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ISO 1981:1977WithdrawnNitric acid for industrial use — Determination of nitrous compounds — Titrimetric methodISO/R 1982:1971WithdrawnNitric acid for industrial use — Determination of iron content — 2,2'- Bipyridyl photometric methodISO 1983:1977WithdrawnNitric acid for industrial use — Determination of sulphated ash — Gravimetric methodISO 2363:1972WithdrawnSulphuric acid and oleums for industrial use — Determination of oxides of nitrogen — 2,4- Xylenol spectrophotometric methodISO 2717:1973WithdrawnSulphuric acid and oleum for industrial use — Determination of lead content — Dithizone photometric methodISO 2877:1974WithdrawnSulphuric acid for industrial use — Determination of chlorides content — Potentiometric methodISO 2899:1974WithdrawnSulphuric acid and oleums for industrial use — Determination of ammoniacal nitrogen content — Spectrophotometric methodISO 2990:1974WithdrawnNitric acid for industrial use — Evaluation of the nitric acid concentration by measurement of densityISO 2991:1974WithdrawnNitric acid for industrial use — Determination of ammoniacal nitrogen content — Spectrophotometric methodISO 3138:1974WithdrawnAnhydrous hydrogen fluoride for industrial use — Determination of non-volatile acid content — Titrimetric methodISO 3328:1975WithdrawnNitric acid for industrial use — Determination of sulphate content — Method by reduction and titrimetryISO 3359:1975WithdrawnPhosphoric acid for industrial use — Determination of arsenic content — Silver diethyldithiocarbamate photometric methodISO 3361:1975WithdrawnPhosphoric acid for industrial use — Determination of soluble silica content — Reduced molybdosilicate spectrophotometric methodISO 3693:1977WithdrawnNitric acid for industrial use — Determination of chloride ions content — Potentiometric methodISO 3700:1980WithdrawnAnhydrous hydrogen fluoride for industrial use — Determination of water content — Conductimetric methodISO 3701:1976WithdrawnAnhydrous hydrogen fluoride for industrial use — Determination of hexafluorosilicic acid content — Reduced molybdosilicate photometric methodISO 3702:1976WithdrawnAnhydrous hydrogen fluoride for industrial use — Determination of sulphur dioxide content — Iodometric methodISO 3707:1976WithdrawnPhosphoric acid for industrial use (including foodstuffs) — Determination of calcium content — Flame atomic absorption methodISO 3708:1976WithdrawnPhosphoric acid for industrial use (including foodstuffs) — Determination of chloride content — Potentiometric methodISO 3709:1976WithdrawnPhosphoric acid for industrial use (including foodstuffs) — Determination of oxides of nitrogen content — 3,4- Xylenol spectrophotometric methodISO 5785:1978WithdrawnHydrochloric acid for industrial use — Determination of arsenic content — Silver diethyldithiocarbamate photometric methodISO 5792:1978WithdrawnSulphuric acid for industrial use — Determination of arsenic content — Silver diethyldithiocarbamate photometric methodISO 6677:1983WithdrawnHexafluorosilicic acid for industrial use — Determination of available fluorine content — Potentiometric method after distillationISO 6678:1981WithdrawnPhosphoric acid for industrial use — Determination of lead content — Atomic absorption spectrometric methodISO 7058:1983WithdrawnPhosphoric acid for industrial use — Determination of higher soluble sulfate contents — Titrimetric method after reduction