Navigation Links
Are those liquids explosive?
Date:8/18/2011

A team of researchers from the University of the Basque Country (Spain) has developed a method to determine the chemical composition of liquids seized by police and suspected to be explosive. Some of the samples analysed contained substances hazardous to health, such as methanol and boric acid.

Each year police forces seize tonnes of pyrotechnic substances which, in principle, are for indoor firework manufacturing (i.e. flares or those used in artistic or sporting events), but which also may end up in the hands of violent groups and hooligans.

A group of chemists from the University of the Basque Country (UPV/EHU, Spain) has developed a method that offers judges conclusive scientific tests on the nature of these liquids. Until now, many resources have been allocated to detecting high explosives such as TNT, but very few for less powerful ones which can also be dangerous.

"We have found a relatively simple way to detect explosive or flammable compounds in suspicious liquids, by combining four techniques commonly used in laboratories," stated Kepa Castro, UPV/EHU researcher and the study's lead author.

On one hand, the molecular composition of the substances is obtained using two spectroscopy techniques (Raman and infrared) that can be performed with mobile devices in airports, customs or ports offices.

On the other hand, energy-dispersive spectroscopy (EDS) combined with scanning electron microscopy (SEM) images is used to determine which elements are in the sample.

"With the SEM-EDS technique we are able to observe how the sample's elements are distributed and grouped (for example, calcium with sulphur suggests that calcium sulphate is present)" explains Castro, "and by crossing data from four different techniques, we are able to check and confirm the results."

Samples with dangerous compounds

To check the method, the scientists applied it to five seized liquid samples. Four of the samples presented substances used in indoor fireworks. Alcohols, such as isopropyl and methanol, are used to solubilise compounds and the scientists managed to produce coloured flames with them.

The team was surprised to find methanol being used as a main solvent, given that this compound is very toxic for human beings, causing acidosis and blindness, and it is restricted in many countries.

Boric acid was also detected in one of the other sample liquids. This substance has recently been added to the list of Substances of Very High Concern (SVHC) as part of the European Union's REACH Regulation (Registration, Evaluation, Authorisation and Restriction of Chemical substances). These acids can have a negative effect on the human reproduction system.

Strangely, no flammable or explosive substances were found in the fifth sample. "It is probably a flame retardant, which is precisely used in fire prevention," suggested the researcher.


'/>"/>

Contact: SINC
info@agenciasinc.es
34-914-251-820
FECYT - Spanish Foundation for Science and Technology
Source:Eurekalert  

Related biology technology :

1. In the Midst of International Economic Crisis, VidaCura Offers a Helping Hand to Those Without Insurance
2. Independent Study Reveals SYNVISC(R) Offers Longer Knee Pain Relief and Greater Patient Satisfaction for Those Suffering from Osteoarthritis of the Knee
3. 4th BTLtec Conference on 24-25 Sep in Graz, Austria features Biomass to Liquids Innovators Sharing Updates on Pyrolysis and Gasification Technologies, Syngas Application, BTL Value Chain and a Site Visit to the Biomass CHP Gussing Plant.
4. 0.2 second test for explosive liquids
5. Mescal worm test shows DNA leaks into preservative liquids
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Are those liquids explosive?
(Date:6/23/2016)... - FACIT has announced the creation of a ... Propellon Therapeutics Inc. ("Propellon" or "the Company"), to ... of first-in-class WDR5 inhibitors for the treatment of ... an exciting class of therapies, possessing the potential ... patients. Substantial advances have been achieved with the ...
(Date:6/23/2016)... ... June 23, 2016 , ... Charm Sciences, Inc. is ... has received AOAC Research Institute approval 061601. , “This is another AOAC-RI approval ... Bob Salter, Vice President of Regulatory and Industrial Affairs. “The Peel Plate methods ...
(Date:6/23/2016)... FRANCISCO , June 23, 2016   EpiBiome ... has secured $1 million in debt financing from Silicon ... ramp up automation and to advance its drug development ... its new facility. "SVB has been an ... beyond the services a traditional bank would provide," said ...
(Date:6/23/2016)... NC (PRWEB) , ... June 23, 2016 , ... In ... University Hospital in Denmark detail how a patient who developed lymphedema after being treated ... tissue. The results could change the paradigm for dealing with this debilitating, frequent side ...
Breaking Biology Technology:
(Date:4/14/2016)... BioCatch ™, the global ... the appointment of Eyal Goldwerger as CEO. ... Goldwerger,s leadership appointment comes at a time of significant ... of its platform at several of the world,s largest ... unique cognitive and physiological factors, is a winner of ...
(Date:3/31/2016)... March 31, 2016   ... or the "Company") LegacyXChange is excited to ... its soon to be launched online site for trading ... ) will also provide potential shareholders a sense ... technology to an industry that is notorious for fraud. ...
(Date:3/29/2016)... March 29, 2016 LegacyXChange, Inc. ... "LEGX" and SelectaDNA/CSI Protect are pleased to announce our ... in a variety of writing instruments, ensuring athletes signatures ... created collectibles from athletes on LegacyXChange will be assured ... the DNA. Bill Bollander , CEO ...
Breaking Biology News(10 mins):