BS PD CEN/TS 17781:2022 PDF Download
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Organic, organo-mineral and inorganic fertilizers. Detection of <i>Escherichia coli</i>
standard by BSI Group, 05/06/2022
Description
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 β-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 β-glucuronidase negative, such as Escherichia coli O157, will not be detected. Detected microorganisms are presumptively determined β-glucuronidase-positive Escherichia coli, since some Enterobacteriaceae, in particular Shigella and Salmonella, can also show β-glucuronidase activity at 44 °C.
All current amendments available at time of purchase are included with the purchase of this document.
Product Details
- Published:
- 05/06/2022
- ISBN(s):
- 9780539179613
- Number of Pages:
- 22
- File Size:
- 1 file , 1.1 MB
- Product Code(s):
- 30438606, 30438606, 30438606
- Note:
- This product is unavailable in Ukraine, Russia, Belarus