ISO 19822-2018 PDF
Name in English:
St ISO 19822-2018
Name in Russian:
Ст ISO 19822-2018
Original standard ISO 19822-2018 in PDF full version. Additional info + preview on request
Full title and description
ISO 19822:2018 — Fertilizers and soil conditioners — Determination of humic and hydrophobic fulvic acids concentrations in fertilizer materials. This international standard specifies a laboratory procedure to quantify humic acids and the hydrophobic fraction of fulvic acids in dry and liquid materials used as ingredients in commercial fertilizers, soil amendments and related geological deposits.
Abstract
This document specifies the procedure for the analysis of humic acids and hydrophobic fulvic acids which is applicable to dry and liquid materials used as ingredients in commercial fertilizers, soil amendments, and geological deposits. The method provides an ash‑free determination and includes steps for extraction, fractionation and selective separation of hydrophobic fulvic material.
General information
- Status: Published
- Publication date: August 2018
- Publisher: International Organization for Standardization (ISO)
- ICS / categories: 65.080 — Fertilizers
- Edition / version: Edition 1 (2018)
- Number of pages: 16
Scope
ISO 19822:2018 applies to the laboratory determination of humic acids and hydrophobic fulvic acids concentrations in materials intended for use in fertilizers and soil conditioners. The scope covers both solid (dry) and liquid matrices used as ingredients or amendments, and describes sample preparation, chemical extraction, separation of humic and hydrophobic fulvic fractions (using selective adsorption techniques), gravimetric/ash‑free quantification and reporting of results. The standard is intended for routine quality control and comparative testing rather than exhaustive characterisation of all fulvic fractions.
Key topics and requirements
- Sample preparation and representative sampling for dry and liquid fertilizer materials.
- Alkali extraction of humic substances followed by controlled fractionation.
- Selective separation of hydrophobic fulvic acids (resin adsorption approach, e.g., DAX‑type resins, as described in the method).
- Ash‑free gravimetric determination of humic fractions (correction for inorganic residue/ash).
- Method validation elements: repeatability, reproducibility and interlaboratory considerations.
- Limitations and pre‑screening recommendations (for example, interference from lignosulfonates and other non‑humic co‑extractives).
- Reporting format and units for concentrations appropriate to fertilizer labelling and quality control.
Typical use and users
Primary users include fertilizer and soil amendment manufacturers (product specification and QC), commercial and contract testing laboratories (routine and regulatory testing), agricultural research laboratories (comparative studies of humic materials), and regulatory bodies or procurement specialists needing standardized, comparable measurements of humic and hydrophobic fulvic fractions in products and raw materials.
Related standards
Standards commonly referenced together with ISO 19822:2018 include laboratory competence and quality standards (ISO/IEC 17025), and other ISO methods for fertilizer and soil testing such as ISO 22018 (EDTA‑soluble phosphorus in inorganic fertilizers), ISO 10694 (soil organic and total carbon), ISO 10390 (soil pH) and various ISO/TC 134 fertilizer specifications and test methods. Guidance and reference procedures from the International Humic Substances Society (IHSS) and published interlaboratory study material are also relevant for method context and comparison.
Keywords
ISO 19822:2018; humic acids; hydrophobic fulvic acids; fertilizers; soil conditioners; determination method; extraction; DAX resin; ash‑free gravimetric; laboratory quality control; ISO/TC 134.
FAQ
Q: What is this standard?
A: ISO 19822:2018 is an ISO international standard that defines a laboratory method to determine humic acids and hydrophobic fulvic acids concentrations in materials used in fertilizers and soil conditioners.
Q: What does it cover?
A: It covers sample preparation, chemical extraction and fractionation, selective separation of hydrophobic fulvic acids (resin adsorption approaches), ash‑free gravimetric determination, method limitations and recommendations for reporting results for both dry and liquid fertilizer materials.
Q: Who typically uses it?
A: Fertilizer manufacturers, contract and regulatory testing laboratories, agricultural researchers, and regulators or purchasers who require standardized, comparable measurements of humic and fulvic fractions in products and raw materials.
Q: Is it current or superseded?
A: The published edition is from August 2018 (Edition 1). It remains the published international standard; ISO metadata shows the document was scheduled for systematic review in the ISO review cycle (review activity around 2025). Users should check with their national standards body or ISO catalogue for any amendments or a subsequent revised edition after the review.
Q: Is it part of a series?
A: ISO 19822:2018 is one of several ISO/TC 134 (Fertilizers, soil conditioners and beneficial substances) test methods and specifications. It is commonly used alongside other fertilizer and soil test standards (for example ISO 22018, ISO 10694, ISO 10390) and should be implemented within laboratory systems consistent with ISO/IEC 17025.
Q: What are the key keywords?
A: Humic acids, hydrophobic fulvic acids, fertilizers, soil conditioners, DAX resin, extraction, ash‑free gravimetric, ISO 19822:2018, laboratory method, quality control.