Sulphuric acid and oleums for industrial use — Determination of ammoniacal nitrogen content — Spectr...
Applicable to products having contents of more than 0.0001 % (m/m). The procedure described is suitable for contents between 0.0001 % (m/m) and 0.0005 % (m/m). It bases on distillation, with entrainment by steam, of the ammonia in the presence of an excess of sodium hydroxide and collection of the distillate in an excess of acid solution. Neutralization of the dexcess of acid and formation of the…
Milling cutters mounted on centring arbors having a 7/24 taper — Fitting dimensions — Centring arbor...
Applies both to cutters with inserted teeth, made from high speed steel or with brazed carbide tips, and to cutters equipped with indexable carbide tips. Concerns milling cutters, arbor located, to be used with a well-defined spindle nose having a 7/24 taper and milling cutter, arbor located, to be used bith spindle nose No. 50 and spindle nose No. 60 having a 7/24 taper. The general fitting…
Milling cutters mounted on centring arbors having a 7/24 taper — Inserted tooth cutters
These cutters are equipped either with high speed steel inserted teeth or with inserted teeth with brazed carbide tips. Concerns milling cutters, arbor located, to be used with a well-defined spindle nose having a 7/24 taper and milling cutter, arbor located, to be used with both spindle nose No. 50 and spindle nose No. 60 having a 7/24 taper. Dimensions for centring arbors and fitting dimensions…
Nitric acid for industrial use — Evaluation of the nitric acid concentration by measurement of densi...
Describes the determination of density at 20 °C by means of a hydrometer. The correspondence between density and concentration of aqueous solutions is given in a table. Has also been approved by the IUPAC.
Nitric acid for industrial use — Determination of ammoniacal nitrogen content — Spectrophotometric m...
Applicable to products containing more than 0.0001 % (m/m) of ammoniacal nitrogen. The procedure described is siutable for contents between 0.0001 % (m/m) and 0.0005 % (m/m). The principle of the analysis consists in distillation, with entrainment by steam, of the ammonia in the presence of an excess of sodium hydroxide and collection of the distillate in an excess of acid solution.…
