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654927 - ČSN P CEN/TS 17765 - Organická a organominerální hnojiva - Stanovení obsahu biuretu vysokoúčinnou kapalinovou chromatografií (HPLC) | ||
| Název : 654927 - ČSN P CEN/TS 17765 - Organická a organominerální hnojiva - Stanovení obsahu biuretu vysokoúčinnou kapalinovou chromatografií (HPLC)
Označení normy : ČSN P CEN/TS 17765 Katalogové číslo : 515631 Třídící znak : 654927 Účinnost : 2023-01-01 Věstník : 2022.12 Strany : 16 Převzata :vyhlášením ve Věstníku - v angličtině | ||
| Cena : | 228.00 Kč (DPH= 0%), s DPH= 228.00 Kč | |
| ANOTACE "ČSN P CEN/TS 17765 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 method for the determination of the biuret content by high-performance liquid chromatography (HPLC) with UV detector. The method is applicable to organic and organo-mineral fertilizers containing urea. Nowadays, there is a method standardized as EN 15479 that allows the determination of biuret in urea by spectrophotometric detection. Organic and organo-mineral fertilizers contain organic matter and other compounds apart from urea that would interfere in a spectrophotometric method. HPLC allows an accurate determination of biuret by separating it from possible interfering compounds." | ||