This part of GB/T 6730 specifies the determination of zinc content of iron ores by 1-(2-pyridylazo)-2-naphthoI spectrophotometric method.
This method is applicable to natural iron ores, concentrates, sinters and pellets.The concentration range in mass fraction is from 0.010%-0.500%.
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This part of GB/T 6730 specifies a niobium content testing method by the sulfochlorophenol S spectrophotometric method.
This method is applicable to natural iron ores, concentrates, sinters and pellets. The concentration range in mass fraction is from 0.007% to 0.350%.
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