GB/T 40461-2021 (English Version) PDF

Scope: This document describes methods for the determination of sodium in fertilizers and soil conditioners, including inductively coupled plasma emission spectrometry, flame atomic absorption spectrometry, flame atomic emission spectrometry, and flame photometry. This document applies to the determination of sodium content in fertilizers and soil conditioners. In this document, the detection limit of inductively coupled plasma emission spectrometry is 2 mg/kg, and the limit of quantification is 6 mg/kg; the detection limit of flame atomic absorption spectrometry and flame atomic emission spectrometry is 30 mg/kg, The limit of quantification was 100 mg/kg; the detection limit of flame photometer method was 60 mg/kg, and the limit of quantification was 200 mg/kg.

GB/T 40461-2021 Referenced Document