ISO 19822:2018 PDF
Fertilizers and soil conditioners — Determination of humic and hydrophobic fulvic acids concentrations in fertilizer materials
Fertilizers and soil conditioners — Determination of humic and hydrophobic fulvic acids concentrations in fertilizer materials
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 16
- Дата публикации:
- 10 августа 2018 г.
- Издание:
- ISO IS 19822 edition 1 version 1
- ICS:
- 65.080
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.
Abstract
Overview
ISO 19822:2018 specifies a laboratory method for the determination of humic acids (HA) and hydrophobic fulvic acids (HFA) in dry and liquid materials used in commercial fertilizers, soil conditioners, and geological deposits. The procedure adapts classical and IHSS preparative extraction techniques into a quantitative, ash‑free gravimetric method using alkali extraction under anoxic conditions, acid precipitation of HA, and selective adsorption of HFA onto a methacrylic‑ester (DAX‑8 type) resin at pH 1.
Key topics and technical requirements
- Scope & definitions: Clear definitions for humic substance, humic acids (HA), fulvic fraction, and hydrophobic fulvic acids (HFA). HFA are defined by elemental sulfur content (
Технические детали
- Технический комитет
- ISO/TC 134 - Fertilizers, soil conditioners and beneficial substances
- SKU
- ISO 19822:2018
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