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Calcium-carbide - Sieve analysis

90.60   Close of review

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Calcium-carbide - Determination of gas yield

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Calcium-carbide - Determination of phosphine in acetylene

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Calcium-carbide - Determination of hydrogen sulphide in acetylene

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Calcium-carbide - Determination

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Sulphuric acid for industrial use - Determination of manganese content - Photometric method

90.60   Close of review

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Sulphuric acid for industrial use - Determination of manganese content - Flame atomic absorption method

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Sulphuric acid for industrial use - Determination of cooper content - 2,2'-biquinolyl photometric method

90.60   Close of review

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Sulphuric acid for industrial use - Determination of cooper content - Flame atomic absorption method

90.60   Close of review

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Sulphuric acid for industrial use - Determination of permanganate reducing substances content - Volumetric method

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Oleum for industrial use - Determination of suspended substances content - Gravimetric method

90.60   Close of review

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Sulphuric acid for industrial use - Determination of nitro compounds content (as HNO3) - Titrimetric method

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Sulphuric acid and oleum for industrial use - Determination of lead content - Polarographic method

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Sulphuric acid for industrial use - Determination of copper content - Polarographic method

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Hydrogen peroxide for industrial use - Determination of appearance

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Hydrogen peroxide for industrial use - Determination of hydrogen peroxide content - Volumetric method

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Hydrogen peroxide for industrial use - Determination of stability - Volumetric method

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Hydrogen peroxide for industrial use - Determination of free acid content (as H2SO4) - Volumetric method

90.60   Close of review

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