Emergency destruction methods

EMERGENCY DESTRUCTION METHODS FOR RECOVERED, EXPLOSIVELY CONFIGURED,... 

Baer, Melvin R. et al, "Investigations of Emergency Destruction Methods... 

Another emerging electron spectroscopic method for non-destructive determining local electronic structures at buried interfaces and nanostructures of high... 

Highlights The picture that emerges from the urinalysis studies described earlier for unexposed and exposed populations quite clearly represents the state of the art. Methods that require extensive sample pretreatment, involving destruction of all the organic matter in the urine matrix that is usually followed by ion-exchange to separate and preconcentrated the uranium, are labor intensive, slow, expensive, and usually do not yield full information on the isotopic composition of uranium. These are now almost universally replaced by a variety of simple sample preparation procedures that are suitable for ICPMS analysis. Some methods require simple dilution and the use of an internal standard and others even allow direct introduction of raw urine into the ICPMS (with flow injection to minimize salt burden). In addition to superb sensitivity, the ICPMS-based method readily supply detailed isotopic composition, sometimes also of the minor isotopes ( U and U) not only of the U/ U ratio. It should also be noted that the result of the urinalysis is usually used in the bio-kinetic models to assess the body burden of uranium and that these models contain... 

In recent times HPLC has emerged as a method of choice for analytical purposes. The biggest advantage that it has over other techniques is the speed of analysis which is many times more than other techniques except, perhaps, for GLC. The sample requirement is also very low for this technique and as less as a few femtograms of the sample will be analysed satisfactorily. On top of all this the detectors that are employed in HPLC are non-destructive in nature and thus the separated components can be recovered for further study. 

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