Synergistic extraction-atomic spectrophotometric determination of vanadium in foods and petroleum crudes with 5,5[prime]-methylenedisalicylohydroxamic acid (MEDSHA)

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Analytical Letters; (United States)

DOI:https://doi.org/10.1080/00032719308016800· OSTI ID:6869848

Bagur, G; Gazquez, D; Sanchez, M; Martin, A M ^[1]

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1. Univ. of Granada (Spain)

A method is described for the flame atomic absorption spectrometry (AAS) determination of vanadium, down to microgram level, in food samples and petroleum crudes. The procedure is based on the synergistic extraction of the V(V)-5,5[prime]-methylene-disalicylohydroxamic acid (MEDSHA) complex with a 0.5 M tributyl phosphate (TBP) solution in isobutyl methyl ketone (IBMK). The method is highly selective and has a detection limit of 0.019 [mu]g.ml[sup [minus]1] (Vorg./Vaq. = 0.2) and of 0.006 [mu]g.ml[sup [minus]1] (Vorg./Vaq. = 0.05), with a relative standard deviation (RSD) not exceeding 1.5% at a level of 2 [mu]g.ml[sup [minus]1] and 3% at a level of 0.4 [mu]g.ml[sup [minus]1].

• OSTI ID: 6869848
• Journal Information: Analytical Letters; (United States), Journal Name: Analytical Letters; (United States) Vol. 26:1; ISSN ANALBP; ISSN 0003-2719
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
023000* -- Petroleum-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
AMINES
BUTYL PHOSPHATES
CHEMICAL ANALYSIS
DETECTION
ELEMENTS
ENERGY SOURCES
ESTERS
EXTRACTION
FOOD
FOSSIL FUELS
FUELS
HYDROXAMIC ACIDS
HYDROXY COMPOUNDS
KETONES
METALS
METHYL ISOBUTYL KETONE
NICKEL
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PETROLEUM
PHOSPHORIC ACID ESTERS
QUANTITATIVE CHEMICAL ANALYSIS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTROPHOTOMETRY
TBP
TRACE AMOUNTS
TRANSITION ELEMENTS
VANADIUM