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<p>ISO 19746:2017 specifies the test procedure for determining the urea content in urea-based fertilizers, including urea, urea aldehydes [methylene urea fertilizers, isobutylene diurea (IBDU), crotonylidene diurea (CDU)], urea triazone fertilizers, urea ammonium nitrate (UAN), sulfur- and polymer-coated urea (SCU and PCU), as well as compound fertilizers containing urea. The method is based on High Performance Liquid Chromatography (HPLC).</p>
<p>The proposed method is an extension of the AOAC Official Method 2003.14 which was collaboratively studied for the "Determination of Urea in Water-Soluble Urea-Formaldehyde Fertilizer Products and in Aqueous Urea Solutions" in 2003. The method was published in the Journal of AOAC in 2004<sup>[</sup><sup>4</sup><sup>] </sup>and was granted the First Action in 2003 and the Final Action in 2008.</p>
<p>This method also applies to the determination of biuret content in urea containing fertilizer with the results published in the J. AOAC in 2014<sup>[</sup><sup>5</sup><sup>]</sup>. This method was adopted by the International Organization for Standardization (ISO) as a Committee Draft (ISO/CD 18643) in 2014, and after review and the Ring Test Analyses<sup>[</sup><sup>6</sup><sup>]</sup>.</p>
Reģistrācijas numurs (WIID)
66223
Darbības sfēra
<p>ISO 19746:2017 specifies the test procedure for determining the urea content in urea-based fertilizers, including urea, urea aldehydes [methylene urea fertilizers, isobutylene diurea (IBDU), crotonylidene diurea (CDU)], urea triazone fertilizers, urea ammonium nitrate (UAN), sulfur- and polymer-coated urea (SCU and PCU), as well as compound fertilizers containing urea. The method is based on High Performance Liquid Chromatography (HPLC).</p>
<p>The proposed method is an extension of the AOAC Official Method 2003.14 which was collaboratively studied for the "Determination of Urea in Water-Soluble Urea-Formaldehyde Fertilizer Products and in Aqueous Urea Solutions" in 2003. The method was published in the Journal of AOAC in 2004<sup>[</sup><sup>4</sup><sup>] </sup>and was granted the First Action in 2003 and the Final Action in 2008.</p>
<p>This method also applies to the determination of biuret content in urea containing fertilizer with the results published in the J. AOAC in 2014<sup>[</sup><sup>5</sup><sup>]</sup>. This method was adopted by the International Organization for Standardization (ISO) as a Committee Draft (ISO/CD 18643) in 2014, and after review and the Ring Test Analyses<sup>[</sup><sup>6</sup><sup>]</sup>.</p>
