The specified methods apply to sampling from containers of all sizes. Separate methods are described for sampling at the point of manufacture, sampling at susequent stages in the distribution chain and sampling of retail packs. In addition, different procedures or special precautions are specified depending on wether the samples are to be used for examination of particle characteristics (for…
Paints and varnishes — Determination of total mercury — Flameless atomic absorption spectrometric me...
The reference method described is applicable to products having total mercury contents in the range of about 0.01 % (m/m) to 0.5 % (m/m). May also be extended to products with a total content of more than 0.5 % (m/m). The principle of the method consists in the combustion of the test portion with oxygen in an enclosed system. Reduction of the mercury(II) compounds contained in the resulting…
Paints and varnishes — Determination of total lead — Flame atomic absorption spectrometric method
The method is principle to coating materials having lead contents in the range of about 0,01 % (m/m) to 2 % (m/m), may also be applicable to products with a total lead content of more than 2 % (m/m) when the requirements of precision does not exceed the specified values. two methods are given. The principle of the dry ashing method consists in evaporation of a test portion to dryness and ashing…
Oil of cedarwood, Virginia (Juniperus virginiana Linnaeus)
The Standard specifies the following characteristics of the oil. Appearance: Fairly viscous liquid, sometimes containing crystals. Colour: Almost colourless to pale yellow. Odour: Characteristic, woody, pleasantly sweet and balsamic, recalling the wood of the tree. Relative density at 20/20 C: 0,941 - 0,970. Refractive index at 20 °C: 1,5040 - 1,5080. Optical rotation at 20 °C: Range from - 38 to…
Copper alloys — Determination of nickel content — Titrimetric method
The method is applicable to contents of nickel as an alloying element in all types of copper alloys listed in International Standards. ISO 4743 specifies principle, reagents, apparatus, procedure, expression of results and test report.
Oil of pimento leaf (Pimenta dioica (Linnaeus) Merrill)
The Standard specifies the following characteristics of the oil. Appearance: Mobile liquid. Colour: Orange-yellow to dark brown (Jamaica) to reddish brown (India). Odour: Characteristic, dry woody and some different for Jamaica and India. Taste: Spicy, warm and slightly burning. Relative density at 20/20 °C: 1,036 - 1,053. Refractive index at 20 °C: 1,5310 - 1,5360. Miscibility with 70 % (V/V)…
Paints and varnishes — Determination of "soluble" metal content — Part 2: Determination of...
The methods are applicable to coating materials having "soluble" antimony contents in the range of about 0,05 % (m/m) to 5 % (m/m). The AAS method should be used as the referee method in cases of dispute. The principle of the flame atomic absorption spectrometric method consists in aspiration of the test solution into acetylen/air flame. measurement of the absorption of the selected…
