Plant biostimulants - Determination of chromium(VI)

This document was developed to provide a method for verifying that hexavalent chromium (CrVI) is not present in plant biostimulants in a concentration that exceeds the respective limits outlined in the EU Regulation on Fertilising Products [1].
This document is applicable to all types of plant biostimulants (solid and liquid ) used in agriculture.
The method described is suitable to quantify the chromium(VI) content in plant biostimulants down to 2 mg/kg.
The results obtained from this method are strictly dependent on the extraction conditions. Results obtained by using other extraction procedures (extraction solution, pH, extraction time, etc.) are not comparable with the results produced by the procedure described in this document.

Pflanzen-Biostimulanzien - Bestimmung von Chrom(VI)

Dieses Dokument wurde erarbeitet, um ein Verfahren für die Verifizierung bereitzustellen, dass sechswertiges Chrom (CrVI) nicht in einer Konzentration in Pflanzen-Biostimulanzien vorhanden ist, die die in der EU Verordnung zu Düngeprodukten [1] aufgeführten Grenzwerte übersteigt.
Dieses Dokument ist anzuwenden für alle Arten von Pflanzen-Biostimulanzien (in fester Form und in flüssiger Form ), die in der Landwirtschaft eingesetzt werden.
Das beschriebene Verfahren ist geeignet, den Chrom(VI) Gehalt in Pflanzen-Biostimulanzien ab 2 mg/kg quantitativ zu bestimmen.
Die mit dem beschriebenen Verfahren erzielten Ergebnisse sind streng von den Extraktionsbedingungen abhängig. Ergebnisse, die mit anderen Extraktionsverfahren (Extraktionslösung, pH Wert, Extraktionszeit usw.) erzielt wurden, sind nicht mit den Ergebnissen vergleichbar, die mit dem in diesem Dokument beschriebenen Verfahren erzielt wurden.

Biostimulants des végétaux - Dosage du chrome(VI)

Le présent document a été élaboré pour fournir une méthode permettant de vérifier que le chrome hexavalent (CrVI) n’est pas présent dans les biostimulants des végétaux à une concentration dépassant les limites correspondantes indiquées dans le Règlement UE sur les fertilisants [1].
Le présent document s’applique à tous les types de biostimulants des végétaux (solides et liquides ) utilisés en agriculture.
La méthode décrite est adaptée à la quantification dans les biostimulants des végétaux de teneurs en chrome(VI) à partir de 2 mg/kg.
Les résultats obtenus avec cette méthode sont strictement tributaires des conditions d’extraction. Les résultats obtenus avec d’autres modes opératoires d’extraction (solution d’extraction, pH, durée d’extraction, etc.) ne sont pas comparables aux résultats acquis avec le mode opératoire décrit dans le présent document.

Rastlinski biostimulanti - Določevanje kroma Cr(VI)

Ta dokument podaja metodo za preverjanje, da šestvalentni krom (CrVI) ni prisoten v rastlinskih biostimulantih v koncentraciji, ki presega ustrezne omejitve, določene v Uredbi EU o sredstvih za gnojenje [1].
Dokument se uporablja za vse vrste rastlinskih biostimulantov (trdne in tekoče), ki se uporabljajo v kmetijstvu.
Opisana metoda je primerna za kvantifikacijo vsebnosti kroma (VI) v rastlinskih biostimulantih do vrednosti najmanj 2 mg/kg.
Rezultati te metode so strogo odvisni od pogojev ekstrakcije. Rezultati, pridobljeni z drugimi postopki ekstrakcije (ekstrakcijska raztopina, pH, čas ekstrakcije ipd.) niso primerljivi z rezultati, pridobljeni s postopkom, opisanim v tem dokumentu.

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TS CEN/TS 17703:2023
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Standards Content (Sample)

SIST-TS CEN/TS 17703:2023
Rastlinski biostimulanti - Določevanje kroma Cr(VI)
Plant biostimulants - Determination of chromium(VI)
Pflanzen-Biostimulanzien - Bestimmung von Chrom(VI)
Biostimulants des végétaux - Dosage du chrome(VI)
Ta slovenski standard je istoveten z: CEN/TS 17703:2022
65.080 Gnojila Fertilizers
SIST-TS CEN/TS 17703:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS CEN/TS 17703:2023

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SIST-TS CEN/TS 17703:2023

CEN/TS 17703


March 2022
ICS 07.080
English Version

Plant biostimulants - Determination of chromium(VI)
Biostimulants des végétaux - Dosage du chrome(VI) Biostimulanzien für die pflanzliche Anwendung -
Bestimmung von Chrom (VI)
This Technical Specification (CEN/TS) was approved by CEN on 3 January 2022 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.



CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 17703:2022 E
worldwide for CEN national Members.

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SIST-TS CEN/TS 17703:2023
CEN/TS 17703:2022 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 6
5 Chemicals . 6
6 Apparatus and materials . 7
7 Procedure . 7
7.1 Sampling and preparation of samples. 7
7.2 Preparation of analytical solution . 7
7.3 Chromatographic conditions . 8
7.4 Calibration . 8
7.5 Determination of the recovery rate . 9
8 Calculation and expression of results . 9
8.1 Calculation of chromium(VI) content . 9

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