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ISO 904:1976PublishedHydrochloric acid for industrial use — Determination of total acidity — Titrimetric methodInternational Standard · Published 1 Nov 1976 · ISO/TC 47ISO 910:1977PublishedSulphuric acid and oleum for industrial use — Determination of total acidity, and calculation of free sulphur trioxide content of oleum — Titrimetric methodInternational Standard · Published 1 Nov 1977 · ISO/TC 47ISO 2762:1973PublishedHydrochloric acid for industrial use — Determination of soluble sulphates — Turbidimetric methodInternational Standard · Published 1 Nov 1973 · ISO/TC 47ISO 2997:1974PublishedPhosphoric acid for industrial use — Determination of sulphate content — Method by reduction and titrimetryInternational Standard · Published 1 Nov 1974 · ISO/TC 47ISO 3137:1974PublishedAnhydrous hydrogen fluoride for industrial use — SamplingInternational Standard · Published 1 Dec 1974 · ISO/TC 47ISO 3139:1976PublishedAqueous hydrofluoric acid for industrial use — Sampling and methods of testInternational Standard · Published 1 Apr 1976 · ISO/TC 47ISO 3360:1976PublishedPhosphoric acid and sodium phosphates for industrial use (including foodstuffs) — Determination of fluorine content — Alizarin complexone and lanthanum nitrate photometric methodInternational Standard · Published 1 Aug 1976 · ISO/TC 47ISO 3423:1975PublishedSulphuric acid and oleums for industrial use — Determination of sulphur dioxide content — Iodometric methodInternational Standard · Published 1 Nov 1975 · ISO/TC 47ISO 3699:1976PublishedAnhydrous hydrogen fluoride for industrial use — Determination of water content — Karl Fischer methodInternational Standard · Published 1 Aug 1976 · ISO/TC 226ISO 3706:1976PublishedPhosphoric acid for industrial use (including foodstuffs) — Determination of total phosphorus (V) oxide content — Quinoline phosphomolybdate gravimetric methodInternational Standard · Published 1 Nov 1976 · ISO/TC 47ISO 4285:1977PublishedPhosphoric acid for industrial use — Guide to sampling techniquesInternational Standard · Published 1 Dec 1977 · ISO/TC 47ISO/R 847:1968WithdrawnWithdrawal of ISO/R 847-1968Recommendation · Published 1 Oct 1968 · ISO/TC 47ISO 848:1981WithdrawnPhosphoric acid for industrial use — Determination of calcium content — Titrimetric methodInternational Standard · Published 1 Nov 1981 · ISO/TC 47ISO/R 849:1968WithdrawnPhosphoric acid for industrial use — Determination of iron content — 2,2'- Bipyridyl spectrophotometric methodRecommendation · Published 1 Oct 1968 · ISO/TC 47ISO 905:1976WithdrawnHydrochloric acid for industrial use — Evaluation of hydrochloric acid concentration by measurement of densityInternational Standard · Published 1 Nov 1976 · ISO/TC 47ISO 906:1976WithdrawnHydrochloric acid for industrial use — Determination of sulphate content — Barium sulphate gravimetric methodInternational Standard · Published 1 Nov 1976 · ISO/TC 47ISO 907:1976WithdrawnHydrochloric acid for industrial use — Determination of sulphated ash — Gravimetric methodInternational Standard · Published 1 Nov 1976 · ISO/TC 47ISO 908:1980WithdrawnHydrochloric acid for industrial use — Determination of oxidizing or reducing substances content — Titrimetric methodInternational Standard · Published 1 Mar 1980 · ISO/TC 47ISO/R 909:1968WithdrawnHydrochloric acid for industrial use — Determination of iron content — 2,2'- Bipyridyl spectrophotometric methodRecommendation · Published 1 Dec 1968 · ISO/TC 47ISO 911:1977WithdrawnSulphuric acid for industrial use — Evaluation of sulphuric acid concentration by measurement of densityInternational Standard · Published 1 Nov 1977 · ISO/TC 47ISO 913:1977WithdrawnSulphuric acid and oleum for industrial use — Determination of ash — Gravimetric methodInternational Standard · Published 1 Nov 1977 · ISO/TC 47ISO 914:1977WithdrawnSulphuric acid and oleum for industrial use — Determination of total nitrogen content — Titrimetric method after distillationInternational Standard · Published 1 Nov 1977 · ISO/TC 47ISO/R 915:1968WithdrawnSulphuric acid and oleum for industrial use — Determination of iron content — 2,2'- Bipyridyl spectrophotometric methodRecommendation · Published 1 Dec 1968 · ISO/TC 47ISO 1914:1972WithdrawnBoric acid for industrial use — Determination of boric acid content — Volumetric methodInternational Standard · Published 1 May 1972 · ISO/TC 47ISO 1980:1977WithdrawnNitric acid for industrial use — Determination of total acidity — Titrimetric methodInternational Standard · Published 1 Nov 1977 · ISO/TC 47