5605;5590 标准查询与下载

ISO 1592:1977 工业用尿素 氮含量的测定 蒸馏后滴定法

The procedure is based on the catalytic conversion of nitrogen present in a test portion to ammonia by heating in concentrated sulphuric acid solution. Distillation and absorption of the ammonia in an excess of standard volumetric sulphuric acid solution and back-titration with standard volumetric sodium hydroxide solution in the presence of an indicator. - Replaces ISO Recommendation R 1592-1970.

Urea for industrial use; Determination of nitrogen content; Titrimetric method after distillation

ISO 1594:1977 工业用尿素 灰分的测定

The procedure consists in the ignition of a test portion in a platinum dish at (800 25) ?C to constant mass. - Replaces ISO Recommendation R 1594-1970.

Urea for industrial use; Determination of ash

ISO 1593:1977 工业用尿素 碱度的测定 滴定法

The principle consists in titration of the alkalinity of a test portion with a standard volumetric hydrochloric acid solution in the presence of an indicator. - Replaces ISO Recommendation R 1593-1970.

Urea for industrial use; Determination of alkalinity; Titrimetric method

ISO 1390-2:1977 工业用顺丁烯二酸酐 试验方法 第2部分:熔融物色度测定

The principle is based on the measurement of colour, by the method specified in ISO 2211, of a test portion in the molten state. The results are expressed in Hazen units. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.

Maleic anhydride for industrial use; Methods of test; Part II : Measurement of colour of the molten material

ISO 1390-5:1977 工业用顺丁烯二酸酐 试验方法 第5部分:灰分的测定

The principle consists in burning a test portion and heating in a furnace controlled at (600 30) ?C, until all carbonaceous matter has disappeared, to constant mass. The residue may be retained for the determination of iron. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.

Maleic anhydride for industrial use; Methods of test; Part V : Determination of ash

ISO 1390-4:1977 工业用顺丁烯二酸酐 试验方法 第4部分:顺丁烯二酸酐含量的测定 滴定法

The principle consists in the dissolution of a test portion in diluted standard volumetric sodium hydroxide solution and titration with standard volumetric sodium hydroxide solution in presence of phenolphthalein as indicator. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.

Maleic anhydride for industrial use; Methods of test; Part IV : Determination of maleic anhydride content; Titrimetric method

ISO 1390-3:1977 工业用顺丁烯二酸酐 试验方法 第3部分:游离酸度的测定 电位滴定法

The procedure is based on the potentiometric titration of the free acidity in a test portion with a standard volumetric triethylamine solution in anhydrous methyl ethyl ketone (butanone). - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.

Maleic anhydride for industrial use; Methods of test; Part III : Determination of free acidity; Potentiometric method

ISO 761:1977 工业用乙酸酐和正丁醇 溴值的测定

Acetic anhydride and butan-1-ol for industrial use; Determination of bromine number

ISO 1699:1977 工业用对二氯苯 试验方法一览表

Specifies the sampling, the determination of crystallizing point, the determination of residue on evaporation.

P-Dichlorobenzene for industrial use; list of methods of test

ISO 1389-6:1977 工业用邻苯二甲酸酐 试验方法 第6部分:邻苯二甲酸酐含量的测定 滴定法

The principle consists in the dissolution of a test portion in an excess of standard volumetric sodium hydroxide solution and back-titration of the excess with a standard volumetric hydrochloric acid solution using phenolphthalein as indicator. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

Phthalic anhydride for industrial use; Methods of test; Part VI : Determination of phthalic anhydride content; Titrimetric method

ISO 1389-7:1977 工业用邻苯二甲酸酐 试验方法 第7部分:顺丁烯二酸酐含量的测定 极谱法

The principle consists in the dissolution of a test portion in acetone, removal of 1, 4-naphthoquinone present in the solution by extraction with benzene. Polarographic measurement of the aqueous solution and determination of the mass of maleic anhydride by means of the calibration graph. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

Phthalic anhydride for industrial use; Methods of test; Part VII : Determination of maleic anhydride content; Polarographic method

ISO 1389-8:1977 工业用邻苯二甲酸酐 试验方法 第8部分:灰分测定

The principle consists in burning a test portion and heating in a furnace controlled at (600 30) ?C, until all carbonaceous matter has disappeared, to constant mass. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

Phthalic anhydride for industrial use; Methods of test; Part VIII : Determination of ash

ISO 1389-9:1977 工业用邻苯二甲酸酐 试验方法 第9部分:低温下可被高锰酸钾氧化杂质含量的测定 碘量法

This method is not specific for maleic anhydride. The polarographic method specified in part 7 should be used. The principle is based on the oxidation of unsaturated organic acids and anhydrides in a test portion with an excess of cold standard volumetric potassium permanganate solution in the presence of sulphuric acid, followed by iodometric determination of the potassium permanganate remaining. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

Phthalic anhydride for industrial use; Methods of test; Part IX : Determination of impurities oxidizable in the cold by potassium permanganate; Iodometric method

ISO 1389-10:1977 工业用邻苯二甲酸酐 试验方法 第10部分:1,4-萘醌含量的测定 比色法

The principle consists in the development of a pink colour by heating a test portion containing 1, 4-naphtoquinone with tin(II) chloride, and comparison of the colour produced with a series of prepared reference colours. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

Phthalic anhydride for industrial use; Methods of test; Part X : Determination of 1,4- naphthaquinone content; Colorimetric method

ISO 1389-4:1977 工业用邻苯二甲酸酐 试验方法 第4部分:硫酸处理后色度的测定

The test sample is treated with sulphuric acid solution in a conical flask in boiling water bath for 3 h. The colour is measured by the method specified in ISO 2211. The results are expressed in Hazen units. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

Phthalic anhydride for industrial use; Methods of test; Part IV : Measurement of colour after treatment with sulphuric acid

ISO 1389-3:1977 工业用邻苯二甲酸酐 试验方法 第3部分:色度稳定性的测定

The principle is based on the measurement of the colour of a test portion, by the method specified in ISO 2211, after a specified heat treatment. The test sample is maintained in a colorimetric tube in an electrically heated aluminium block, controlled at (250 3) ?C for 90 min, in the molten state. The results are expressed in Hazen units. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

Phthalic anhydride for industrial use; Methods of test; Part III : Measurement of colour stability

ISO 1389-2:1977 工业用邻苯二甲酸酐 试验方法 第2部分:熔融物色度的测定

The principle is based on the measurement of colour, by the method specified in ISO 2211, of a test portion in the molten state. The results are expressed in Hazen units. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

Phthalic anhydride for industrial use; Methods of test; Part II : Measurement of colour of the molten material

ISO 1385-5:1977 工业用邻苯二甲酸酯类 试验方法 第5部分:酯含量的测定 皂化后滴定法

The principle consists in the saponification of ester in a test portion, using a measured excess of potassium hydroxide ethanolic solution, followed by back-titration with standard volumetric hydrochloric acid solution in the presence of phenolphthalein as indicator. - ISO 1385, Part 1 to Part 5 replace ISO Recommendation R 1385-1970

Phthalate esters for industrial use; Methods of test; Part V : Determination of ester content; Titrimetric method after saponification

ISO 1393:1977 工业用液体卤代烃 酸度的测定 滴定法

The method does not apply when the halogenated materials hydrolyse at ambient temperature. The principle is based on the titration of the acidity of the aqueous extract from a test portion with a standard volumetric sodium hydroxide solution in the presence of bromocresol green as indicator. - Replaces ISO Recommendation R 1393-1970.

Liquid halogenated hydrocarbons for industrial use; Determination of acidity; Titrimetric method

ISO 1394:1977 工业用液体卤代烃 浊点的测定

Specifies a simple method for detecting the presence of certain impurities (generally water) which, dissolved at ambient temperature, cause the formation of cloudiness when the product is cooled to a sufficiently low temperature. The principle consists in determination of the temperature at which cloudiness appears in the clear sample, when it is gradually cooled under specified conditions. - Replaces ISO Recommendation R 1394-1970.

Liquid halogenated hydrocarbons for industrial use; Determination of cloud point