BS PD CEN/TS 17781:2022

Organic, organo-mineral and inorganic fertilizers. Detection of Escherichia coli

BSI Group, 05/06/2022

Publisher: BS

File Format: PDF

$90.00$180.34


Published:06/05/2022

Pages:22

File Size:1 file , 1.1 MB

Note:This product is unavailable in Ukraine, Russia, Belarus

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.

More BS standard pdf

BS DD ENV ISO/TR 13843:2001

BS DD ENV ISO/TR 13843:2001

Water quality. Guidance on validation of microbiological methods

$144.00 $289.56

BS DD ENV 12836:2001

BS DD ENV 12836:2001

Surface active agents. Determination of the water number of alkoxylated products

$118.00 $236.73

BS HB 10190:2001

BS HB 10190:2001

IMS: The framework (Integrated Management Systems Series)

$116.00 $233.20

BS 7373-1:2001

BS 7373-1:2001

Guide to the preparation of specifications-Guide to preparation

$90.00 $180.34