Liquid-liquid extraction, photometric and atomic absorption spectrophotometric determination of mercury

Journal Article · Tue Jan 01 00:00:00 EST 1985 · Anal. Lett.; (United States)

DOI:https://doi.org/10.1080/00032718508064484· OSTI ID:5982865

Agrawal, Y K; Desai, T A

A selective and sensitive spectrophotometric and atomic absorption spectrophotometric method is developed for the determination of traces of mercury with N-phenylcinnamohydroxamic acid (PCHA) in the environment. Mercury is extracted into a chloroform solution of PCHA at pH 8.5-10.0 and determined by AAS. The mercury hydroxamate binary complex is yellow in color having a maximum absorbance at 390 nm and molar absorptivity 4.3 x 10/sup 3/ l mol/sup -1/ cm/sup -1/, sandell sensitivity 0.0466 ..mu..g/cm/sup 2/. The ternary system using 1-(2-pyridylazo) 2-naphthol has molar absorptivity 8.82 x 10/sup 3/ l mol/sup -1/ cm/sup -1/ at 550 nm, sandell sensitivity 0.0228 ..mu..g/cm/sup 2/. Beer's law is obeyed in the concentration range of 2.37-38.0 ppm and 0.80-19.5 ppm of mercury for binary and ternary system, respectively. The extraction of Hg-PCHA binary system is studied with a liquid cation exchanger, bis-(2-ethyl hexyl) phosphoric acid (HDEHP) and found to have better selectivity than Hg-PCHA-PAN system. The molar absorptivity of the Hg-PCHA-HDEHP system is 8.82 x 10/sup 3/ l mol/sup -1/ cm/sup -1/ at 390 nm and Beer's law is obeyed in the concentration range of 0.47-20 ppm of mercury. The present method is applied to the determination of mercury in eye drops, aurvedic drugs and environmental samples. 24 references, 3 tables.

• Research Organization: Univ. of Baroda, India
• OSTI ID: 5982865
• Journal Information: Anal. Lett.; (United States), Vol. 18:B20
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CHLOROFORM
SOLVENT PROPERTIES
DRUGS
QUANTITATIVE CHEMICAL ANALYSIS
ENVIRONMENTAL MATERIALS
MERCURY
ABSORPTION SPECTROSCOPY
SOLVENT EXTRACTION
SPECTROPHOTOMETRY
EXPERIMENTAL DATA
HYDROXAMIC ACIDS
MERCURY COMPLEXES
PH VALUE
SENSITIVITY
TRACE AMOUNTS
AMINES
CHEMICAL ANALYSIS
CHLORINATED ALIPHATIC HYDROCARBONS
COMPLEXES
DATA
ELEMENTS
EXTRACTION
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROXY COMPOUNDS
INFORMATION
MATERIALS
METALS
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
SEPARATION PROCESSES
SPECTROSCOPY
400104* - Spectral Procedures- (-1987)
400105 - Separation Procedures