Oxyde d'aluminium principalement utilisé pour la production de l'aluminium — Détermination...
La présente Norme internationale spécifie une méthode à un point de mesure pour la détermination, par adsorption d'azote, de l'aire massique (surface spécifique) de l'oxyde d'aluminium utilisé pour la production du métal. La limite inférieure est 0,1 m2.g-1. Comme limite supérieure, la présente méthode permet d'arriver à 1 000 m2.g-1 et même plus, mais il s'agit…
Butadiene for industrial use — Determination of oligomers — Gas chromatographic method
A liquid or a vaporized gaseous test portion is injected into a gas chromatography column. After passage of the test portion through this column the oligomers are separated. The detection is performed by flame ionization. The peaks obtained are compared with those derived from an external standard. The oligomers which may be present are: 4-vinyl cyclohexene, 1,3-cyclooctadiene, 1,5-cyclooctadiene…
Chemical products for industrial use — Sampling techniques — Solid chemical products in the form of ...
From the lot to be sampled a certain number of increments is taken. The increments are mixed to form either a bulk sample or several primary samples, depending on the purposes of the sampling. By means of replicate reductions a reduced sample is prepared from the bulk sample or from each primary sample, then several laboratory samples, each stage of the division being preceded in each case by…
Specifies requirements for fittings for threaded connections, used mainly for industrial purposes. Table 1 contains diagrams of types of fittings and their symbols. Tabulates the fitting dimensions (tables 2, 5, 9 to 12) with nominal sizes from DN 6 up to and including DN 100 (thread designation 1/8 to 4). Table 6 contains sockets (DN 6 to DN 150), reducing fittings are included in the tables 3,…
Propylene for industrial use — Determination of oligomers — Gas chromatographic method
A liquid sample obtained at low temperature is vaporized and then passed through a chromatographic column which permits the separation of the oligomers. The detection is performed by flame ionization an the peaks obtained are compared with those derived from an external standard. The method is applicable to propylene having propene dimers (hexenes) contents greater than 20mg/kg and propene…
Butadiene for industrial use — Determination of active tert-butyl-catechol (TBC) (4- (1,1- dimethyle...
The active TBC in a test portion is extracted by mixing with a solution containing m-nitrophpenol (as the internal standard) and evaporating the butadiene. The TBC and m-nitrophenol are separated by high-performance liquid chromatography and detected by UV: The peak areas or peak heights are measured and the TBC content is determined by using a calibration graph. The polymerization inhibitor TBC…
Hydraulic fluid power — Contamination analysis — Method for reporting analysis data
Specifies methods for reporting data relating to contamination levels of fluids used in industrial, mobile and marine applications for the following types of contamination analysis techniques: microscopic particle counting, automatic particle counter, gravimetric. Is intended to establish the minimum information required to allow valid comparison and interpretation of contamination level data.…
Ethylene and propylene for industrial use — Determination of acetone, acetonitrile, propan-2-ol and ...
The method comprises the passage of a gaseous test portion through water to absorb acetone, acetonitrile, propan-2-ol and methanol, and subsequent gas chromatographic analysis of the aqueous solution, using a flame ionization detector, and comparison of the peaks obtained with those derived from an external standard. The method is applicable to products having acetone, propan-2-ol and methanol…
