71.060.99 - Other inorganic chemicals
ICS 71.060.99 Details
Other inorganic chemicals
Weitere anorganische Verbindungen
Autres
Druge anorganske kemikalije
General Information
A test portion is evaporated at ambient temperature and the oil contained in the residue is extracted with carbon tetrachloride. The oil contained in the residue is determined either gravimetrically by evaporation of the organic solvent and weighing of the residue or by spectrometric measurement of the absorbance of the organic phase at a wavelength of approximately 3.42 m. The gravimetric method is applicable to products having an oil content equal to or greater than 10 mg/kg. The infra-red spectrometric method, being more sensitive, is applicable to products having an oil content greater than 1 mg/kg.
- Standard5 pagesEnglish languagesale 15% off
- Standard5 pagesFrench languagesale 15% off
- Standard5 pagesFrench languagesale 15% off
A test portion is evaporated in the presence of ethanediol and the water content of the residue is determined by the Karl Fischer method with direct electrometric measurement. The method is applicable to products having water contents equal to or greater than 50 mg/kg. For water contents greater than 1000 mg/kg it is preferable to dilute the evaporation residue with anhydrous methanol in accordance with ISO 4276 and titrate an aliquot portion of the diluted solution.
- Standard4 pagesEnglish languagesale 15% off
- Standard4 pagesFrench languagesale 15% off
- Standard4 pagesFrench languagesale 15% off
Specifies the apparatus and the procedure to be used. The procedure consists in removal of a sample into stainless steel cylinder, which has previously been cleaned, dried and evacuated and filling of the sampling cylinder with the stipulated quantity that is permissible with regard to safety. The filling shall never exceed 75 % of the capacity of the cylinder at ambient temperature.
- Standard3 pagesEnglish languagesale 15% off
- Standard3 pagesFrench languagesale 15% off
- Standard3 pagesFrench languagesale 15% off
The water present in a sample is tranformed into acetylene by reaction with calcium carbide. The acetylene formed is determined by gas chromatography using an external standard consisting of a standard gas mixture with an inert gas, containing a known amount of acetylene. The method is applicable to products having water contents between 5 mg/kg and 3000 mg/kg.
- Standard4 pagesEnglish languagesale 15% off
- Standard4 pagesFrench languagesale 15% off
- Standard4 pagesFrench languagesale 15% off
Applicable to products having a residue of equal to or more than 0.02 % (m/m). For products obtained in modern plants this evaluation is not usually required. Indicates to the risk in handling with this product. Analysis by evaporation, at ambient temperature, of a test portion and weighing of the residue. Titration of the ammonia contained in the residue with standard volumetric sulphuric acid solution in the presence of an indicator. Subtraction of this mass from that of the redidue. A typical apparatus for the test is shown in a figure.
- Standard3 pagesEnglish languagesale 15% off
- Standard4 pagesFrench languagesale 15% off
- Standard4 pagesFrench languagesale 15% off