INVESTIGADORES
AÑON Maria Cristina
artículos
Título:
Determination of wax concentration in sunflower seed oil
Autor/es:
MARTINI, S; AÑÓN, M.C
Revista:
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY (JAOCS)
Editorial:
SPRINGER
Referencias:
Año: 2000 vol. 77 p. 1087 - 1092
ISSN:
0003-021X
Resumen:
ABSTRACT: Isothermal crystallization of waxes was studied
by using an optical setup. The induction time of crystallization
was assessed as a function of wax concentration. The relationship
was found to be a decreasing exponential curve. The wax
content of some of the solutions prepared in the laboratory was
determined by calculating the crystallization induction time.
The values obtained were compared to those from different
methods (cold test, microscopic, and turbidimetric methods).
The results obtained with the optical setup method are similar
to those obtained with other methods for concentrations greater
than 100 ppm. An analysis of variance test was used to verify
the authenticity of the values obtained with the optical method.
Results showed that the method used to determine wax concentration,
the concentration of the sample, and the relationship
between both parameters do not affect significantly the values
of percentage relative errors (P < 0.05) obtained for concentrations
greater than 100 ppm. Values obtained for wax content
within the range 0100 ppm could not be compared since the
microscopic and turbidimetric methods are not sensitive
enough, unlike the optical setup, to detect wax amounts in such
low concentrationIsothermal crystallization of waxes was studied
by using an optical setup. The induction time of crystallization
was assessed as a function of wax concentration. The relationship
was found to be a decreasing exponential curve. The wax
content of some of the solutions prepared in the laboratory was
determined by calculating the crystallization induction time.
The values obtained were compared to those from different
methods (cold test, microscopic, and turbidimetric methods).
The results obtained with the optical setup method are similar
to those obtained with other methods for concentrations greater
than 100 ppm. An analysis of variance test was used to verify
the authenticity of the values obtained with the optical method.
Results showed that the method used to determine wax concentration,
the concentration of the sample, and the relationship
between both parameters do not affect significantly the values
of percentage relative errors (P < 0.05) obtained for concentrations
greater than 100 ppm. Values obtained for wax content
within the range 0100 ppm could not be compared since the
microscopic and turbidimetric methods are not sensitive
enough, unlike the optical setup, to detect wax amounts in such
low concentrationP < 0.05) obtained for concentrations
greater than 100 ppm. Values obtained for wax content
within the range 0100 ppm could not be compared since the
microscopic and turbidimetric methods are not sensitive
enough, unlike the optical setup, to detect wax amounts in such
low concentration