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ISO 19747:2020

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

Oct 29, 2020

General information

90.93     Apr 11, 2026

ISO

ISO/TC 134

International Standard

65.080  

English  

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Scope

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.

Life cycle

NOW

PUBLISHED
ISO 19747:2020
90.93 Standard confirmed
Apr 11, 2026