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BS EN 15749:2022 – TC

BS EN 15749:2022 – TC

$186.33

Tracked Changes. Fertilizers. Determination of sulfates content using three different methods

Published By Publication Date Number of Pages
BSI 2022 74
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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
1 30463541
43 A-30400089
44 undefined
49 1 Scope
2 Normative references
3 Terms and definitions
4 Principle
4.1 Method A: Gravimetric method
4.2 Method B: ICP-OES
50 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
51 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
52 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
53 7.4.4 Preparation of the calibration solutions
7.5 Determination
7.5.1 General
7.5.2 Determination by ICP-OES
54 7.6 Calculation and expression of the results
7.6.1 Calculation
55 7.6.2 Expression of the sulfur content in the sample
8 Method C – IC method
8.1 Reagents
56 8.2 Apparatus
57 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
58 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
59 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
60 8.5.2 Calculation of results using external calibration
61 9 Precision of methods A, B and C
9.1 Inter-laboratory tests
9.2 Repeatability
9.3 Reproducibility
63 10 Test report
64 Annex A (informative)Statistical results of the inter-laboratory tests
67 Annex B (informative)Statistical results of the inter-laboratory tests of VDLUFA
70 Annex C (informative)Statistical results of the inter-laboratory tests of Spanish Proficiency Testing Program

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BS EN 15749:2022 - TC
$186.33