Lorne Elias | |
---|---|
Nationality | Canadian |
Alma mater |
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Known for | Explosives detection |
Scientific career | |
Fields | |
Institutions | National Research Council Canada |
Thesis | A general direct-current method for the measurement of electrolytic conductance, and its application to nitromethane solutions of quaternary ammonium halides (1956) |
Doctoral advisor | H. Schiff |
Lorne Elias is a Canadian chemist, inventor, and a pioneer in explosives detection technology. He invented the explosives vapour detector, EVD-1, a portable bomb detection instrument deployed at international airports in Canada in the 1980s. He contributed to the field of explosives detection for over three decades, and is called the father of vapour and trace explosives detection technology.
Lorne Elias obtained a Bachelor of Science in chemistry from Carleton University in 1952. [1] He received a PhD in physical chemistry under the direction of H. Schiff from McGill University in 1956. [2]
Elias conducted research on trace organic analyses at National Research Council Canada, from pesticides to narcotics and explosives. [3] [4] [5] He invented the portable suitcase-sized explosives vapour detector, EVD-1, [6] [7] and the Trace Narcotics Detector. [8] EVD-1 was based on gas chromatography with electron capture detector, [9] and the Trace Narcotics Detector was based on gas chromatography with nitrogen-phosphorus detector. [8] EVD-1 was the first portable bomb detection instrument in Canada, [10] one of the 100 notable innovations from National Research Council Canada, [11] and one of 50 Greatest Canadian Inventions. [12] [13] EVD-1 was capable of detecting minute amounts of dynamite, other explosives, and 2,3-Dimethyl-2,3-dinitrobutane (DMNB, a taggant or marker in plastic explosives). [10] EVD-1 was deployed during the papal visit in 1984 and alarmed on a luggage of Pope John Paul II, due to a revolver in the luggage packed by bodyguards. [14] Similarly, the EVD-1 detected signatures of black powder from the revolver of a security guard during President Reagan's visit to Canada. [15] The EVD-1 technology was transferred from National Research Council Canada to industry, and units of EVD-1 were deployed at international airports in Canada after the 1985 Air India bombing. [5] [16] Elias, a pioneer who shaped the development of explosives detection technology deployed today, [17] is called the father of vapour and trace explosives detection technology. [18]
Elias was part of the International Civil Aviation Organization Ad Hoc Group of Specialists on the Detection of Explosives. [19] He contributed in the development and evaluation of the ICAO detection markers for plastic explosives, which led to the Convention on the Marking of Plastic Explosives for the Purpose of Detection. [19] He studied the permeability of detection markers (DMNB, ethylene glycol dinitrate EGDN, ortho-mononitrotoluene o-MNT and para-mononitrotoluene p-MNT) through various materials [20] and their vapour pressures, [21] and conducted research in encapsulating DMNB in order to extend the shelf life. [22] [23]
He retired from National Research Council Canada after 35 years, [10] and continued with explosives detection research as a private consultant (JenEl TVD Research and Consulting Inc) [24] for a number of government departments, including the U.S. Federal Aviation Administration, Transport Canada, and the Canadian Explosives Research Laboratory of Natural Resources Canada. [10]
Journal Articles
Book Chapters
Conference Proceedings
High-performance liquid chromatography (HPLC), formerly referred to as high-pressure liquid chromatography, is a technique in analytical chemistry used to separate, identify, and quantify each component in a mixture. It relies on pumps to pass a pressurized liquid solvent containing the sample mixture through a column filled with a solid adsorbent material. Each component in the sample interacts slightly differently with the adsorbent material, causing different flow rates for the different components and leading to the separation of the components as they flow out of the column.
Gas chromatography (GC) is a common type of chromatography used in analytical chemistry for separating and analyzing compounds that can be vaporized without decomposition. Typical uses of GC include testing the purity of a particular substance, or separating the different components of a mixture. In preparative chromatography, GC can be used to prepare pure compounds from a mixture.
Gas chromatography–mass spectrometry (GC–MS) is an analytical method that combines the features of gas-chromatography and mass spectrometry to identify different substances within a test sample. Applications of GC–MS include drug detection, fire investigation, environmental analysis, explosives investigation, food and flavor analysis, and identification of unknown samples, including that of material samples obtained from planet Mars during probe missions as early as the 1970s. GC–MS can also be used in airport security to detect substances in luggage or on human beings. Additionally, it can identify trace elements in materials that were previously thought to have disintegrated beyond identification. Like liquid chromatography–mass spectrometry, it allows analysis and detection even of tiny amounts of a substance.
Ultra-high vacuum (UHV) is the vacuum regime characterised by pressures lower than about 1×10−6 pascals. UHV conditions are created by pumping the gas out of a UHV chamber. At these low pressures the mean free path of a gas molecule is greater than approximately 40 km, so the gas is in free molecular flow, and gas molecules will collide with the chamber walls many times before colliding with each other. Almost all molecular interactions therefore take place on various surfaces in the chamber.
Photoacoustic spectroscopy is the measurement of the effect of absorbed electromagnetic energy on matter by means of acoustic detection. The discovery of the photoacoustic effect dates to 1880 when Alexander Graham Bell showed that thin discs emitted sound when exposed to a beam of sunlight that was rapidly interrupted with a rotating slotted disk. The absorbed energy from the light causes local heating, generating a thermal expansion which creates a pressure wave or sound. Later Bell showed that materials exposed to the non-visible portions of the solar spectrum can also produce sounds.
Atmospheric pressure chemical ionization (APCI) is an ionization method used in mass spectrometry which utilizes gas-phase ion-molecule reactions at atmospheric pressure (105 Pa), commonly coupled with high-performance liquid chromatography (HPLC). APCI is a soft ionization method similar to chemical ionization where primary ions are produced on a solvent spray. The main usage of APCI is for polar and relatively less polar thermally stable compounds with molecular weight less than 1500 Da. The application of APCI with HPLC has gained a large popularity in trace analysis detection such as steroids, pesticides and also in pharmacology for drug metabolites.
Explosive detection is a non-destructive inspection process to determine whether a container contains explosive material. Explosive detection is commonly used at airports, ports and for border control.
A flame ionization detector (FID) is a scientific instrument that measures analytes in a gas stream. It is frequently used as a detector in gas chromatography. The measurement of ion per unit time make this a mass sensitive instrument. Standalone FIDs can also be used in applications such as landfill gas monitoring, fugitive emissions monitoring and internal combustion engine emissions measurement in stationary or portable instruments.
Explosives trace detectors (ETD) are explosive detection equipment able to detect explosives of small magnitude. The detection is accomplished by sampling non-visible "trace" amounts of particulates. Devices similar to ETDs are also used to detect narcotics. The equipment is used mainly in airports and other vulnerable areas considered susceptible to acts of unlawful interference.
A photoionization detector or PID is a type of gas detector.
Thermospray is a soft ionization source by which a solvent flow of liquid sample passes through a very thin heated column to become a spray of fine liquid droplets. As a form of atmospheric pressure ionization in mass spectrometry these droplets are then ionized via a low-current discharge electrode to create a solvent ion plasma. A repeller then directs these charged particles through the skimmer and acceleration region to introduce the aerosolized sample to a mass spectrometer. It is particularly useful in liquid chromatography-mass spectrometry (LC-MS).
The Fido explosives detector is a battery-powered, handheld sensory device that uses amplifying fluorescent polymer (AFP) materials to detect trace levels of high explosives like trinitrotoluene (TNT). It was developed by Nomadics, a subsidiary of ICX Technologies, in the early 2000s as part of the Defense Advanced Research Projects Agency's (DARPA) Dog's Nose program. The Fido explosives detector is considered the first artificial nose capable of detecting landmines in the real world. The device was named after its ability to detect explosive vapors at concentrations of parts per quadrillion, which is comparable to the sensitivity of a bomb-sniffing dog’s nose, i.e. the historical “gold standard” for finding concealed explosives.
Autonomous Detection Systems (ADS), also called biohazard detection systems or autonomous pathogen detection systems, are designed to monitor air in an environment and to detect the presence of airborne chemicals, toxins, pathogens, or other biological agents capable of causing human illness or death. These systems monitor the air continuously and send real-time alerts to appropriate authorities in the event of an act of bioterrorism or biological warfare.
A gas detector is a device that detects the presence of gases in an area, often as part of a safety system. A gas detector can sound an alarm to operators in the area where the leak is occurring, giving them the opportunity to leave. This type of device is important because there are many gases that can be harmful to organic life, such as humans or animals.
Analytical thermal desorption, known within the analytical chemistry community simply as "thermal desorption" (TD), is a technique that concentrates volatile organic compounds (VOCs) in gas streams prior to injection into a gas chromatograph (GC). It can be used to lower the detection limits of GC methods, and can improve chromatographic performance by reducing peak widths.
Headspace gas chromatography uses headspace gas—from the top or "head" of a sealed container containing a liquid or solid brought to equilibrium—injected directly onto a gas chromatographic column for separation and analysis. In this process, only the most volatile substances make it to the column. The technique is commonly applied to the analysis of polymers, food and beverages, blood alcohol levels, environmental variables, cosmetics, and pharmaceutical ingredients.
A respirator cartridge or canister is a type of filter that removes gases, volatile organic compounds (VOCs), and other vapors from air through adsorption, absorption, or chemisorption. It is one of two basic types of filters used by air-purifying respirators. The other is a mechanical filter, which removes only particulates. Hybrid filters combine the two.
The Charged Aerosol Detector (CAD) is a detector used in conjunction with high-performance liquid chromatography (HPLC) and ultra high-performance liquid chromatography (UHPLC) to measure the amount of chemicals in a sample by creating charged aerosol particles which are detected using an electrometer. It is commonly used for the analysis of compounds that cannot be detected using traditional UV/Vis approaches due to their lack of a chromophore. The CAD can measure all non-volatile and many semi-volatile analytes including, but not limited to, antibiotics, excipients, ions, lipids, natural products, biofuels, sugars and surfactants. The CAD, like other aerosol detectors, falls under the category of destructive general-purpose detectors.
George Samuel Hurst was a health physicist and professor of physics at the University of Kentucky. He was known for patent hoarding and in his later years, was involved in a number of patent disputes through his company, Elographics.
Workplace exposure monitoring is the monitoring of substances in a workplace that are chemical or biological hazards. It is performed in the context of workplace exposure assessment and risk assessment. Exposure monitoring analyzes hazardous substances in the air or on surfaces of a workplace, and is complementary to biomonitoring, which instead analyzes toxicants or their effects within workers.
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