Determination of ultratrace metals in hydrogenated vegetable oils and fats View Full Text


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Article Info

DATE

1983-04

AUTHORS

A. M. Nash, T. L. Mounts, W. F. Kwolek

ABSTRACT

Ultratrace levels of nickel, chromium, copper and iron occurring in hydrogenated vegetable oil products were estimated by dispersion of the samples in 4 methyl-2-pentanone and atomic absorption analysis by the graphite furnace technique. The principal goals in establishing the analytical methods were improved sensitivity to metals at low levels and applicability to limited amounts of products. Using reproducibility and linearity of response as criteria, optimum oil concentration in solvent and instrument parameters were established. For a series of commercial products, the method of standard addi-tions was adopted to correct for matrix differences between the products and salad oil-based standards. The range for the metals was determined in five cooking oils: Ni, 29–207 ppb; Cr, 1–5 ppb; Cu, 13–37 ppb; and Fe, 138–301 ppb; in recovered oils from five margarines: Ni, 34–70 ppb; Cr, 2–12 ppb; Cu, 26–58 ppb; and Fe, 239–540 ppb; and in five solid shortenings: Ni, 592–2772 ppb; Cr, 8–35 ppb; Cu, 26–108 ppb. More... »

PAGES

811-814

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02787433

DOI

http://dx.doi.org/10.1007/bf02787433

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1023855601


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