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    ISO R 849 : 1968

    PHOSPHORIC ACID FOR INDUSTRIAL USE - DETERMINATION OF IRON CONTENT - 2,2 BIPYRIDYL SPECTROPHOTOMETRIC METHOD

    International Organization for Standardization

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    ISO R 852 : 1968

    SODIUM TRIPOLYPHOSPHATE AND SODIUM PYROPHOSPHATE FOR INDUSTRIAL USE - DETERMINATION OF IRON CONTENT - 2,2 BIPYRIDYL SPECTROPHOTOMETRIC METHOD

    International Organization for Standardization

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    ISO 2362 : 1972

    ALUMINIUM FLUORIDE FOR INDUSTRIAL USE - DETERMINATION OF FLUORINE CONTENT - MODIFIED WILLARD WINTER METHOD

    International Organization for Standardization

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    ISO 2365 : 1972

    AMMONIUM NITRATE FOR INDUSTRIAL USE - MEASUREMENT OF PH VALUE - POTENTIOMETRIC METHOD

    International Organization for Standardization

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    ISO 2222 : 1972

    FORMALDEHYDE SOLUTIONS FOR INDUSTRIAL USE - LIMIT TEST FOR INORGANIC SULPHATES

    International Organization for Standardization

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    ISO 2479 : 1972(R2018)

    SODIUM CHLORIDE FOR INDUSTRIAL USE - DETERMINATION OF MATTER INSOLUBLE IN WATER OR IN ACID AND PREPARATION OF PRINCIPAL SOLUTIONS FOR OTHER DETERMINATIONS

    International Organization for Standardization

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    ISO 2228 : 1972

    FORMALDEHYDE SOLUTIONS FOR INDUSTRIAL USE - DETERMINATION OF METHANOL CONTENT

    International Organization for Standardization

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    ISO 2576 : 1972

    CHEMICAL ANALYSIS OF ZINC ALLOYS - POLAROGRAPHIC DETERMINATION OF LEAD AND CADMIUM IN ZINC ALLOYS CONTAINING COPPER

    International Organization for Standardization

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    ISO 2369 : 1972

    ALUMINIUM FLUORIDE FOR INDUSTRIAL USE - DETERMINATION OF SILICA CONTENT - SPECTROPHOTOMETRIC METHOD USING THE REDUCED SILICOMOLYBDIC COMPLEX

    International Organization for Standardization

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    ISO 2216 : 1972

    CRUDE SODIUM BORATES FOR INDUSTRIAL USE - DETERMINATION OF SODIUM OXIDE AND BORIC OXIDE CONTENTS - VOLUMETRIC METHOD

    International Organization for Standardization

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