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- PSA - Model 10.570 - UV Cracker
PSA - Model 10.570 -UV Cracker
The PSA 10.570 UV Cracker utilizes the energy from a low pressure mercury lamp to enhance the rate of certain reactions. This allows reaction times to be reduced from 30 minutes to 1 minute, so allowing reactions to be carried out online. This can either be for the online determination of total mercury or for post column derivitisation in the speciation analysis of mercury or arsenic using atomic fluorescence. For example, in the case of mercury speciation, organomercury needs to be oxidised to Hg2+ prior to vapour generation and subsequent determination by atomic fluorescence. By adding the UV Cracker to the system this reaction can be carried out in less than 1 minute.
Another application is in the determination of arsenobetane [1]. This common arsenic species is extremely stable and does not easily react to form a volatile hydride. However, the UV energy in the presence of persulphate allows this species to be converted to the more reactive arsenate on line.
These applications all allow the sample treatment to be automated, minimising losses or errors often introduced by laboratory personnel while at the same time reducing sample pretreatment times.