New approach to the fast screening of plant oil samples for F-, Cl-, Br- and S-organic compounds on the trace level

Publication date: 1 April 2016
Source:Talanta, Volume 150
Author(s): M.E. Chivarzin, I.A. Revelsky, A.V. Nikoshina, A.N. Buldyzkova, D.A. Chepeliansky, A.I. Revelsky, A.K. Buriak
The fast method of the simultaneous determination of F⁻, Cl⁻, Br⁻ and SO4²⁻ anions in the deionized water on the trace level by ion chromatography using thorough cleaning of respective water containers, 10μM NaHCO3 water solution as eluent, short Metrohm (50×4mm) separation column and a large water volume injection is proposed. Calculated detection limits are 10⁻⁹–10⁻⁸% depending on the element.The method for the fast screening of plant oil samples for the total fluorine-, chlorine-, bromine- and sulfur-organic compounds content (calculated for the respective elements) on the trace level is developed.It is based on the high temperature combustion of oil sample in oxygen flow, absoption of the conversion products in deionized water and whole absorbate volume analysis for F⁻, Cl⁻, Br⁻ and SO4²⁻ anions, corresponding to the respective elements, using the developed method of these anions analysis by ion chromatography.The samples of soya, olive, sunflower and cotton seed oil were analyzed. The method detection limits (for 1mg sample) were 2×10⁻⁶%, 2×10⁻⁶%, 5×10⁻⁶% and 5×10⁻⁶% for fluorine, chlorine, bromine and sulfur, respectively. The relative standard deviation was≤15%. The method gives the compressed information about the total content of all target and nontarget fluorine-, chlorine-, bromine- and sulfur-organic compounds in plant oils.

Graphical abstract

from #Medicine via ola Kala on Inoreader http://ift.tt/1Zh0yPE
via IFTTT