GB/T 8574-2024: Determination of potassium content for compound fertilizers

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Scope

This document describes the determination of potassium in compound fertilizers using the
potassium tetraphenylborate gravimetric method, inductively coupled plasma atomic emission
spectrometry, or flow analyzer method, through either heating and boiling extraction or
ultrasonic extraction. For the heating and boiling extraction, the potassium tetraphenylborate
gravimetric method is the arbitration method.
This document applies to the determination of potassium content in compound fertilizers. The
determination of potassium content in other potassium-containing inorganic fertilizers may take
this document as a reference.

Basic Data

Standard ID	GB/T 8574-2024 (GB/T8574-2024)
Description (Translated English)	Determination of potassium content for compound fertilizers
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G20
Classification of International Standard	65.080
Word Count Estimation	10,135
Date of Issue	2024-09-29
Date of Implementation	2025-04-01
Older Standard (superseded by this standard)	GB/T 8574-2010
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration