Peritaje de Explosivos 3 (pericial del tribunal)

[morenohijazo]

Alpha, estoy intentando entrar al meneame pero no reconoce mi contraseña, lo he vuelto a intentar y mierda. Creo que es cosa de mi antivirus, no es la 1ª vez que me pasa.

Es igual. El otro día pepelui encontró unos enlaces en inglés en los que se demuestra que las bolsas de polietileno son permeables a NG, DNT y moléculas de su tamaño:

http://www.courttv.com/archive/casefiles...201pm.html

http://www.ncjrs.gov/txtfiles1/nij/178913.txt También habla sobre UMBRALES DE DETECCIÖN

http://www.law.umkc.edu/faculty/projects...imony.html

http://www.crrel.usace.army.mil/library/...TR00-2.pdf

http://www.qualityforensics.com/PDFs/Rep...Report.pdf

MMG encontró un antecedende en UK en el que se demostró contaminación de RDX por residuos en las máquinas de fabricación siete años después...

http://www.publications.parliament.uk/pa...515-06.htm

El hilo donde encuentras todo esto es "Nuevos análisis de explosivos" a partir más o menos del 18 de Mayo. Allí puedes encontrar también párrafos como éste

e. The post blast and uninitiated explosive exhibits were packaged in
polyethylene bags and transported together in one envelope. Polyethylene
is permeable to explosive vapours such as nitroglycerin and the presence of
nitroglycerin in just one exhibit has the potential to contaminate one of
more of the others. Our investigators are instructed to use
nylon/polyethylene exhibit bags or glass or metal containers and to store
and ship post blast and uninitiated explosive exhibits separately.

The exhibits were shipped in polyethylene bags which are permeable to volatile explosives such as
NG. Clean, airtight + impermeable containers should be used. Investigators submitting exhibits to
this laboratory are instructed to ship post blast + uninitiated exhibits separately.

I would change how the items were shipped in for analysis. The bags used to contain the items were
polyethylene, which nitroglycerin has been known to difuse through and contaminate other
specimens. You should switch to a nylon bag or kapok bag and also use a pink antistatic bag. Also,
all of the items were HEAT SEALED which could be a problem with bulk explosives!

que es del "qualityforensics".

O éste

Q. And in the United Kingdom, if you intend to test for
organic explosives, would you use ordinary polyethylene bags to
collect evidence at a bombing scene?
A. Again, the polyethylene bags aren't ideal, but they're
often used.
Q. And why aren't they ideal?
A. Some high-performance explosives, particularly the liquid
ones such as nitroglycerin, are volatile and will seep through
polyethylene bags.
Q. And nitroglycerin is one ingredient of ammonium-nitrate-
based dynamites; correct?

del primer enlace que pongo (en el hilo que he citado, el párrafo es más largo)

No pongo más párrafos pues tengo que salir de casa.

Un último consejjo. Googlea con "contamination" "forensic" y "explosives"

¡A por ellos!