YS/T 240.4-2007 Methods for chemical analysis of bismuth concentrate—Determination of tungsten trioxide content—Thiocyanate spectrophotometric method

YS/T 240.1-2007 Methods for chemical analysis of bismuth concentrate—Determination of bismuth content—Na2EDTA titrimetric method YS/T 240.2-2007 Methods for chemical analysis of bismuth concentrate—Determination of lead content—Na2EDTA titrimetric method and flame atomic absorption spectrometric method YS/T 240.3-2007 Methods for chemical analysis of bismuth concentrate—Determination of silicon dioxide content—Molybdenum blue spectrophotometric method and gravimetric method YS/T 240.5-2007 Methods for chemical analysis of bismuth concentrate—Determination of molybdenum content—Thiocyanate spectrophotometric method YS/T 240.6-2007 Methods for chemical analysis of bismuth concentrate—Determination of iron content—Potassium bichromate titrimetric method YS/T 240.7-2007 Methods for chemical analysis of bismuth concentrate—Determination of sulfur content—Combustion-neutralization titrimetric method YS/T 240.8-2007 Methods for chemical analysis of bismuth concentrate—Determination of arsenic content—DDTC-Ag spectrophotometric method and the extraction-iodometric method YS/T 240.9-2007 Methods for chemical analysis of bismuth concentrate—Determination of lead content—Iodometric method and the flame atomic absorption spectrometric method YS/T 240.10-2007 Methods for chemical analysis of bismuth concentrate—Determination of aluminium oxide content—Chromazurol S spectrophotometric method YS/T 240.11-2007 Methods for chemical analysis of bismuth concentrate—Determination of silver content—Flame atomic absorption spectrometric method

YS/T 240.4-1994