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654944 - ČSN P CEN/TS 17781 - Organická, organominerální a anorganická hnojiva - Detekce Escherichia coli | ||
| Název : 654944 - ČSN P CEN/TS 17781 - Organická, organominerální a anorganická hnojiva - Detekce Escherichia coli
Označení normy : ČSN P CEN/TS 17781 Katalogové číslo : 515821 Třídící znak : 654944 Účinnost : 2023-01-01 Věstník : 2022.12 Strany : 24 Převzata :vyhlášením ve Věstníku - v angličtině | ||
| Cena : | 335.00 Kč (DPH= 0%), s DPH= 335.00 Kč | |
| ANOTACE "ČSN P CEN/TS 17781 This document is applicable to fertilizing products, which are classified as PFC 1(A) and PFC 1(B) or the PFC 1(A) and PFC 1(B) component in PFC 7 of Regulation (EU) 2019/1009. However, the present method was not validated for blends. This document specifies a colony-count technique at 44 st.C on a solid medium containing a chromogenic ingredient for the detection of the enzyme ß-glucuronidase. The method is based on ISO 16649-2. Strains of Escherichia coli which do not grow at 44 st.C and, in particular, those that are ß-glucuronidase negative, such as Escherichia coli O157, will not be detected. Detected microorganisms are presumptively determined ß-glucuronidase-positive Escherichia coli, since some Enterobacteriaceae, in particular Shigella and Salmonella, can also show ß-glucuronidase activity at 44 st.C." | ||