Edible fats and oils reference materials for sterol analysis with particular attention to cholesterol. Part 2. Certification of sterols mass fraction

Lognay, George; Pearse, John S.; Pocklington, Dennis; Boenke, Achim; Schurer, Bärbel; Wagstaffe, P. J.

doi:10.1039/an9952001831

Cited by 2 publications

(2 citation statements)

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“…The study has shown that total cholesterol recovery reached 100.571.4%, that cholesteryl ester was saponified quantitatively without appreciable amounts of degradation products and that the method leads to quantitative recovery of sterols regardless of the nature of the fatty material tested (Lognay et al, 1989;Marlier et al, 1990). The procedure has been used as the basis for the certification of reference materials (Lognay et al, 1992(Lognay et al, , 1995.…”

Section: Gc-ms Identificationmentioning

confidence: 98%

Sterol composition of black cumin (Nigella sativa L.) and Aleppo pine (Pinus halepensis Mill.) seed oils

Cheikh-Rouhou¹,

Besbes²,

Lognay

et al. 2008

Journal of Food Composition and Analysis

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Section: Gc-ms Identificationmentioning

confidence: 98%

Sterol composition of black cumin (Nigella sativa L.) and Aleppo pine (Pinus halepensis Mill.) seed oils

Cheikh-Rouhou¹,

Besbes²,

Lognay

et al. 2008

Journal of Food Composition and Analysis

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“…Method 1. The determination of cholesterol in fats and oils by gas chromatography [6][7][8][9][10] Samples are saponified by refluxing with ethanolic potassium hydroxide solution. Unsaponifiable matter is extracted from the mixture with diethyl ether.…”

Section: Methodsmentioning

confidence: 99%

Estimating measurement uncertainty using a cause and effect and reconciliation approachPart 2.† Measurement uncertainty estimates compared with collaborative trial expectation‡

Barwick¹,

Ellison²

1998

Anal. Commun.

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Measurement uncertainty estimates are presented for ten analytical methods, covering over 45 combinations of analyte, matrix and concentration. The uncertainty estimates were produced using a cause and effect approach published previously. Techniques include gas and liquid chromatography, elemental analysis by graphite furnace atomic absorption spectrometry, inductively coupled plasma-mass spectrometry, inductively coupled plasmaoptical emission spectrometry, and titrimetry. A range of different types of data is used, including quality control data and method validation studies. The major contributions to the uncertainty for each method and a brief description of their evaluation are given. In most cases, a combination of an experimental estimate of overall precision and the uncertainty associated with overall bias, measured as recovery, across representative sample types and analyte concentrations contributes the majority of the uncertainty, although in several cases it was essential to consider additional factors. The uncertainty estimates are also compared with collaborative trial results where available, and with reproducibility estimates obtained from the Horwitz function. † For Part 1 see ref. 1. ‡ © Copyright LGC (Teddington) Ltd 1998. § Note that in this paper 'recovery' indicates the quantity x obs /x true , where x true is an assigned value based on a known added amount or a certified reference value.

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Edible fats and oils reference materials for sterol analysis with particular attention to cholesterol. Part 2. Certification of sterols mass fraction

Cited by 2 publications

References 1 publication

Sterol composition of black cumin (Nigella sativa L.) and Aleppo pine (Pinus halepensis Mill.) seed oils

Sterol composition of black cumin (Nigella sativa L.) and Aleppo pine (Pinus halepensis Mill.) seed oils

Estimating measurement uncertainty using a cause and effect and reconciliation approachPart 2.† Measurement uncertainty estimates compared with collaborative trial expectation‡

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