Liquid-liquid extraction of zinc and cadmium with 1,2-naphthoquinone thiosemicarbazone into methyl isobutyl ketone, and their simultaneous determination by atomic-absorption spectrophotometry

1983 ◽  
Vol 79 (3-4) ◽  
pp. 315-324 ◽  
Author(s):  
M. Silva ◽  
M. Valc�rcel
Keyword(s):  
Atomic Absorption ◽  
Simultaneous Determination ◽  
Methyl Isobutyl Ketone ◽  
Atomic Absorption Spectrophotometry ◽  
Liquid Extraction ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
Absorption Spectrophotometry ◽  
Liquid Liquid Extraction

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.

scholarly journals Tantalum and Niobium Selective Extraction by Alkyl-Acetophenone

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 654 ◽  
Author(s):  
Moussa Toure ◽  
Guilhem Arrachart ◽  
Jean Duhamet ◽  
Stephane Pellet-Rostaing
Keyword(s):  
Extraction Efficiency ◽  
Methyl Isobutyl Ketone ◽  
Selective Extraction ◽  
Extraction Process ◽  
Liquid Extraction ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
Waste Solution ◽  
Liquid Liquid Extraction ◽  
D Values

A study has been carried out on Ta and Nb recovery by a liquid-liquid extraction process using 4-methylacetophenone (4-MAcPh) as the organic phase. The 4-MAcPh was compared to methyl isobutyl ketone (MIBK) with respect to extraction efficiencies (D values) at different concentrations of H2SO4 in the aqueous phase. The results showed a similar extraction of Nb for both solvents. However, for Ta, extraction efficiency is increased by a factor of 1.3 for 4-MAcPh. In addition, the MIBK solubilized completely after 6 mol∙L−1 of H2SO4 against only a loss of 0.14–4% for 4-MAcPh between 6 and 9 mol∙L−1 of H2SO4. The potential of 4-MAcPh has also been studied to selectively recover Ta from a model capacitor waste solution. The results showed a selectivity for Ta in the presence of impurities such as Ag, Fe, Ni and Mn. The 4-MAcPh also presents the advantage of having physicochemical properties adapted to its use in liquid-liquid extraction technologies such as mixer-settlers.

Atomic Absorption Spectrophotometry: Determination of Chromium in Plants

1975 ◽  
Vol 58 (3) ◽  
pp. 433-435
Author(s):  
Earle E Cary ◽  
Oscar E Olson
Keyword(s):  
Atomic Absorption ◽  
Biological Materials ◽  
Atomic Absorption Spectrophotometry ◽  
Liquid Extraction ◽  
Absorption Spectrophotometry ◽  
Wet Digestion ◽  
Liquid Liquid Extraction ◽  
Chromium Recovery

Abstract A previously reported method for the determination of chromium in plants and biological materials has been simplified. The method, which involves wet digestion, isolation and concentration of chromium by liquid-liquid extraction, and final determination by atomic absorption spectrophotometry, is sensitive to about 20 ng chromium. Recovery studies and analysis of standard materials show that this method is reliable.

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