Ferroniobium—Determination of sulfur content—Combustion-iodate titrimetric method,methylene blue photometric method and infrared absorption method
冶金工业信息标准研究院
本部分规定了用碘量法、次甲基蓝光度法和红外线吸收法测定铌铁中硫的含量。
本部分适用于铌铁中硫含量的测定。碘量法的测定范围（质量分数）：0.035%～0.090%；次甲基蓝光度法的测定范围（质量分数）：0.005 0%～0.035%；红外线吸收法的测定范围（质量分数）：0.005 0%～0.090%。
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