scholarly journals Determination of chromium(III) and chromium(VI) by ammonium pyrrolidine dithiocarbamate-methyl isobutyl ketone-furnace atomic-absorption spectrometry

1988 ◽  
Vol 93 (3) ◽  
pp. 305 ◽  
Author(s):  
K.S. Subramanian
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Methyl Isobutyl Ketone ◽  
Absorption Spectrometry ◽  
Pyrrolidine Dithiocarbamate ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
Chromium Vi ◽  
Ammonium Pyrrolidine Dithiocarbamate

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.

Atomic Absorption Spectroscopic Determination of Lead Extracted from Acid-Solubilized Tissues

1978 ◽  
Vol 61 (3) ◽  
pp. 660-663
Author(s):  
Fred F Farris ◽  
Alphonse Poklis ◽  
Guy E Griesmann
Keyword(s):  
Atomic Absorption ◽  
Room Temperature ◽  
Methyl Isobutyl Ketone ◽  
Atomic Absorption Spectrophotometry ◽  
Pyrrolidine Dithiocarbamate ◽  
Isobutyl Ketone ◽  
Flame Atomic Absorption ◽  
Specialized Equipment ◽  
Wet Weight

Abstract A method is presented for determining lead in a variety of tissues. Lyophilized samples are solubilized with nitric acid at room temperature in glass screw-cap culture tubes. Following neutralization with sodium hydroxide and sodium bicarbonate, the lead is extracted into methyl isobutyl ketone as the pyrrolidine dithiocarbamate complex and analyzed by flame atomic absorption spectrophotometry. Brain, heart, liver, lung, and spleen gave recoveries ranging from 92 to 102% with standard deviations of less than 8%. Aorta, kidney, and rib were unsuitable for analysis by this method. A large number of samples can be analyzed without specialized equipment or intricate experimental steps. The detection limit is 35 ng/g tissue (wet weight) and sensitivity is approximately 140 ng/g tissue (wet weight).

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