GB/T 29502-2021 Purple ores

GB/T 29502-2013 Purple ore

GB/T 6730.10-1986 Methods for chemical analysis of iron ores The gralimetric method for the determination of silicon content GB/T 6730.10-2014 Iron ores—Determination of silicon content—Gravimetric methods GB/T 6730.18-1986 Methods for chemical analysis of iron ores The n-butyl acetate extraction-molybdenum blue photometric method for the determination of phosphorus content GB/T 6730.18-2006 Iron ores—Determination of phosphorus content—Molybdenum blue spectrophotometric method GB/T 6730.36-1986 Methods for chemical analysis of iron ores The flame atomic absorption spectrophotometric method for the determination of cupper content GB/T 6730.36-2016 Iron ores—Determination of copper content—Flame atomic absorption spectrometric method GB/T 6730.45-1986 Methods for chemical analysis of iron ores The diethyldithiocar bamic acid Ag salt photometric method for the determination of arsenic content GB/T 6730.45-2006 Iron ores—Determination of arsenic content—Arseno-molybdenum blue spectrophotometric method after hydrogen arsenide separation GB/T 6730.53-2004 Iron ores—Determination of zinc content—Flame atomic absorption spectrometric method GB/T 6730.54-2004 Iron ores—Determination of lead content—Flame atomic absorption spectrometric method GB/T 6730.57-2004 Iron ores—Determination of chromium content—Flame atomic absorption spectrometric method GB/T 6730.61-2005 Iron ores—Determination of carbon and sulfur content—High frequency combustion with infrared absorption method GB/T 6730.61-2022 Iron ores—Determination of carbon and sulfur content—High frequency combustion with infrared absorption method GB/T 6730.65-2009 Iron ores—Determination of total iron content—Titanium(Ⅲ) chloride reduction potassium dichromate titration methods(routine methods) GB/T 6730.81-2020 Iron ores—Determination of multiple trace elements—Inductively coupled plasma mass spectrometric method 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/T 10322.1-2000 Iron ores—Sampling and sample preparation procedures GB/T 10322.1-2014 Iron ores—Sampling and sample preparation procedures GB/T 10322.1-2023 Iron ores—Sampling and sample preparation procedures GB/T 10322.5-2000 Iron ores—Determination of moisture content of a consignment GB/T 10322.5-2016 Iron ores—Determination of the moisture content of a lot GB/T 10322.5-2024 Iron ores—Determination of the moisture content of a lot GB/T 10322.7-2004 Iron ore—Determination of size distribution by sieving GB/T 10322.7-2016 Iron ores and direct reduced iron—Determination of size distribution by sieving GB/T 6730.45-2025 Iron ores—Determination of arsenic content—Arseno-molybdenum blue spectrophotometric method after hydrogen arsenide separation