GB/T 6150.3-2023 Methods for chemical analysis of tungsten concentrates Part 3: Determination of phosphorus content Phosphomolybdenum yellow spectrophotometry and inductively coupled plasma atomic emission spectrometry (English Version)
2023GB/T 6150.3-2023 Methods for chemical analysis of tungsten concentrates Part 3: Determination of phosphorus content Phosphomolybdenum yellow spectrophotometry and inductively coupled plasma atomic emission spectrometry
2022GB/T 6150.2-2022 Methods for chemical analysis of tungsten concentrates—Part 2: Determination of tin content—Potassium iodate titrimetry and inductively coupled plasma atomic emission spectrometry
2009GB/T 6150.3-2009 Methods for chemical analysis of tungsten concentrates-Determination of phosphotus content-The phosphorus molybdenum yellow spectrophotometry
2008GB/T 6150.2-2008 Methods for chemical analysis of tungsten concentrates.Determination of tin content.The potassium iodate volumetry and hydrogenate atomic absorption spectrometry
1985GB/T 6150.3-1985 Methods for chemical analysis of tungsten concentrates--The salicylfluorone-tetradecyl pyridine chloride photometric method for the determination of tin content