Identification Test of Fertilizer by FTIR: Analysis Conforming to "Identification Methods for Fertilizers (2020)"

Introduction

In Japan, official specifications and application standards for fertilizers are established in the Fertilizer Regulation Act (1) in order “to preserve the quality of fertilizers, etc. and ensure fair trade in fertilizers and their safe application.” Analysis methods for fertilizer, which are important for preserving fertilizer quality, are provided in “Testing Methods for Fertilizers (2020)” and “Identification Methods for Fertilizers (2020).” “Identification Methods for Fertilizers” states that “unlike analysis methods for measuring the components, etc. in fertilizers, identification methods are used in observation of the morphology and estimation of the raw materials used” (2). Applicable identification methods include identification by microscopic observation, detection of fertilizer components by reagents and litmus paper, and identification by X-ray diffraction instruments. In “Identification Methods for Fertilizers (2020),” identification by Fourier transform infrared spectrophotometry (FTIR) was newly added to the applicable methods. Measurement of the infrared spectrum by FTIR can be completed in a short time and does not require complex sample preparation. In this article, measurement of the infrared spectrum and identification testing of a urea-isobutyl aldehyde condensate compound fertilizer were carried out.

November 20, 2020 GMT