Method for the Determination of Particulate Mass Flows in Enclosed Gas Streams
1.1 Scope
1.1.1 This Standard describes test procedures and equipment which will permit accurate and reproducible determination of the particulate mass flows in enclosed gas streams. It is intended for use both before and after gas cleaning equipment (performance testing) or prior to emission of the gas stream into t he atmosphere. Note. It is recommended that the testing procedures in…
Urea for industrial use — Determination of biuret content — Flame atomic absorption and photometric ...
Applicable to products having contents of equal to or more than 0.05 % (m/m) (with flame atomic absorption) or 0.1 % (m/m) (with fotometric absorption). Covers the formation of a complex between biuret and copper(II) sulphate in alkaline medium. Fixation of this complex on an anion exchange resin. Elution of Cu first with a potassium nitrate solution and then with a nitric acid solution. Flame…
Oilseed residues — Determination of moisture and volatile matter content
The method consists in drying of a test portion at 103 + 2 C in an oven at atmosphere pressure, until practically constant mass is reached. It applies to residues ( excluding compounded products) obtained by the extraction by pressure or solvent. It cancels and replaces ISO Recommendation R 771-1968.
Aluminium oxide primarily used for the production of aluminium — Determination of titanium content —...
Applicable to all products having a titanium dioxide content of equal to or more than 0.001 % (m/m). Describes the preparation of the diantipyrylmethane solution and the preparation of the titanum standard solution. The procedure of the preparation of a principal solution or the chemical analysis by an alkaline fusion is carried out according to ISO 804 replacing the nitric acid solution by the…
Plastics — Phenol-formaldehyde mouldings — Determination of free ammonia and ammonium compounds — Co...
Specification of a semi-quantitative method. The content of free ammonia in a moulded article is of importance, when corrosion of metal inserts or contamination in contact with the article has to be considered. Distillation of the aqueous extract from a powdered test portion, coloration of the distillate by reaction with Nessler reagent and comparison of the colour with that of standard matching…
Magnesium and its alloys — Determination of nickel — Photometric method using dimethylglyoxime
The method is applicable to the determination of nickel contents between 0,000 5 and 0,05 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Washing powders — Determination of active oxygen content — Titrimetric method
The determination consists in co-reduction, with liberation of oxygen, of the peroxyhydrate and potassium permanganate in an acid solution. Because of the specifity of washing powders and the relative stability of peroxyhydrates, the dissolution of washing powders is likely to be incomplete and may result in a loss of oxygen; these disadvantages have been avoited by adoption of a particular…
Soaps — Determination of chlorides content — Potentiometric method
The method is carried out as follows: Potentiometric titration of the chloride ions with standard volumetric silver nitrate solution in a nitric acid medium, using a silver-silver chloride measurement electrode and a calomel reference electrode.
