GB/T 535-2020 Fertilizer grade ammonium sulphate

GB/T 535-1995 Ammonium sulphate

GB/T 6679-2003 General rules for sampling solid chemical products GB/T 6682-1992 Water for analytical laboratory use—Specification and test methods GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB 8569-1997 Packing of solid chemical fertilizers GB/T 8569-2009 Packing of solid chemical fertilizers GB 18382-2001 Fertilizer marking—Presentation and declaration GB 18382-2021 Fertilizer marking—Presentation and declaration GB/T 22923-2008 Determination of nitrogen,phosphorus and potassium for fertilizers by auto analyzer GB/T 24890-2010 Determination of chloride content for compound fertilizers GB/T 29400-2012 Determination of microamount of inorganic anions in fertilizers by ion chromatography GB/T 32952-2016 Determination of polycyclic aromatic hydrocarbons content for fertilizers—Gas chromatography-mass spectrometry method GB/T 32954-2016 Determination of fluoride content for fertilizers—Ion selective electrode method GB 38400-2019 Limitation requirements of toxic and harmful substance in fertilizers HG/T 2843-1997 Fertilizer products commonly used in chemical analysis include standard titration solutions, standard solutions, reagent solutions, and indicator solutions NY/T 1117-2006 Determination of Calcium, Magnesium, and Sulfur Content in Water-soluble Fertilizers NY/T 1117-2010 The determination of calcium, magnesium, sulfur, and chloride content in water-soluble fertilizers NY/T 1978-2022 Determination of Mercury, Arsenic, Cadmium, Lead, Chromium, and Nickel Content in Fertilizers NY/T 1978-2010 Determination of Mercury, Arsenic, Cadmium, Lead, and Chromium Content in Fertilizers NY/T 2542-2014 Determination of Total Nitrogen Content in Fertilizer