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Sodium tripolyphosphate and sodium pyrophosphate for industrial use — Determination of total phosphorus(V) oxide content — Quinoline phosphomolybdate gravimetric method
90.93 Standard confirmed
Phosphoric acid and sodium phosphates for industrial use (including foodstuffs) — Determination of fluorine content — Alizarin complexone and lanthanum nitrate photometric method
90.93 Standard confirmed
Fluorochlorinated hydrocarbons for industrial use — Determination of acidity — Titrimetric method
90.93 Standard confirmed
Sulphuric acid and oleums for industrial use — Determination of sulphur dioxide content — Iodometric method
90.93 Standard confirmed
Sulphur for industrial use — Determination of ash at 850-900 degrees C and of residue at 200 degrees C
90.93 Standard confirmed
Sulphur for industrial use — Determination of loss in mass at 80 degrees C
90.93 Standard confirmed
Gaseous halogenated hydrocarbons (liquefied gases) — Taking of a sample
90.93 Standard confirmed
Water for analytical laboratory use — Specification and test methods
90.93 Standard confirmed
Sulphur for industrial use — Determination of acidity — Titrimetric method
90.93 Standard confirmed
Sulphur for industrial use — Determination of arsenic content — Silver diethyldithiocarbamate photometric method
90.93 Standard confirmed
Phosphoric acid for industrial use (including foodstuffs) — Determination of total phosphorus (V) oxide content — Quinoline phosphomolybdate gravimetric method
90.93 Standard confirmed
Sodium hexafluorosilicate for industrial use — Determination of free acidity and total hexafluorosilicate content — Titrimetric method
90.93 Standard confirmed
Phosphoric acid for industrial use — Guide to sampling techniques
90.93 Standard confirmed
Aromatic hydrocarbons — Determination of sulphur content — Pitt-Ruprecht reduction and spectrophotometric method
90.93 Standard confirmed
Sodium hexafluorosilicate for industrial use — Determination of phosphate content — Molybdovanadate spectrophotometric method
90.93 Standard confirmed
Sodium fluorosilicate for industrial use — Determination of loss in mass at 105 degrees C
90.93 Standard confirmed