Abstract
Abstract To test the method of Nesheim et al., 6 samples wert; analyzed in 13 laboratories. The samples encompassed a blank and 5 samples containing one or more ochratoxins in the range 50–200 μg/kg. Two samples were spiked with the 4 ochratoxin standards and 3 were spiked with barley naturally contaminated with ochratoxin A. The confirmation of identity of ochratoxins A and B by preparation of their ethyl ester derivatives was also tested. The average recovery of standard ochratoxin A was 112% at levels of 45 and 90 μg/kg, with a 27.1% coefficient of variation calculated from analysis of variance, one analyst, one replicate. Similar satisfactory results were obtained for the ethyl esters of A and B at a level of 120 μg/kg. The results were unsatisfactory for ochratoxin B and for the esters of A and B at the 60 μg/kg level. The chemical confirmation test was satisfactory for both ochratoxins A and B. The method, including chemical confirmation, has been adopted as official first action as quantitative for ochratoxin A and qualitative for the other toxins.
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Claims 6
Claim · model-written summary
The average recovery of standard ochratoxin A was 112% in barley.
- Taxon
- Barley
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Hordeum vulgaret0 - Outcome
- average recovery of standard ochratoxin Ae1
- Value
- 112%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“in Barley”
e1“The average recovery of standard ochratoxin A was 112% at levels of 45 and 90 μg/kg, with a 27.1% coefficient of variation calculated from analysis of variance”
Claim · model-written summary
The coefficient of variation of the ochratoxin A recovery was 27.1%.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- coefficient of variatione1
- Value
- 27.1%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Barley”
e1“The average recovery of standard ochratoxin A was 112% at levels of 45 and 90 μg/kg, with a 27.1% coefficient of variation calculated from analysis of variance”
Claim · model-written summary
Ethyl esters of ochratoxins A and B gave satisfactory results at 120 µg/kg in barley.
- Taxon
- BarleyHordeum vulgaret0
- Compound
- ethyl esters of A and Be2
- Outcome
- satisfactory resultse2
- Value
- 120 μg/kge2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Barley”
e2“Similar satisfactory results were obtained for the ethyl esters of A and B at a level of 120 μg/kg”
Claim · model-written summary
Results for ochratoxin B and the esters of A and B at 60 µg/kg were unsatisfactory in barley.
- Taxon
- BarleyHordeum vulgaret0
- Compound
- ochratoxin Be3
- Outcome
- results were unsatisfactorye3
- Value
- 60 μg/kge3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Barley”
e3“The results were unsatisfactory for ochratoxin B and for the esters of A and B at the 60 μg/kg level”
Claim · model-written summary
The chemical confirmation test was satisfactory for ochratoxins A and B in barley.
- Taxon
- BarleyHordeum vulgaret0
- Compound
- ochratoxins A and Be4
- Outcome
- chemical confirmation teste4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Barley”
e4“The chemical confirmation test was satisfactory for both ochratoxins A and B”
Claim · model-written summary
The method with chemical confirmation was adopted as official first action, quantitative for ochratoxin A and qualitative for the other toxins.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- adopted as official first actione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Barley”
e5“The method, including chemical confirmation, has been adopted as official first action as quantitative for ochratoxin A and qualitative for the other toxins”