Rechercher

Equal volumes of potassium permanganate solution are added to a carpolactam test solution and to a blank (water). After standing for a specified time the absorbance, at a wavelength of 420 nm, of the test solution and of the blank are compared in cells of 5 cm thickness. The permanganat index is the difference between the absorbance of the test sample and that of the blank, multiplied by 100/3.…

From a methanolic solution of the test portion, the unsulfated matter is separated on an ion-exchange column (filled with a mixture of cation-exchange resins and anion-exchange resins). The unsulfated matter is recovered from the eluate by evaporation and weighing of the residue.

Applies to extruded silicone sleeving, general purpose, and general purpose with low volatile content.

Applicable to three-phase alternating-current switches, having making and breaking current ratings, for indoor and outdoor installations, for rated voltages 52 kV and above, and for rated frequencies up to and including 60 Hz. The contents of the corrigendum of February 1990 have been included in this copy.

Applies to insulating gloves and mitts. Gives six classes of gloves, differing in electrical characteristics, and six categories of gloves, differing in properties. The contents of the corrigendum of May 2000 have been included in this copy.

This method is for use in the laboratory determination of the amount of moisture present in textile materials.

The method is applicable to a concentration range of 1.5 to 20.0 % (m/m) of aluminium. ISO 8889 should be read in conjunction with ISO 6629. Specifies principle, reagents, apparatus, sample, procedure and expression of results.

Specification of general requirements and of specific requirements, as moisture content, grading, sampling, methods of test, packing and marking. A table shois 24 grades kof the product, inclusive grade designations, names used in the trade and characteristics of cashew kernels.