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Quantification of 1,8‐cineole and of its metabolites in humans using stable isotope dilution assays
Molecular Nutrition & Food Research, 2010AbstractThe metabolism of 1,8‐cineole after ingestion of sage tea was studied. After application of the tea, the metabolites 2‐hydroxy‐1,8‐cineole, 3‐hydroxy‐1,8‐cineole, 9‐hydroxy‐1,8‐cineole and, for the first time in humans, 7‐hydroxy‐1,8‐cineole were identified in plasma and urine of one volunteer.
Kathie, Horst, Michael, Rychlik
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Quantitative Analysis of Beer Aromatic Alcohols Using Stable Isotope Dilution Assay
Journal of the American Society of Brewing Chemists, 2002A quantitative assay of beer aromatic alcohols was developed using gas chromatography (GC) in conjunction with stable isotope dilution analysis (SIDA). Quantification using SIDA is not subject to instrumental and/or sample manipulation variation as any analytical variation has a similar effect on the aromatic alcohols and their corresponding labeled ...
Jean-Pierre Dufour +6 more
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CHAPTER 25. Quantitation of Folates by Stable Isotope Dilution Assays
2012Folates are a group of water-soluble vitamins involved in the metabolism of one-carbon groups. The most common analytical method for folates is a microbiological assay, which is not able to differentiate between single folate vitamers. Stable isotope dilution assays (SIDAs) for folates are based on the use of stable isotopologues as internal standards ...
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Quantitative determination of .beta.-damascenone in foods using a stable isotope dilution assay
Journal of Agricultural and Food Chemistry, 1991The aim was to develop such an assay for β-damascenone and to apply it for the analysis of roasted coffee (powder and brew), black tea, honey and beer samples.
Alina Sen +3 more
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Quantitation of potent odorants of virgin olive oil by stable‐isotope dilution assays
Journal of the American Oil Chemists' Society, 1993The potent odorants of four olive oil samples differing in flavor were quantitated, and their odor activity values (OAVs) were calculated by dividing the concentrations of the odorants in the oil samples by the flavor threshold values in the oil. The odorants with higher OAVs were contrasted with the different notes of the flavor profiles of the olive ...
Helmut Guth, Werner Grosch
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Mycotoxin Research, 2011
The Alternaria mycotoxin tenuazonic acid (TA) was quantified in fruit juices (n = 50), cereals (n = 12) and spices (n = 38) using a recently developed stable isotope dilution assay (SIDA). [(13) C6,(15) N]-TA was used as the internal standard. Method validation revealed low limits of detection (LODs) of 0.15 μg/kg (fruit juices), 1.0 μg/kg (cereals ...
Stefan, Asam +3 more
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The Alternaria mycotoxin tenuazonic acid (TA) was quantified in fruit juices (n = 50), cereals (n = 12) and spices (n = 38) using a recently developed stable isotope dilution assay (SIDA). [(13) C6,(15) N]-TA was used as the internal standard. Method validation revealed low limits of detection (LODs) of 0.15 μg/kg (fruit juices), 1.0 μg/kg (cereals ...
Stefan, Asam +3 more
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Analytica Chimica Acta, 2014
Ochratoxin A (OTA) exhibits potent nephrotoxic, carcinogenic and teratogenic effects and its maximum level in wines has been set to 2 μg L(-1) by regulation. Consequently, the analytical procedures for OTA determination in wines have to be both very sensitive and reliable.
Aurélie, Roland +4 more
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Ochratoxin A (OTA) exhibits potent nephrotoxic, carcinogenic and teratogenic effects and its maximum level in wines has been set to 2 μg L(-1) by regulation. Consequently, the analytical procedures for OTA determination in wines have to be both very sensitive and reliable.
Aurélie, Roland +4 more
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Journal of Agricultural and Food Chemistry, 2008
On the basis of a stable isotope dilution assay and derivatization with 2-mercaptobenzoic acid, the presence of the carcinogenic glycidamide ( 2) in processed foods was verified for the first time. Using (13)C-labeled 2 as the internal standard and the formation of the thioether derivatives, a new stable isotope dilution assay for the quantitation of 2
Michael, Granvogl +3 more
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On the basis of a stable isotope dilution assay and derivatization with 2-mercaptobenzoic acid, the presence of the carcinogenic glycidamide ( 2) in processed foods was verified for the first time. Using (13)C-labeled 2 as the internal standard and the formation of the thioether derivatives, a new stable isotope dilution assay for the quantitation of 2
Michael, Granvogl +3 more
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Journal of Agricultural and Food Chemistry, 2002
[2H4]Folic acid was synthesized by deuterating p-aminobenzoic acid, which was then coupled to glutamic acid and 6-formylpterin. Using [2H4]folic acid as starting component enabled the preparation of labeled vitamers tetrahydrofolate, 5-formyltetrahydrofolate, 5-methyltetrahydrofolate, and 10-formylfolate which were characterized by electrospray mass ...
Achim, Freisleben +2 more
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[2H4]Folic acid was synthesized by deuterating p-aminobenzoic acid, which was then coupled to glutamic acid and 6-formylpterin. Using [2H4]folic acid as starting component enabled the preparation of labeled vitamers tetrahydrofolate, 5-formyltetrahydrofolate, 5-methyltetrahydrofolate, and 10-formylfolate which were characterized by electrospray mass ...
Achim, Freisleben +2 more
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Analytical and Bioanalytical Chemistry, 2015
Stable isotope dilution assays (SIDAs) are becoming ever commoner in mycotoxin analysis, and the number of synthesized or commercially available isotopically labelled compounds has greatly increased in the 7 years since our last review dealing with this topic. Thus, this review is conceived as an update for new applications or improvements of SIDAs for
Asam, Stefan, Rychlik, Michael
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Stable isotope dilution assays (SIDAs) are becoming ever commoner in mycotoxin analysis, and the number of synthesized or commercially available isotopically labelled compounds has greatly increased in the 7 years since our last review dealing with this topic. Thus, this review is conceived as an update for new applications or improvements of SIDAs for
Asam, Stefan, Rychlik, Michael
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