STN P CEN/TS 17781
| Name: | STN P CEN/TS 17781 |
| Validity: | Valid |
| Number of pages: | 20 |
| Language: |
EN
|
| Paper: | 14,10€ |
| Electronic version |
a) Only read (without ability to print and copy)
12,69€ b) Without ability to print, with ability to copy (printscreen) 14,10€ c) With ability to print and copy (printscreen) 18,33€ |
| Slovak title | Organické, organicko-minerálne a anorganické hnojivá. Detekcia Escherichia coli |
| English title | Organic, organo-mineral and inorganic fertilizers - Detection of Escherichia coli |
| Release Date: | 01. 08. 2022 |
| Date of withdrawal: | |
| ICS: | 65.080 |
| Sorting character/National clasification code | 65 5082 |
| Level of incorporation: | idt CEN/TS 17781:2022 |
| Official Journal | 07/22 |
| Amendments | |
| Replaced by: | |
| Repleces: | |
| Note in Official Journal: | Táto predbežná slovenská technická norma je určená na overenie. Prípadné pripomienky pošlite do apríla 2024 Úradu pre normalizáciu, metrológiu a skúšobníctvo SR. |
| Subject of the standard: | 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 [1]. However, the present method was not validated for blends. This document specifies a colony-count technique at 44 °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 [4]. Strains of Escherichia coli which do not grow at 44 °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 °C. |
| Preview: | Náhľad normy (PDF) |