¶ … new detection technologies advanced in the prevention of concealment of explosives. Current security methods in place for detection of explosives

The hunt to develop new and improved instruments to eradicate terrorism is on the increase as terrorists progressively produce increasingly more sophisticated instruments. Some of the high explosives that terrorists use such as RDX, TNT, and C4 propel huge blasts that are not always manageable by modern instruments. Added to that are comparatively new arsenal such as sarin gas that can have a concrete effect on nerve and is not always visible. All of this demands new and increasingly sophisticated counter-measures that can provide prompt and accurate detection and identification of these, and other, lethal chemicals.

Traditional methods used have most famously been dogs that have sniffed out explosives, and trained to react in a positive way when detecting a lethal chemical, but dogs soon become tired or bored. In an interesting aside, scientists are beginning to train honeybees to sniff out lethal chemicals using advanced video computer software to monitor the bees in order to see their reaction. Trained bees do their work for two days after which they are retuned to the hive and a new population resourced. The system is still in the process of being experimented with but the biotechnology firm Inscentinel insists that bees are more competent than sniffer dogs (BBC, 207).

Machines used to detect explosives include ion trap mobility spectrometer (ITMS) and differential mobility spectrometer (DMS) that has taken the place of the formerly used chemiluminescience. Meanwhile, amplifying fluorescence polymers (AFP) uses molecule recognition to subsume the fluorescence of a polymer.

X-ray machines are another commonly used instrument that detects explosives by examining the density of the items passing through the machine. Computed...

Similarly, especially designed machines bombard the suspected item with neutrons and read the result in order to analyze the chemical composition of the sample. Explosive compounds contain similar ratios of carbon, hydrogen, nitrogen, and oxygen and the specific machine will be able to detect these.
In short, the current technological instruments used for detection are either active or passive. Active methods include neutron activation where concentrated neutron flux is identified and controlled.

The usual chemical instruments used to detect and monitor lethal chemicals and analyze them include gas and liquid chromatography as well as various spectographies including mass spectography. Given their wildness and complications with transport, these cannot always be used for a range of counter-terrorist circumstances, and, in these cases, portable detection instruments have been created which are generally based on ion mobility spectrometry and surface acoustic waves. Complications, however, exist in that there may be (and often exist) false positives, questions of identification, and the chemical range of identification may be unclear or beyond that of the portable standard laboratory instrument. All of these may confound detection and make it more complex. Scientists are working at these complications.

Emerging technology for detection of explosives

More promising recent innovations include nuclear quadruple resonance (NQT) that uses an externally applied radio frequency magnetic field pulse at a certain preplanned and consistent frequency in order to send out a signal that can be detected with a sensitive receiver and antenna. Since its makeup is extremely sensitive to the lowest and thinnest of signals, NQR results in a low quantity if false alarms…