STN EN 17716
| Name: | STN EN 17716 |
| Validity: | Valid |
| Number of pages: | 24 |
| 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 | Rastlinné biostimulátory. Stanovenie Escherichia coli |
| English title | Plant biostimulants - Determination of Escherichia coli |
| Release Date: | 01. 03. 2025 |
| Date of withdrawal: | |
| ICS: | 65.080 |
| Sorting character/National clasification code | 46 5617 |
| Level of incorporation: | idt EN 17716:2024 |
| Official Journal | 02/25 |
| Amendments | |
| Replaced by: | |
| Repleces: | STN P CEN/TS 17716:2022-07 (46 5617) |
| Note in Official Journal: | |
| Subject of the standard: | This document gives guidance for the detection and identification of the specified microorganism Escherichia coli in technical and formulated plant biostimulants, both in liquid and solid states, and also the horizontal method for the enumeration of ß-glucuronidase-positive E. coli in plant biostimulants (both in liquid and solid states). The qualitative method described in this document is based on the detection of E. coli in a non-selective liquid medium (enrichment broth), followed by isolation on a selective agar. Other methods can be appropriate, depending on the level of detection required. NOTE 1 For the detection of E. coli, subcultures can be performed on non-selective culture media followed by suitable identification steps (e.g. using identification kits). The quantitative method described in this document uses a colony-count technique at 44 °C ± 1 °C on a solid medium containing a chromogenic ingredient for detection of the enzyme ß-glucuronidase. NOTE 2 Strains of E. coli which do not ... |
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