ISO 22887:2020
Determination of total sulfur in fertilizers by high temperature combustion
This document specifies a method to measure the total sulfur content in fertilizer and soil conditioner materials.
This method is applicable for measuring total sulfur concentration in solid and liquid fertilizers and its raw inputs in the range of 0,1 % to 97 %.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus, material and reagents
5.1 General
5.2 Apparatus
5.2.1 Apparatus A: Combustion followed by thermal conductivity detection
5.2.2 Apparatus B: Combustion followed by single-range infrared detection
5.3 Materials, reagents and consumables
5.3.1 Materials
5.3.2 Reagents
5.3.3 Consumables
6 Calibration curve and daily factor
7 Preparation of test samples (analytical samples)
7.1 Liquid fertilizers
7.2 Solid fertilizers
8 Determination
9 Calculations and quality control
9.1 Calculations
9.2 Quality control
Annex A (informative) Ring-test
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus, material and reagents
5.1 General
5.2 Apparatus
5.2.1 Apparatus A: Combustion followed by thermal conductivity detection
5.2.2 Apparatus B: Combustion followed by single-range infrared detection
5.3 Materials, reagents and consumables
5.3.1 Materials
5.3.2 Reagents
5.3.3 Consumables
6 Calibration curve and daily factor
7 Preparation of test samples (analytical samples)
7.1 Liquid fertilizers
7.2 Solid fertilizers
8 Determination
9 Calculations and quality control
9.1 Calculations
9.2 Quality control
Annex A (informative) Ring-test
Bibliography