Extractive spectrophotometric determination of niobium(V) with thiocyanate and amides

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Analytical Letters; (United States)

DOI:https://doi.org/10.1080/00032719108052968· OSTI ID:5891913

Patel, K S ^[1]; Das, M ^[2]

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1. Inst. f. Umweltschutz, Berlin (West Germany)
2. Girls College, Bhilai (India)

A new procedure for extractive spectrophotometric determination of niobium(V) with thiocyanate and 10 amides (derived from condensation of aceticanhydride with amines) is described. The value of molar absorptivity of the complexes in benzene lie in the range of (3.10 - 4.20){times}10{sup 4} 1 mole{sup {minus}1} cm{sup {minus}1} at absorption maximum 395 - 400 nm. Among these, the most sensitive compound, N-octylacetamide has been chosen for the detailed studies. The limit for detection is 0.01 {mu}g Nb/ml of the aqueous solution. The effect of various analytical variables on the determination of the metal has been examined. The method is simple, rapid and being free from interferences of almost all metal ions except Mo. Its application for the analysis of the metal to ore, slag, steel and water has been tested.

• OSTI ID: 5891913
• Journal Information: Analytical Letters; (United States), Journal Name: Analytical Letters; (United States) Vol. 24:7; ISSN ANALB; ISSN 0003-2719
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
54 ENVIRONMENTAL SCIENCES
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ABSORPTION SPECTROSCOPY
AMIDES
ANIONS
ANTITHYROID DRUGS
CARBONIC ACID DERIVATIVES
CATIONS
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COMPLEXES
DRUGS
ELEMENTS
EXTRACTION
HORMONE ANTAGONISTS
HYDROGEN COMPOUNDS
IMPURITIES
IONS
LIQUID WASTES
METALS
NIOBIUM
NIOBIUM COMPLEXES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
SAMPLE PREPARATION
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTROSCOPY
STOICHIOMETRY
THIOCYANATES
TRACE AMOUNTS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
WASTE WATER
WASTES
WATER