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BS EN 15749:2022

BS EN 15749:2022

$142.49

Fertilizers. Determination of sulfates content using three different methods

Published By Publication Date Number of Pages
BSI 2022 32
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This document specifies three different methods (Methods A, B and C) for the determination of sulfur present in fertilizer extracts in the form of sulfates. Method A specifies the gravimetric method. Method B specifies the method using inductively coupled plasma optical spectrometry (ICP-OES). Method C specifies the method using ion chromatography (IC).

PDF Catalog

PDF Pages PDF Title
2 undefined
7 1 Scope
2 Normative references
3 Terms and definitions
4 Principle
4.1 Method A: Gravimetric method
4.2 Method B: ICP-OES
8 4.3 Method C: IC
5 Sampling and sample preparation
6 Method A – Gravimetric method
6.1 Reagents
6.2 Apparatus
6.3 Procedure
6.3.1 Sampling of the solution
6.3.2 Preparation of the precipitate
9 6.3.3 Incineration and weighing of the precipitate
6.4 Calculation and expression of the result
7 Method B – ICP-OES method
7.1 Reagents
10 7.2 Apparatus
7.3 Preparation of the extract
7.4 Procedure
7.4.1 General
7.4.2 Preparation of the test solution
7.4.3 Preparation of the blank test solution
11 7.4.4 Preparation of the calibration solutions
7.5 Determination
7.5.1 General
7.5.2 Determination by ICP-OES
12 7.6 Calculation and expression of the results
7.6.1 Calculation
13 7.6.2 Expression of the sulfur content in the sample
8 Method C – IC method
8.1 Reagents
14 8.2 Apparatus
15 8.3 Sampling and sample preparation (EN 1482-1)
8.4 Procedure
8.4.1 Preparation of the test solution
8.4.2 Preparation of the calibration solutions
8.4.2.1 Calibration by standard addition
8.4.2.2 External calibration
16 8.4.3 Determination
8.4.3.1 General
8.4.3.2 Determination by ion chromatography (IC)
8.4.3.3 Procedure
8.4.3.4 Calibration
8.4.3.5 Measurement
17 8.4.3.6 Validity check of the calibration function
8.5 Expression of the results
8.5.1 Calculation of results using standard addition technique
18 8.5.2 Calculation of results using external calibration
19 9 Precision of methods A, B and C
9.1 Inter-laboratory tests
9.2 Repeatability
9.3 Reproducibility
21 10 Test report
22 Annex A (informative)Statistical results of the inter-laboratory tests
25 Annex B (informative)Statistical results of the inter-laboratory tests of VDLUFA
28 Annex C (informative)Statistical results of the inter-laboratory tests of Spanish Proficiency Testing Program

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BS EN 15749:2022
$142.49