Sawn timber — Determination of the average moisture content of a lot
Two methods are specified: a) Measuring the electrical resistance or conductance of the test pieces using an electrical moisture meter and b) determining the loss in mass after drying test pieces until absolutely dry.
Aluminium and aluminium alloys — Determination of lead content — Flame atomic absorption spectrometr...
The method is applicable to products having lead contents between 0,01 and 1,5 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Aluminium and aluminium alloys — Determination of chromium content — Flame atomic absorption spectro...
The method is applicable to products having chromium contents between 0,003 and 0,6 % (m/m). It may also be used for higher chromium contents Äup to 1,5 % (m/m) for instanceÜ. Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Manganese ores — Determination of chromium content — Diphenylcarbazide photometric method and silver...
Method I is applicable to manganese ores having chromium contents less than 0.1 % (m/m), method II is applicable to manganese ores having chromium contents greater than 0.1 % (m/m). This second edition cancels and replaces the first edition (i.e. ISO 619-1975). Should be read in conjunction with ISO 4297.
Solid mineral fuels — Determination of arsenic content using the standard silver diethyldithiocarbam...
The sample is oxidized by nitric and sulphuric acids or by the use of Eschka mixture. Then, using the method specified in ISO 2590, the arsenic is reduced by zinc in sulphuric acid or hydrochloric acid medium. The arsine formed is absorbed in a solution of silver diethyldithiocarbamate in pyridine. The purplish-red colour produced by the colloidally dispersed silver is measured photometrically at…
Manganese ores — Determination of sulphur content — Barium sulphate gravimetric methods and sulphur ...
Describes three methods: methods I and II are gravimetric methods which are applicable to maganese ores having sulphur contents greater than 0.01 % (m/m), and method III is a titrimetric method. Should be read in conjunction with ISO 4297. Specifies principle, reagents, apparatus, sample, procedure and expression of results. A figure illustrates the apparatus for determination of sulphur content…
Ethanol for industrial use — Methods of test — Part 9: Determination of esters content — Titrimetric...
The method is applicable to products having esters contents in the range 0.005 % (m/m) to 0.15 % (m/m). The principle consists in the saponification of esters present in a test portion by boiling with excess standard volumetric sodium hydroxide solution; determination of the residual sodium hydroxide, and hence the amount used for saponification, by titration with standard volumetric hydrochloric…
Ethanol for industrial use — Methods of test — Part 3: Estimation of content of carbonyl compounds p...
The method is applicable to products having carbonyl compounds contents between 0.00025 % (m/m) and 0.01 % (m/m). The principle is based on reaction in acid medium of the carbonyl compounds in a test portion with 2,4-dinitrophenylhydrazine. Formation of the corresponding 2,4-dinitrophenylhydrazones which, after making the solution alkaline, take on a red coloration. Photometric measurement of…
Ethanol for industrial use — Methods of test — Part 4: Estimation of content of carbonyl compounds p...
The method is applicable to products having carbonyl compounds contents equal to or greater than 0.01 % (m/m). The method only allows determination of those carbonyl compounds which react under the specified conditions. The principle is based on the reaction of hydroxylammonium chloride with the carbonyl compounds in a test portion and titration of the hydrochloric acid formed with standard…
