Aluminium and aluminium alloys — Determination of magnesium — Atomic absorption spectrophotometric m...
The method is applicable to products having magnesium contents between 0,01 and 5 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use — Methods of tes...
Gives also the procedure to be used for the determination of water content by the Karl Fischer method. This method is applicable only to liquefied phenol and m-cresol. The determination of density at 20 °C is applicable only to liquefied phenol, m-cresol, cresylic acid and xylenols.
Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use — Methods of tes...
This method is the best available at the present time. It was primarily intended for samples containing 40 % (m/m) or more but has been extended to lower ranges. The principle is based on dehydration of a quantity of the test sample. Formation of a complex between o-cresol and cineole (having a crystallizing point not lower than 1,2 °C) by addition of excess cineole to a test portion of the…
Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use — Methods of tes...
The method is applicable to a product containing 35 % (m/m) to 60 % (m/m) of m-cresol, not more than 5 % (m/m) of phenol, and not more than 35 % (m/m) of o-cresol. The principle is based on dehydration of a quantity of the test sample. Formation of a complex between m-cresol and urea by addition of excess urea to a test portion of the dehydrated sample. Determination of the crystallizing point of…
Phthalic anhydride for industrial use — Methods of test — Part 11: Determination of iron content — 2...
The principle is based on the dissolution, in hot hydrochloric acid, of the residue from the determination of the ash of a test portion (see ISO 1389/8). Reduction, by hydroxylammonium chloride, of the iron(III) contained in the solution thus obtained, formation of the coloured complex iron(II)-2,2'bipyridyl in a buffered medium. Photometric measurement of the coloured complex at a…
Formic acid for industrial use — Methods of test — Part 6: Determination of iron content — 2,2'...
Conversion of the iron in a test portion to iron(III) sulphate by evaporation to dryness in the presence of sulphuric acid. Dissolution in nitrid acid, reduction of the trivalent iron in the solution thus obtained by hydroxylammonium chloride. Photometric measurement of the coloured complex iron(II)-2,2' -dipyridyl. Applicable to products having Fe contents in the range 0,1 to 2 mg/kg.
Milk and milk products — Determination of fat content — Mojonnier-type fat extraction flasks
Specifies the characteristics of flasks for gravimetric methods. The flasks to be made from borosilcate glass are designed to enable a supernatant solvent layer to be decanted almost completely from an underlaying aqueous layer. A figure shows three permissible forms of flask whose dimensions are listed in a table. A second table gives guidance on additional dimensions for these flask types.
Sodium hexafluorosilicate for industrial use — Determination of free acidity and total hexafluorosil...
With respect to the free acidity, applicable to products having contents, expressed as H2 SiF6 , equal to or more than 0,1 % (m/m). First, determination of the free acid contents by titration of an ice-cooled test portion with a standard volumetric sodium hydroxide solution in the presence of potassium nitrate and using bromothymol blue as indicator, then, followed by titration at near boiling…
Diffusable Hydrogen in Mild Steel and Low-Alloy Steel Weld Metals: Test
Method
1. Scope
1.1 The purpose of this Standard is to provide a test method for measuring
the content of diffusible hydrogen in deposited weld metal.
Note: In order to obtain the total hydrogen content, it would be
necessary to obtain the residual content by hot extraction at 650°C
under vacuum or using a carrier gas method.
1.2 This assessment shall…
