prEN ISO 25705

Fertilizers - Determination of urea condensates using high-performance liquid chromatography (HPLC) - Isobutylidenediurea and crotonylidenediurea (method A) and methylene-urea oligomers (method B) (ISO 25705:2016)

ISO 25705:2016 specifies methods for the determination of isobutylidene diurea (IBDU), Crotonylidene diurea (CDU) (method A) and methylene-urea oligomers (MU) (method B) in fertilizers using high-performance liquid chromatography (HPLC).
The method is applicable to all fertilizers which do not contain interfering organic compounds.

Düngemittel - Bestimmung von Harnstoffkondensaten mit Hochleistungs-Flüssigchromatographie (HPLC) - Isobutylidendiharnstoff und Crotonylidendiharnstoff (Verfahren A) und Methylenharnstoff-Oligomere (Verfahren B) (ISO 25705:2016)

Engrais - Dosage des condensats d'urée par chromatographie liquide haute performance (HPLC) - Isobutylidène diurée et crotonylidène diurée (méthode A) et oligomères de méthylène-urée (méthode B) (ISO 25705:2016)

La présente Norme internationale spécifie les méthodes de dosage de l'isobutylidène diurée (IBDU), de la crotonylidène diurée (CDU) (méthode A) et des oligomères de méthylène-urée (MU) (méthode B) dans les engrais par chromatographie liquide haute performance (HPLC).
La méthode est applicable à tous les engrais qui ne contiennent pas de composés organiques interférents.

Gnojila - Določevanje kondenzatov sečnine s tekočinsko kromatografijo visoke ločljivosti (HPLC) - Izobutilidendiurea in krotonilidendiurea (metoda A) in oligomeri metilenuree (metoda B) (ISO 25705:2016)

General Information

• Status: Not Published
• Publication Date: 03-Mar-2021
• ICS: 65.080 - Fertilizers
• Technical Committee: CEN/TC 260 - Fertilizers and liming materials
• Drafting Committee: CEN/TC 260/WG 7 - Chemical analysis
• Current Stage: 4098 - Decision to abandon - Enquiry
• Completion Date: 07-Jan-2020
• Ref Project: oSIST prEN ISO 25705:2019 - Fertilizers - Determination of urea condensates using high-performance liquid chromatography (HPLC) - Isobutylidenediurea and crotonylidenediurea (method A) and methylene-urea oligomers (method B) (ISO 25705:2016)

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO 25705:2019
01-junij-2019
Gnojila - Določevanje kondenzatov sečnine s tekočinsko kromatografijo visoke
ločljivosti (HPLC) - Izobutilidendiurea in krotonilidendiurea (metoda A) in oligomeri
metilenuree (metoda B) (ISO 25705:2016)
Fertilizers - Determination of urea condensates using high-performance liquid
chromatography (HPLC) - Isobutylidenediurea and crotonylidenediurea (method A) and
methylene-urea oligomers (method B) (ISO 25705:2016)
Düngemittel - Bestimmung von Harnstoffkondensaten mit Hochleistungs-
Flüssigchromatographie (HPLC) - Isobutylidendiharnstoff und Crotonylidendiharnstoff
(Verfahren A) und Methylenharnstoff-Oligomere (Verfahren B); Deutsche und Englische
Fassung prEN ISO 25705:2018
Engrais - Dosage des condensats d'urée par chromatographie liquide haute
performance (HPLC) - Isobutylidène diurée et crotonylidène diurée (méthode A) et
oligomères de méthylène-urée (méthode B) (ISO 25705:2016)
Ta slovenski standard je istoveten z: prEN ISO 25705
ICS:
65.080 Gnojila Fertilizers
71.040.50 Fizikalnokemijske analitske Physicochemical methods of
metode analysis
oSIST prEN ISO 25705:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 25705:2019

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oSIST prEN ISO 25705:2019
INTERNATIONAL ISO
STANDARD 25705
First edition
2016-04-01
Fertilizers — Determination of
urea condensates using high-
performance liquid chromatography
(HPLC) — Isobutylidenediurea and
crotonylidenediurea (method A) and
methylen-urea oligomers (method B)
Engrais — Dosage des condensats d’urée par chromatographie
liquide haute performance (CLHP) — Isobutylidène diurée et
crotonylidène diurée (méthode A) et oligomères de méthylène-urée
(méthode B)
Reference number
ISO 25705:2016(E)
©
ISO 2016

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oSIST prEN ISO 25705:2019
ISO 25705:2016(E)

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All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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ii © ISO 2016 – All rights reserved

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oSIST prEN ISO 25705:2019
ISO 25705:2016(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Sampling and sample preparation . 1
5 Method A: Determination of CDU and IBDU . 1
5.1 Principle . 1
5.2 Reagents. 1
5.3 Apparatus . 2
5.4 Procedure .
...