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GB/T 45891-2025 Active
GB/T 45891-2025 Fertilizers and soil conditioners—Determination of humic and hydrophobic fulvic acids concentrations in fertilizer materials
Abstract
This document describes the determination methods for humic acid and hydrophobic fulvic acid.
This document is applicable to the determination of the content of humic acid and hydrophobic fulvic acid in solid and liquid raw materials of commercial fertilizers, soil conditioners, and geological sediments.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 45891-2025 |
| CCS | Fertilizers and pesticides |
| ICS | Fertilizer |
| Implement Date | 2026-01-01 |
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