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BSI PD CEN/TS 17703:2022

BSI PD CEN/TS 17703:2022

$102.76

Plant biostimulants. Determination of chromium(VI)

Published By Publication Date Number of Pages
BSI 2022 20
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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.

PDF Catalog

PDF Pages PDF Title
2 National foreword
5 European foreword
6 Introduction
7 1 Scope
2 Normative references
3 Terms and definitions
4 Principle
8 5 Chemicals
5.1 Extraction solution
5.2 Phosphoric acid solution
5.4 Chromium(VI) stock solution
5.5 Chromium(VI) standard solution
5.6 Argon or nitrogen, oxygen-free
9 6 Apparatus and materials
6.11 Suitable vials for HPLC.
7 Procedure
7.1 Sampling and preparation of samples
7.2 Preparation of analytical solution
10 7.3 Chromatographic conditions
7.4 Calibration
11 7.5 Determination of the recovery rate
8 Calculation and expression of results
8.1 Calculation of chromium(VI) content
12 8.2 Recovery rate (according to 7.5)
8.3 Expression of results
9 Test report
13 Annex A (informative) Chromatographic conditions for direct detection method
15 Annex B (informative) Chromatographic conditions for method with post-column reaction
18 Bibliography

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BSI PD CEN/TS 17703:2022
$102.76