Magnetic tape sound recording and reproducing systems - Part 2: Calibration tapes
Specifies the minimum requirements for calibration tapes for making adjustment and comparative assessments of the reproducing performance of both professional and domestic magnetic tape recording/reproducing equipment. Applies to both lubricated and non-lubricated tapes, recorded across specified parts or the full width of the tape. The contents of the corrigendum of March 1995 have been included…
Foreword
Organizations of all types and sizes are giving increasing attention to establishing systems and procedures that will ensure that their operations are environmentally efficient. They are also considering ways by which the efforts being made in this regard and the results of those efforts can best be communicated to their various audiences. Environmental reporting is still in its…
Soil quality — Determination of effective cation exchange capacity and base saturation level using b...
Specifies a method for the determination of the cation exchange capacity (CEC) at the pH of the soil and for the determination of the content of exchangeable sodium, potassium, calcium and magnesium in soil. Is applicable to all types of air-dried soil samples; pretreatment according to ISO 11464 is recommended. The determination of CEC as specified here is a modification of the method by Gillman.
The principle of the method specified is dissolving a test portion in dimethylformamide and injecting a small volume of the solution into a gas chromatograph equipped with flame ionization detector to separate and detect the volatile components. The solvent contains a known amount of propionitrile or acetonitrile as an internal standard for quantitative evaluation. With this method, a lower…
Aviation fuels — Estimation of net specific energy
Describes a procedure for the estimation of the net specific energy of aviation fuels from their aniline point, density and sulfur content. Not applicable to pure hydrocarbons. The method is purely empirical and is applicable only to liquid hydrocarbon fuels derived by normal refining processes from conventional crude oil which conform to the requirements of specifications for aviation gasolines…
Earth-moving machinery — Tractor-scrapers — Terminology and commercial specifications
Establishes terminology and the content of commercial literature specifications for self-propelled tractor-scrapers, and their equipment. Applies to tractor-scrapers as defined in ISO 6165. Covers the base machine, attachment, and performance terminology and contains an annex.
Methods of Testing Pulp and Paper Mill Effluents and Water - Determination of
Solids Contents of Pul...
This method defines and prescribes ways for determining the amount of total,
fixed and volatile fractions of suspended and dissolved solids, and settleable
solids, in pulp and paper mill effluents.
Plastics — Hardeners and accelerators for epoxide resins — Determination of free acid in acid anhydr...
The principle of the method specified is reacting a small amount of free acid present in a test portion of acid anhydride hardener or accelerator with rhodamine 6G to colour the test solution pink, measuring the absorbance of the coloured solution at a wavelength of about 510 nm using a spectrometer, determining the free-acid content from a calibration curve. The method is suitable for most…
Electrical installations of buildings - Part 5: Selection and erection of electrical equipment - Cha...
Contains general data for selection and erection of switchgear and controlgear. It covers devices for protection against indirect contact by automatic disconnection of supply, devices for protection against overcurrent and information about coordination of various protective devices. This second edition is renumbered to fall in line with Part 4 of IEC 60364. The contents of the corrigendum of…
The principle of the method specified is decomposing a test portion in nitric and sulfuric acids, separating copper from interfering elements (silver, arsenic, antimony, selenium, tin, iron, bismuth, and tellurium), determining traces of copper in the electrolyte, the filtrate, all precipitates and residues by flame atomic absorption spectrometry (FAAS), dissolving and analysing copper deposits…
