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搜索结果: 77 个产品, 第 1 页, 共 3 页
标准编号 标准名称 状态 发布日期
ISO 3139:1976/Amd 1:1980 EN Aqueous hydrofluoric acid for industrial use — Sampling and methods of test 现行 暂无
ISO 739:1976 EN Sodium carbonate for industrial use — Preparation and storage of test samples 现行 暂无
ISO 740:1976 EN Sodium carbonate for industrial use — Determination of total soluble alkalinity — Titrimetric method 现行 暂无
ISO 746:1976 EN Sodium carbonate for industrial use — Determination of matter insoluble in water at 50 degrees C 现行 暂无
ISO 904:1976 EN Hydrochloric acid for industrial use — Determination of total acidity — Titrimetric method 现行 暂无
ISO 910:1977 EN Sulphuric acid and oleum for industrial use — Determination of total acidity, and calculation of free sulphur trioxide content of oleum — Titrimetric method 现行 暂无
ISO 979:1974 EN Sodium hydroxide for industrial use — Method of assay 现行 暂无
ISO 981:1973 EN Sodium hydroxide for industrial use — Determination of chloride content — Mercurimetric method 现行 暂无
ISO 1552:1976 EN Liquid chlorine for industrial use — Method of sampling (for determining only the volumetric chlorine content) 现行 暂无
ISO 1619:1976 EN Cryolite, natural and artificial — Preparation and storage of test samples 现行 暂无
ISO 1620:1976 EN Cryolite, natural and artificial — Determination of silica content — Reduced molybdosilicate spectrophotometric method 现行 暂无
ISO 1686:1976 EN Sodium and potassium silicates for industrial use — Samples and methods of test — General 现行 暂无
ISO 1689:1976 EN Sodium and potassium silicates for industrial use — Calculation of the ratio : silicon dioxide/sodium oxide or silicon dioxide/potassium oxide 现行 暂无
ISO 1690:1976 EN Sodium and potassium silicates for industrial use — Determination of silica content — Gravimetric method by insolubilization 现行 暂无
ISO 1691:1976 EN Sodium and potassium silicates for industrial use — Determination of carbonates content — Gas-volumetric method 现行 暂无
ISO 1692:1976 EN Sodium and potassium silicates for industrial use — Determination of total alkalinity — Titrimetric method 现行 暂无
ISO 1693:1976 EN Cryolite, natural and artificial — Determination of fluorine content — Modified Willard-Winter method 现行 暂无
ISO 1694:1976 EN Cryolite, natural and artificial — Determination of iron content — 1,10- Phenanthroline photometric method 现行 暂无
ISO 2120:1972 EN Liquid chlorine for industrial use — Determination of the content of chlorine by volume in the vaporized product 现行 暂无
ISO 2121:1972 EN Liquid chlorine for industrial use — Determination of water content — Gravimetric method 现行 暂无
ISO 2122:1972 EN Sodium and potassium silicates for industrial use — Preparation of solution of products not easily soluble in boiling water and determination of matter insoluble in water 现行 暂无
ISO 2197:1972 EN Sodium hydrogen carbonate for industrial use — List of methods of test and preparation of the test sample 现行 暂无
ISO 2199:1972 EN Sodium hydrogen carbonate for industrial use — Determination of sodium hydrogen carbonate content — Titrimetric method 现行 暂无
ISO 2366:1974 EN Cryolite, natural and artificial — Determination of sodium content — Flame emission and atomic absorption spectrophotometric methods 现行 暂无
ISO 2367:1972 EN Cryolite (natural and artificial) — Determination of aluminium content — 8- Hydroxyquinoline gravimetric method 现行 暂无
ISO 2460:1973 EN Sodium hydrogen carbonate for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method 现行 暂无
ISO 2461:1973 EN Sodium chlorate for industrial use — Determination of matter insoluble in water 现行 暂无
ISO 2462:1973 EN Sodium chlorate for industrial use — Determination of moisture content — Gravimetric method 现行 暂无
ISO 2463:1973 EN Sodium chlorate for industrial use — Determination of chloride content — Mercurimetric method 现行 暂无
ISO 2466:1973 EN Potassium hydroxide for industrial use — Sampling — Test sample — Preparation of the main solution for carrying out certain determinations 现行 暂无
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