What is compound fertilizer?What is compound fertilizer detection standard?


Compound fertilizer material from literal meaning to understand, is refers to the three elements containing at least two kinds of NPK fertilizer, that is to say, contains two elements for binary compound fertilizer, containing three elements for the ternary compound fertilizer, compound fertilizer material according to different concentration can be divided into three kinds, respectively is a low concentration of compound fertilizer, the concentration and high concentration compound fertilizer mixed fertilizer, which contains different classification of different nutrients.Determination of copper, iron, manganese, zinc, boron and molybdenum content in compound fertilizer — Determination of organic-inorganic compound fertilizer — Part 1: Determination of total nitrogen — Determination of organic-inorganic compound fertilizer — Part 2: Determination of copper, iron, manganese, zinc, boron and molybdenum content in compound fertilizerTotal phosphorus content GB/T17767.3-2010 Method for determination of organic-inorganic compound fertilizers part 3:Total potassium content GB/T18877-2020 Organic and inorganic compound fertilizer GB/T19203-2003 Determination of calcium, magnesium and sulfur content in compound fertilizer GB/T22924-2008 Determination of biuret content in compound fertilizer (compound fertilizer) GB/T24890-2010Determination of chlorine ion content in compound fertilizer — Determination of particle size of compound fertilizer — preparation of laboratory samples — Determination of total nitrogen content in compound fertilizer — Titration method after distillation — Determination of chlorine ion content in compound fertilizer — Determination of particle size of compound fertilizer — preparation of laboratory samples — Determination of total nitrogen content in compound fertilizer — Titration method after distillationDetermination of available phosphorus content in compound fertilizer — Determination of potassium content in compound fertilizer — Potassium tetraphenylborate gravimetric method — Determination of free water content in compound fertilizer — Vacuum oven method — Determination of free water content in compound fertilizer — Karl.Inorganic coated compound fertilizer (compound fertilizer) HG/T4217-2011 HG/T5331-2018 Compound fertilizer containing chelated trace elements (compound fertilizer) HG/T5933-2021 Humic acid organic-inorganic compound fertilizer NY/T1376-2007Determination of biuret content in compound fertilizer Ny481-2002 Organic-inorganic compound fertilizer SN/T3372-2012 Determination of lead, cadmium, chromium, nickel, arsenic and mercury in organic-inorganic compound fertilizer Inductively coupled plasma atomic emission spectrometry SN/T3793-2014Compound fertilizer – determination of total phosphorus and potassium content – X-ray fluorescence spectrometry

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