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  • Author or Editor: M. Suryanarayana x
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Abstract  

A simple carrier-free method has been developed for estimating 0.1 to 1.1 Bq of106Ru in urine. The organic matter present in urine samples was completely destroyed by wet ashing using nitric acid-peroxide mixture in presence of sulfuric acid. Ruthenium was oxidized to tetroxide using potassium periodate and allowed to react in-situ with polyethylene powder. The powder was separated, washed, pelletized and its -activity was counted. Recovery of106Ru is found to be better than 80% with a minimum detection limit of 0.2 Bq/dm3 which is less than the DRL value specified by International Commission on Radiological Protection (ICRP).

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Abstract  

Flash pyrolysis of fentanyl and its analogues has been studied on pyrolysis-gas chromatograph-mass spectrometer (Py-GC-MS) system. Initial pyrolytic fragmentation of these compounds led to the formation of N-substituted-1,2,5,6-tetrahydropyridine and N-phenylpropanamide as the primary pyrolytic products. Moreover, depending up on the furnace temperature, these pyrolytic products can also undergo further fragmentation to give different compounds. We, herein, discuss the probable fragmentation routes of parent as well as pyrolytic products. This study will be useful while developing technologies for thermal aerosol generation of fentanyl and related compounds.

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