Formic acid for industrial use — Methods of test — Part 5: Visual limit test for inorganic sulphates
The principle consists in a comparison of the turbidity, obtained by the addition of barium chloride to a solution prepared from a test portion in the presence of hydrochloric acid, with that similarly obtained from a standard sulphate solution. The method is a applicable to products having inorganic sulphates contents, expressed as sulphate (SO42-), in the range 0,001 to 0,1 % (m/m).
o-Chlorotoluene for industrial use — List of methods of test
Specifies the sampling, the determination of distillation characteristics, the determination of density at 20 °C, the determination of crystallizing point and the determination of p- and o-chlorotoluene content. The determination of distillation characteristics indicates the difference between the temperatures corresponding to the collection of two volumes of distillate, V0 and V1. These two…
p-Chlorotoluene for industrial use — List of methods of test
Specifies the sampling, the determination of distillation characteristics, the determination of density at 20 °C, the determination of crystallizing point and the determination of o- and p-chlorotoluene content. The determination of distillation characteristics indicates the difference between the temperatures corresponding to the collection of two volumes of distillate, V0 and V1. These two…
Aluminium and aluminium alloys — Determination of copper — Atomic absorption spectrophotometric meth...
The method is applicable to copper contents between 0,005 and 5 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Aluminium and aluminium alloys — Determination of nickel — Atomic absorption spectrophotometric meth...
The method is applicable to nickel contents between 0,005 and 3 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
The Standard specifies the following characteristics of the oil. Appearance: Clear, mobile liquid. Colour: Reddish brown to dark brown. Odour: Characteristic, spicy, recalling that of cinnamaldehyde. Refractive index at 20 °C: 1,5300 - 1,5400. Optical rotation at 20 °C: Range from - 2,5 to + 2 . Solubility in 70 % (V/V) ethanol at 20 C: 1 volume in 2 volumes. The values for the relative density…
Determination of crystallizing point — General method
The method is applicable in the range from about -50 °C to about +250 °C. the determination can be carried out directly on the sample as received, or on the dried sample, or on both. In which of these conditions the sample is to be tested will be stated in the specific test method for each material. The principle is based on cooling the liquid or liquefied sample and observation of the…
Phthalic anhydride for industrial use — Methods of test — Part 6: Determination of phthalic anhydrid...
The principle consists in the dissolution of a test portion in an excess of standard volumetric sodium hydroxide solution and back-titration of the excess with a standard volumetric hydrochloric acid solution using phenolphthalein as indicator. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.
Phthalic anhydride for industrial use — Methods of test — Part 7: Determination of maleic anhydride ...
The principle consists in the dissolution of a test portion in acetone, removal of 1,4-naphthoquinone present in the solution by extraction with benzene. Polarographic measurement of the aqueous solution and determination of the mass of maleic anhydride by means of the calibration graph. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.
Phthalic anhydride for industrial use — Methods of test — Part 10: Determination of 1,4- naphthaquin...
The principle consists in the development of a pink colour by heating a test portion containing 1,4-naphtoquinone with tin(II) chloride, and comparison of the colour produced with a series of prepared reference colours. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.
