Solvent extraction separation of strontium as 18-crown-6 complex with picrate ion

Journal Article · Wed Apr 15 04:00:00 EDT 1987 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00135a027· OSTI ID:6803520

Mohite, B S; Khopkar, S M

Strontium (5-250 ..mu..g mL/sup -1/) was quantitatively extracted with 0.01 M 18-crown 6 at pH 3.0-9.0 from a solution containing 0.1 M picric acid in the presence of 2 mL of ethyl alcohol. Strontium from the organic phase was stripped with 1 M nitric acid and determined flame photometrically at 460 nm. A study of nature of extracted species revealed the composition of metal to crown ether to picrate ion as 1:1:2. Chloroform was the most suitable diluent. Most mineral acids were good stripping agents. Strontium was separated from S-block elements lead, uranium, and thorium in binary mixtures. It can also be separated from alkali, alkaline earths, and common anions in tertiary mixtures. The method was extended for analysis of strontium in milk and geological samples.

• Research Organization: Indian Institute of Technology, Bombay
• OSTI ID: 6803520
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 59:8; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400105* -- Separation Procedures
ACTINIDES
ALCOHOLS
ALKALI METALS
ALKALINE EARTH METALS
AROMATICS
BINARY MIXTURES
BIOLOGICAL MATERIALS
BODY FLUIDS
CHEMICAL ANALYSIS
CHEMICAL EXPLOSIVES
DATA
DISPERSIONS
ELEMENTS
EXPERIMENTAL DATA
EXPLOSIVES
EXTRACTION
FLAME PHOTOMETRY
FOOD
GLYCOLS
HYDROXY COMPOUNDS
INFORMATION
LEAD
MATERIALS
METALS
MILK
MIXTURES
NITRO COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
ORGANIC SOLVENTS
PH VALUE
PHENOLS
PHOTOMETRY
PICRIC ACID
POLYETHYLENE GLYCOLS
POLYMERS
QUANTITATIVE CHEMICAL ANALYSIS
ROCKS
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SOLVENTS
STRONTIUM
THORIUM
URANIUM