Premium
Determination of phosphorus in edible oils by inductively coupled plasma—Atomic emission spectrometry and oil‐in‐water emulsion of sample introduction
Author(s) -
Benzo Z.,
Murillo M.,
Marcano E.,
Gomez C.,
Garaboto A.,
Espinoza A.
Publication year - 2000
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-000-0157-7
Subject(s) - emulsion , certified reference materials , inductively coupled plasma , chemistry , analytical chemistry (journal) , calibration curve , pulmonary surfactant , sample preparation , standard solution , atomic emission spectroscopy , aqueous solution , inductively coupled plasma atomic emission spectroscopy , chromatography , detection limit , plasma , biochemistry , physics , quantum mechanics
The determination of phosphous was carried out using emulsion sample preparation followed by analysis by inductively coupled plasma‐atomic emission spectrometry. The optimal oil‐in‐water (o/w) emulsion and surfactant concentrations were found by applying response surface methodology. Two phosphorus emission lines were tested. Ethoxynonylphenol was a good choice for the emulsion preparation. The optimal concentration for the oil in the o/w emulsion and the surfactant concentrations were ca. 8.0–37% w/w and ca. 1.0–10% w/w ethoxynonylphenol, respectively, for the 213.620 nm line; and an oil phase emulsion concentration between ca. 18–32% w/w and ca. 3–8% w/w ethoxynonylphenol for the 214.911 nm emission line. Good agreement was found between calibration curves for emulsified aqueous standards solutions and o/w emulsions. The use of aqueous standards for calibration purposes is a good addition in the analysis of this type of oil sample where certified standards are not available. Recoveries ranged from 98 to 105% and from 102 to 116% for the 213 and 214 nm lines, respectively with relative standard deviations lower than 7%.