EN 16847:2016

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.]QDYDQMHDüngemittel - Bestimmung von Komplexbildnern in Düngemitteln - Bestimmung von Heptaglukonsäure mit ChromatographieEngrais - Détermination des agents complexants dans les engrais - Identification de l'acide heptagluconique par chromatographieFertilizers - Determination of complexing agents in fertilizers - Identification of heptagluconic acid by chromatography65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 16847:2016SIST EN 16847:2016en,fr,de01-december-2016SIST EN 16847:2016SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16847
January
t r s x ICS
x wä r z r English Version
Fertilizers æ Determination of complexing agents in fertilizers æ Identification of heptagluconic acid by chromatography Engrais æ Détermination des agents complexants dans les engrais æ Identification de l 5acide heptagluconique par chromatographie
Düngemittel æ Bestimmung von Komplexbildnern in Düngemitteln æ Identifikation von Heptaglukonsäure mit Chromatographie This European Standard was approved by CEN on
s y November
t r s wä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
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t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s x z v yã t r s x ESIST EN 16847:2016

Chromatograms of the standard and a typical sample solution . 10 Annex B (informative)
Absorption spectra of the HGA . 12 Annex C (informative)
Calculation of the molar ratio HGA:Metal . 13 Annex D (informative)
Statistical results of the inter-laboratory test . 14 D.1 Inter-laboratory test . 14 D.2 Test Samples . 14 D.3 Inter-laboratory test procedure . 14 D.4 Results and statistical interpretation . 14 Annex E (informative)
Complete names of chelating agents . 16 Bibliography . 17
These substances can be detected in the chromatogram by the appearance of a peak at larger retention times. Therefore, the presence of these kinds of substances shall be taken into account when successive injections are scheduled. SIST EN 16847:2016

c) a NH2 column; internal diameter: 4,6 mm; column length: 250 mm; dp = 5 1); d) a NH2 guard-column (recommended); e) a UV-Vis detector with a 210 nm-filter; f) an integrator. 6.3 Chromatographic conditions, according to Table 1. Table 1 — Chromatographic conditions Flow rate Eluent A (7.4) % Eluent B (7.5) % 1 ml/min 75 25 6.4 Balance, Balance, with an accuracy of ± 0,1 mg. 6.5 Membrane filters. Micro membrane filters resistant to aqueous solutions, with porosity of respectively 0,45 0,2
7 Reagents Use only reagents of recognized analytical grade.
1) Phenosphere NH2 80A 5 µm 250×4,6 mm or equivalent. This is an example of suitable product available commercially. This information is given for the convenience of users of this European Standard and does not constitute an endorsement by CEN of this product. Equivalent products can be used if they can be shown to lead to the same results.
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