Determination of percentage of RoundUp Ready soya in soya flour using real-time polymerase chain reaction: interlaboratory study.
J AOAC Int
; 86(1): 66-71, 2003.
Article
en En
| MEDLINE
| ID: mdl-12607742
An interlaboratory study was conducted to evaluate a method for determination of the percentage of RoundUp Ready (RR) soya in soya flour using Taqman technology. The method included DNA extraction from the test portion with cetyltrimethylammonium bromide buffer followed by chloroform extraction and Wizard resin cleanup steps. The DNA was then assayed with primer and probe sets specific for lectin as the endogenous control and the RR insert as the target. The percentage of RR soya in the soya fraction of the sample was calculated by using a matrix-matched standard curve. Ten samples of split-level blind duplicates were sent to 22 laboratories in 12 countries worldwide. Test portions contained 0, 0.5, 0.7,1.6, 2, and 3.9% (w/w) RR soya prepared gravimetrically from commercially available RR standard reference materials. Based on the results for test materials, the relative standard deviation for repeatability (RSDr) for the method ranged from 9.3 to 19.3% and, for reproducibility (RSDR), ranged from 20.3 to 33.7%.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Glycine max
/
Plantas Modificadas Genéticamente
/
ADN de Plantas
/
Harina
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
J AOAC Int
Año:
2003
Tipo del documento:
Article
País de afiliación:
Reino Unido
Pais de publicación:
Reino Unido