scholarly journals Determination of a Trace Amount of Cadmium in Water by Atomic Absorption Spectrophotometry Combined with Ammonium Pyrrolidine Dithiocarbamate-Methyl Isobutyl Ketone Extraction Using Large Aqueous Phase/Solvent Ratios

Eisei kagaku ◽  
1971 ◽  
Vol 17 (4) ◽  
pp. 251-254 ◽  
Author(s):  
YUROKU YAMAMOTO ◽  
TAKAHIRO KUMAMARU ◽  
YASUHISA HAYASHI ◽  
MAKOTO KANKE
Keyword(s):  
Atomic Absorption ◽  
Trace Amount ◽  
Methyl Isobutyl Ketone ◽  
Atomic Absorption Spectrophotometry ◽  
Pyrrolidine Dithiocarbamate ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
Absorption Spectrophotometry ◽  
Ammonium Pyrrolidine Dithiocarbamate

Collaborative Study of the Determination of Boric Acid in Foods by Atomic Absorption Spectrophotometry

1972 ◽  
Vol 55 (4) ◽  
pp. 890-891
Author(s):  
Walter Holak
Keyword(s):  
Nitrous Oxide ◽  
Boric Acid ◽  
Atomic Absorption ◽  
Methyl Isobutyl Ketone ◽  
Collaborative Study ◽  
Atomic Absorption Spectrophotometry ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
Absorption Spectrophotometry

Caviar and dried apricots containing a known amount of added boric acid were subjected to a collaborative study. The samples were digested with sulfuric-nitric acid under reflux; the boron was then complexed with 2-ethyl-1,3-hexanediol and extracted into methyl isobutyl ketone. Boron in the organic phase was determined by atomic absorption, using a nitrous oxide-acetylene flame. The recoveries were satisfactory: 103, 95, and 93% for 300, 1000, and 1600 μg boron/g apricots and 95, 90, and 92% for the corresponding caviar samples. The method has been adopted as official first action.

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).

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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