共找到 12 条与 相关的标准,共 1 页
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Surface active agents-Washing powders-Determination of inorganic sulfates-Gravimetric method
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Surface active agents-Washing powders-Determination of total silica content-Gravimetric method
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Surface active agents-Washing powders-Determination of total boron content-Titrimetric method
An aliquot portion of a standard solution of sodium lauryl sulfate is titrated with a solution of the test sample, according to the direct two-phase titration procedure describes in ISO 2271. The method is applicable to solids or to aqueous solutions of the active material. The relative molecular mass of the cationic-active matter shall be known or previously determined if its content is expressed as a percentage by mass. The method is not applicable if anionic surface-active agents are present.
Surface active agents; detergents; determination of cationic-active matter content; part 1: high-molecular-mass cationic-active matter
This International Standard specifies a method for the deter-mination, in detergents, of anionic-active matter hydrolyzable and non-hydrolyzable under acid conditions. This active matter includes alkyl sulfates and hydroxysulfates and alkylphenol and fatty alcohol ethoxysulfates. The mean relative molecular mass of the two types of active matter must be known or previously determined, if their con-tent is expressed as a percentage by mass. If the detergent con-tains perborate, this must be destroyed before the hydrolysis.
Surface active agents; Detergents; Determination of anionic-active matter hydrolyzable and non-hydrolyzable under acid conditions
From a test portion all ethanol-soluble matter is removed by extraction with ethanol. The solution of the ethanol-insoluble residue is treated with hydrochloric acid and evaporated to dryness. The residue is dissolved in water and the operations are repeated twice. From the solution obtained after this operations the precipitate is filtered, washed, heated to 900 鳦 and weighed.
Surface active agents; Washing powders; Determination of total silica content; gravimetric method
From a test portion all ethanol-soluble matter is removed by extraction with ethanol. In the presence of silicates the solution of the residue is treated with hydrochloric acid and evaporated to dryness. The residue is dissolved in water and the operations are repeated twice. The last solution is filtered and in the filtrate or in the silicatefree solution of the first step the sulfates are precipitated with barium chloride. The precipitate is filtered, washed, heated at 900 degree Celsius and weighed.
Surface active agents; Washing powders; Determination of inorganic sulfates; Gravimetric method
Surface active agents and detergents; methods of sample division; identical with ISO 607, edition 1980
Surface active agents: washing powders; determination of apparent density; method by measuring the mass of a given volume
Surface active agents; detergents; determination of anionic-active matter (direct two-phase titration procedure)
From an aqueous aolution of a sample the phosphates are removed by passing the solution over an ion-exchange resin. Then a boric acid mannitol complex is formed and titrated.
Surface active agents; Washing powders; Determination of total boron content; Titrimetric method
Washing powders. Determination of total phosphorus (V)oxide content.quinoline phosphomolybdate gravimetric method.
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