High-voltage test techniques. Part 1: General definitions and test requirements
Applies to dielectric tests with direct voltage, dielectric tests with alternating voltage; dielectric tests with impulse voltage and impulse current, and tests with combinations of these.
The contents of the corrigendum of March 1992 have been included in this copy.
Water quality — Determination of chloride — Silver nitrate titration with chromate indicator (Mohr&#...
The method specified is applicable to the direct determination of dissolved chloride in concentrations between 5 mg/l and 150 mg/l. The working range may be extended to 400 mg/l by using a burette of larger capacity or by sample dilution. Due to many interferences the method is not applicable to heavily polluted waters of low chloride content.
Nickel alloys — Determination of chromium content — Potentiometric titration method with ammonium ir...
Applies to the determination of 1 % (m/m) to 25 % (m/m) chromium content in nickel alloys which do not contain insoluble chromium carbides, and which have a vanadium content of less than 0,2 % (m/m). Specifies principle, reagents, apparatus, sampling and sample preparation, procedure, expression of results, special cases and test report. Examples of composition of some nickel alloys are given in…
Surface active agents — Technical alkane sulfonates — Methods of analysis
Specifies the following methods of analysis for the substance to be tested: measurement of pH, determination of water content, determination of free alkalinity or free acidity, determination of matter extractable by light petroleum, determination of sodium alkane sulphonates content, determination of alkane monosulphonates content, determination of sodium sulphite content, determination of sodium…
Magnetite for use in coal preparation — Test methods
Specifies methods for sampling and testing of magnetite. The specified tests should ensure that the properties which make magnetite suitable for coal preparation purpose are simply and adequately tested. These properties are: moisture content, particle size distribution, total magnetics content, relative density, total iron(II) content, fundamental magnetic properties.
Nickel alloys — Determination of iron content — Titrimetric method with potassium dichromate
Applies to the determination of the iron content of nickel alloys in the range 1 % (m/m) to 50% (m/m). The method is applicable only to alloys containing less than 0,2 % (m/m) of vanadium. Specifies principle, reagents, apparatus,sampling and sample preparation, procedure, expression of results, and test report. Examples of composition of some nickel alloys are given in annex A.
Is applicable to ores containing between 0,005 % (m/m) and 0,1 % (m/m) of vanadium pentoxide. Specifies principle, reagents, apparatus, sampling and samples, procedure, expression of results and test report. Annex A (normative) gives the flowheet of the procedure for the acceptance of test results, annex B (informative) shows the graphical representation of precision data.
Water quality — Determination of the chemical oxygen demand
Method specified is applicable to water with a value between 30 mg/l and 700 mg/l. The chloride contents must not exceed 1 000 mg/l. If the value exceeds 700 mg/l, the water sample is diluted. For greatest accuracy it is preferable that the value of the sample is in the range of 300 mg/l to 600 mg/l.
