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BS ISO 19747:2020

BS ISO 19747:2020

$102.76

Fertilizers and soil conditioners. Determination of monosilicic acid concentrations in nonliquid fertilizer materials

Published By Publication Date Number of Pages
BSI 2020 18
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This document establishes a method for the determination of monosilicic acid concentrations in nonliquid fertilizer materials. Monosilicic acid is reported as silicon (Si).

This extraction method is applicable to the detection of monosilicic acid in nonliquid fertilizer products, blended products, and beneficial substances at silicon (Si) concentrations of 2 to 84 g/kg, with a limit of detection (LOD) of 0,6 g/kg Si, and a limit of quantification (LOQ) of 2 g/kg correlating well with plant uptake.

This method is not applicable to liquid silicon fertilizer sources due to an expected low bias of Si recovery and low correlation with plant uptake.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative References
3 Terms and Definitions
4 Principle
5 Safety
10 6 Reagents
11 7 Calibration standards
8 Apparatus
12 8.5 Shakers.
8.5.2 Orbital platform shaker or wrist-action shaker.
13 9 Procedure
9.1 Sample preparation
9.1.1 Dry control test portions (e.g. Talc, Wollastonite) for 2 h at 105 ± 5 °C. All other fertilizer materials need not be dried and should be processed on an as-is moisture basis.
9.2 Extraction
9.3 Heteropoly blue analyses
9.4 Manual spectrophotometer analyses
14 9.5 Calculations
9.6 Precision
9.7 Statistical analysis
9.8 Ring study
15 Annex A (Informative) Report of the international laboratories ring study
16 Bibliography

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BS ISO 19747:2020
$102.76