scholarly journals Spectrophotometric determination of niobium with methyl-isobutyl ketone (MIBK)-phenylfluorone after separation of niobium and tantalum with Amberlite LA-2-benzene solution

1967 ◽  
Vol 16 (9) ◽  
pp. 922-926 ◽  
Author(s):  
Yukio KITANO ◽  
Wataru ISHIBASHI ◽  
Shoji SATO
Keyword(s):  
Spectrophotometric Determination ◽  
Methyl Isobutyl Ketone ◽  
Benzene Solution ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone

Determination of Some Nitrophenols by Atomic Absorption Spectrometry (AAS) After Extraction of Ionic Associates Involving the Bipyridylocopper(II) or Phenanthrolinocopper(II) Complex

1994 ◽  
Vol 59 (10) ◽  
pp. 2227-2234 ◽  
Author(s):  
Václav Stužka ◽  
Jaromír Souček
Keyword(s):  
Molecular Weight ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Methyl Isobutyl Ketone ◽  
Absorption Spectrometry ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
Indirect Determination ◽  
Ionic Associates

A new method has been developed for the indirect determination of nitroso- and nitrophenols by atomic absorption spectrometry (AAS) after extraction of ionic associates involving bipyridylocopper(II) (CuDP) or phenanthrolinocopper(II) (CuPH) complexes. Nitrobenzene and methyl isobutyl ketone appeared to be suitable for the extraction. It was possible to determine several tenths to hundredths of a milligram of nitrophenol in a litre. Extractable associates with CuDP and CuPH are formed by phenols possessing two substituents or by higher molecular weight phenols such as naphthol or hydroxyquinoline. Monosubstituted phenols fail to form associates of this kind.

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