowska, Ruthmara Corzo, Claudia Martinez Lopez, Edward C. Pollock, Katrin Prasch, Tatiana Trejos, Peter Weis, Wim Wiarda, Huifang Xie, Peter Zoon
Security and forensic applications employ test and reference materials to develop, calibrate, and validate analytical instrumentation such as mass spectrometry for the trace detection and chemical analysis of target analytes. An emerging class of target
Ruthmara Corzo, Tricia Hoffman, Troy Ernst, Tatiana Trejos, Ted Berman, Sally Coulson, Peter Weis, Aleksandra Stryjnik, Hendrick Dorn, Edward Chip Pollock, Michael Scott Workman, Patrick Jones, Brendan Nytes, Thomas Scholz, Huifang Xie, Katherine Igowsky, Randall Nelson, Kris Gates, Jhanis Gonzalez, Lisa-Mareen Voss, Jose Almirall
Seventeen laboratories participated in three interlaboratory exercises to assess the performance of refractive index, micro X-ray Fluorescence Spectroscopy (µXRF), and Laser Induced Breakdown Spectroscopy (LIBS) data for the forensic comparison of glass
The analysis of complex samples without extensive preparation steps (e.g., filtration or centrifugation) is a persistent challenge for applications ranging from forensic identification to high-throughput security screening. Here, a capillary-based
The chemical analysis of homemade explosives (HMEs) and improvised explosive devices (IEDs) remains challenging for fieldable analytical instrumentation and sensors. Complex explosive fuel-oxidizer mixtures, black and smokeless powders, flash powders, and
Micro x-ray fluorescence spectroscopy (u-XRF) is a standard technique used for the elemental analysis of glass fragments in forensic casework. The glass specimens encountered in casework are usually small ( 1 mm), thin, irregularly-shaped fragments that
Nicholas Ritchie, J Matney Wyatt, Doug DeGaetano, Ludwig Niewoehner, Frank Platek, David Edwards
The reliability of forensic inorganic gunshot residue (iGSR) analysis depends strongly on the performance of the scanning electron microscope with energy dispersive X-ray spectrometer (SEM- EDX) instrument and the software that automates the data
Determination of the ethanol concentration in beverages remains a common request to forensic laboratories. While traditionally completed using headspace gas chromatography (HS-GC), this process involves lengthy run times and the need for specialized
Thomas Forbes, Jeffrey Lawrence, Jennifer R. Verkouteren, R. Michael Verkouteren
The opioid crisis and emergence of fentanyl, fentanyl analogues, and other synthetic opioids has highlighted the need for sensitive and robust detection for interdiction at screening points, notably vehicles at border crossings and packages at postal