Determination of silver, antimony, bismuth, copper, cadmium and indium in ores, concentrates and related materials by atomic-absorption spectrophotometry after methyl isobutyl ketone extraction as iodides

Talanta ◽  
1986 ◽  
Vol 33 (3) ◽  
pp. 233-242 ◽  
Author(s):  
Elsie M. Donaldson ◽  
Mohui Wang
Keyword(s):  
Atomic Absorption ◽  
Methyl Isobutyl Ketone ◽  
Atomic Absorption Spectrophotometry ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
Absorption Spectrophotometry

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.

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.

The use of chelates of copper, nickel, cobalt, cadmium and zinc with heterocyclic azodyes in the AAS determination of these elements

1979 ◽  
Vol 44 (11) ◽  
pp. 3241-3255 ◽  
Author(s):  
Josef Komárek ◽  
Josef Havel ◽  
Lumír Sommer
Keyword(s):  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Isobutyl Ketone ◽  
Group Of Seven ◽  
Absorption Spectrophotometry ◽  
Copper Nickel ◽  
Nickel Cobalt ◽  
Optimum Extraction ◽  
Extraction Equilibria

Of the group of seven pyridyl, thiazolyl and quinolyl azodyes, 2-(2-pyridylazo)-1-naphthol was found to be the most useful for the extraction concentration of traces of copper, nickel, cobalt, cadmium and zinc in methyl isobutyl ketone and for their final determination by atomic absorption spectrophotometry with an acetylene-air flame or using a graphite atomizer. Atomic absorption spectrophotometry was also found to be useful in the study of extraction equilibria and for finding the optimum extraction conditions for these elements with heterocyclic azodyes.

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).

Atomic Absorption Determination of Boron in Foods

1971 ◽  
Vol 54 (5) ◽  
pp. 1138-1139
Author(s):  
Walter Holak
Keyword(s):  
Atomic Absorption ◽  
Methyl Isobutyl Ketone ◽  
Food Samples ◽  
Organic Layer ◽  
Absorption Method ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
Atomic Absorption Determination ◽  
Absorption Determination

Abstract A rapid and specific atomic absorption method is presented for the determination of boron as boric acid, which is usually added to foods at the 0.5% level. The sample is digested with sulfuric acid, nitric acid, and 30% hydrogen peroxide. Boron is then chelated with 2-ethyl-l,3-hexanediol and extracted into methyl isobutyl ketone. Absorption due to boron is measured in the organic layer and compared to standards similarly extracted and measured. Recovery studies with food samples indicate that the method may be applicable to a wide variety of foods.

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