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BSI PD CEN/TS 17701-3:2022

BSI PD CEN/TS 17701-3:2022

$102.76

Plant biostimulants. Determination of specific elements – Determination of mercury

Published By Publication Date Number of Pages
BSI 2022 16
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This document specifies a method for determination of the content of mercury (Hg) in plant biostimulants using (cold) vapour generation apparatus coupled to an atomic absorption spectrophotometer and a method using a direct amalgamation technique. It is applicable to aqua regia digests prepared according to CEN/TS 17701-1. NOTE It is also possible to use other suitable methods for the determination of mercury described in Annex A if users prove that the method gives the same results as the methods described in this document. This document is also applicable to the blends of fertilizing products where plant biostimulants are the main part of the blend. Otherwise, the Technical Specification for the main part of the blend applies.

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
4.1 Vapour generation atomic absorption spectrophotometry (VG-AAS)
4.2 Direct amalgamation (DA)
5 Interferences
5.1 Vapour generation atomic absorption spectrophotometry (VG-AAS)
8 5.2 Direct amalgamation (DA)
6 Reagents
6.5 Mixed acid solution of 0,8 mol/l nitric acid and 1,8 mol/l hydrochloric acid
6.6 Reducing agents
9 7 Apparatus
7.1 Common laboratory glassware.
7.3 Vapour generation system
8 Procedure
8.1 Preparation of the test and blank solutions
10 8.2 Preparation of the calibration solutions
8.3 Measurement
8.3.1 Instrument conditions
8.3.2 Matrix effects
8.3.3 Spiking
11 8.3.4 Measurement by VG-AAS
8.3.5 Measurement by DA
9 Calculation and expression of the results
9.1 Content of mercury
12 10 Test report
13 Annex A (informative) Methods for mercury determination
15 Bibliography

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BSI PD CEN/TS 17701-3:2022
$102.76