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ID number:226176
 
Author:
Evaluation:
Published: 21.05.2007.
Language: Latvian
Level: College/University
Literature: 3 units
References: Not used
Extract

Dzīvsudraba fotometriska noteikšana:
Ar Difenilkarbazonu
Hg(II) joni pie pH 6.5-8.0 veido stabilo violeti-sarkano kompleksu ar difenilkarbazonu benzolā. Kompleks absorbē gaismu pie 562 nm. Kompleks ir nestabils pie temperatūram augstākiem par 25oC, bet absolūti stabils pret izkliedēto gaismu. Krāsojums pazūd, ja uz šķīdumu iedarbojas saules stari.


Ar vara Dietilditiokarbaminātu
Hg(II) var būt pierādīta spektrofotometriski ar vara dietilditiokarbamināta palīdzību. Vara dietilditiokarbaminātam ir brūna krāsa ( absorbē gaismu pie 440 nm), bet dzīvsudraba dietilditiokarbamināts ir bezkrāsains (absorbē 278 nm) un stabilāks par vara dietilditiokarbaminātu.…

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