Coal — Determination of the crucible swelling number
The sample is heated in a covered crucible under standard conditions to a final temperature of 820 +- 5 °C. The coke button obtained is classified by comparison with the outlines of a set of standard profiles. The number of the profile most closely corresponding to the coke button obtained is the crucible swelling number. Gas or electrical heating may be used. When using an electrically heated…
Aircraft — Pressure fuel dispensing system — Test procedure and limit value for shut-off surge press...
Includes a standard method for testing. The method specified and the limit value apply to all ground systems, fixed and mobile. Also, because these both are standardized, necessary knowledge is provided for aiding proper design of the aircraft fill control valve shut-off characteristics.
Propan-2-ol for industrial use — Methods of test — Part 3: Test for miscibility with water
The procedure consists in addition of water to a test portion, under specified conditions, and followed by examination vertically for any opalescence or turbidity against a black background with side illumination. International Standards ISO 756/1, ISO 756/2 ans ISO 756/3 cancel and replace ISO Recommendation R 756-1968 of which they constitute a technical revision.
But-2-ene 1,4-diol for industrial use — Determination of iodine value
A test solution is treated with an excess of acidified potassium bromide-bromate solution in the presence of mercury(II) sulphate. After addition of potassium iodide solution the liberated iodine is titrated with standard volumetric sodium thiosulphate solution.
Fruits, vegetables and derived products — Determination of volatile acidity
The method consists in acidifying a test portion with tartaric acid, entraining the volatile acids by steam distillation and titrating the distillate with standard volumetric sodium hydroxide solution in the presence of phenolphthalein as an indicator. The method is applicable to all fresh products, to products preserved without chemical preservatives, and to products to which sulphur dioxide has…
1.1 Scope This standard covers draft hoods for use with: (a) Gas converted central heating equipment; (b) Gas water heaters; (c) Gas converted water heating equipment.
Butane-1,4-diol for industrial use — Determination of degree of unsaturation
A test portion is treated with a solution of bromine in absolute methanol saturated with sodium bromide (Kaufman solution). After addition of potassium iodide solution the liberated iodine is titrated with standard volumetric sodium thiosulfate solution. The degree of unsaturation is expressed as iodine value, the number of grams of iodine absorbed by 100 g of a substance under specified…
