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…
Paints and varnishes — Determination of "soluble" metal content — Part 3: Determination of...
The principle consists in the aspiration of the test solution into a dinitrogen monoxide/acetylene flame. Measurement of the radiation emitted by barium at a wavelength of 553,5 nm. The ionization of barium atoms in the flame is suppressed by addition of potassium chloride. The method is applicable to coating materials having "soluble" barium contents in the range of about 0,05 % (m/m)…
Paints and varnishes — Determination of "soluble" metal content — Part 4: Determination of...
The principle of the AAS method consists in inspiration of the test solution into an acetylen/air flame. Measurement of the absorption of the selected spectral line emitted by a cadmium hollow-cathode or cadmium discharge lamp, in the region of 228,8 nm. The principle of the polarographic method consists in electrolysis of the test solution in a polarographic cell measurement of the corresponding…
Paints and varnishes — Determination of "soluble" metal content — Part 5: Determination of...
The principle consists in formation of a coloured complex from hexavalent chromium and diphenylcarbazide solution. After addition of orthophosphoric acid and sulfuric acid, spectralphotometric easurement of the colour at a wavelength in the region of 540 nm. The method is applicable to coating materials having hexavalent chromium contents in the range of about 0,05 % (m/m) to 5 % (m/m). This…
Carbonaceous materials used in the production of aluminium — Green and calcined coke — Determination...
A test portion of a dry, finely ground sample is heated in a tared platinum dish in a furnace at 700 degrees centigrade to constant mass. The residue is cooled and weighed.
Fruit and vegetable products — Determination of formic acid content — Part 2: Routine method
The method consists in quantitative entraining by steam of the acid present in a test portion, determing of the amount of iodine equivalent to the amount of bromine consumed by the acid in the distillate, by titration with sodium thiosulfate standard volumetric solution.
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…
Fruits, vegetables and derived products — Determination of lead content — Flameless atomic absorptio...
The method consists in decomposing the organic matter in a nitric acid medium at high temperature and under pressure, and determining the lead(II) cation with a suitable spectrometer after the addition of orthophosphoric acid.
