G15 有机化工原料综合 标准查询与下载

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 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 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 4274:1977 工业用尿素 缩二脲含量的测定 火焰原子吸收和光度吸收法

Applicable to products having contents of equal to or more than 0.05 % (m/m) (with flame atomic absorption) or 0.1 % (m/m) (with fotometric absorption). Covers the formation of a complex between biuret and copper(II) sulphate in alkaline medium. Fixation of this complex on an anion exchange resin. Elution of Cu first with a potassium nitrate solution and then with a nitric acid solution. Flame atomic absorption: aspiration of the solution into an acetylene-air flame and measurement of the absorption of the 325-nm line emitted by a copper hollow-cathode lamp; or by photometric absorption: formation of a coloured complex between Cu and zinc dibenzyldithiocarbamate, extraction with carbon tetrachloride and measurement at a wavelength of about 435 nm. Has also been approved by the IUPAC.

Urea for industrial use; Determination of biuret content; Flame atomic absorption and photometric absorption methods

NAVY MIL-M-81999 A-1977 飞机非致癌物质固化聚氨酯抗逆转模塑化合物的结构

This specification covers the requirements for two component, chemically elevated temperature curing, reversion resistant polyether for added strength and protection against the passage of air, liquids and vapors. carcinogens.. polyurethane compounds for filling and sealing aircraft structures Component materials and cured compound shall not contain any known

MOLDING COMPOUND, REVERSION RESISTANT, NON- CARCINOGEN CURING POLYURETHANE, AIRCRAFT STRUCTURE

ISO 1843-5:1977 工业用高级醇 试验方法 第5部分:醇类总含量的测定 滴定法

Relates to C6 to C13 alcohols. The principle based on esterification of alcohols present in a test portion by means of acetic anhydride, and titration of the excess acetic anhydride with a standard volumetric ethanolic potassium hydroxide solution, in the precence of phenolphtalein as indicator.

Higher alcohols for industrial use; Methods of test; Part V : Determination of total alcohols content; Titrimetric method

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 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 1390-1:1977 工业用顺丁烯二酸酐 试验方法 第1部分:总则

The document also specifies the method to be used for the determination of the crystallizing point. Before carrying out the tests, the sample shall be grind to a fine powder and shall be mixed thoroughly. Exposure to moist air may lead to the formation of maleic acid. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.

Maleic anhydride for industrial use; Methods of test; Part I : General

ISO 1843-1:1977 工业用高级醇 试验方法 第1部分:总则

Gives general instructions for C6 to C13 alcohols and also specifies the methods to be used for the measurement of the colour, the determination of the density at 20 ?C and the determination of the water content.

Higher alcohols for industrial use; Methods of test; Part I: General

ISO 1843-2:1977 工业用高级醇 试验方法 第2部分:用酚酞指示剂测定酸度 滴定法

Relates to C6 to C13 alcohols. The principle consists in titration of a test portion with standard volumetric sodium hydroxide solution, in ethanolic, using phenolphthalein as indicator. The result is expressed in milliequivalents per kilogram. Alternatively, the acidity may also be expressed in terms of the acid value.

Higher alcohols for industrial use; Methods of test; Part II: Determination of acidity to phenolphthalein; Titrimetric method

ISO 1843-3:1977 工业用高级醇 试验方法 第3部分:羰基化合物含量的测定 电位滴定法

Relates to C6 to C13 alcohols. The principle bases on reaction of carbonyl compounds present in a test portion with hydroxylammonium chloride to from an oxime, and potentiometric titration of the hydrochloric acid liberated with standard volumetric ethanolic potassium hydroxide solution.

Higher alcohols for industrial use; Methods of test; Part III : Determination of carbonyl compounds content; Potentiometric method

ISO 1843-6:1977 工业用高级醇 试验方法 第6部分:灰分的测定

Relates to C6 to C13 alcohols. The principle of the method is based on burning of a test portion and heating in a platinum or silica dish at (600 +- 30) ?C to constant mass. ISO 1843/6 replaces ISO Recommendation R 1851-1970.

Higher alcohols for industrial use; Methods of test; Part VI : Determination of ash

ISO 1843-4:1977 工业用高级醇 试验方法 第4部分:溴值的测定 含氯化汞(Ⅱ)时滴定法

Relates to C6 to C13 alcohols. The principle of the method consists in titration of test portion with standard volumetric potassium bromide/bromate solution in the presence of methyl orange as indicator.

Higher alcohols for industrial use; Methods of test; Part IV : Determination of bromine number; Titrimetric method in the presence of mercury(II) chloride

ISO 1897-3:1977 工业用苯酚、邻甲酚、间甲酚、对甲酚、甲苯基酸和二甲苯酚 试验方法 第3部分:中性油和吡啉碱的测定

Specifies a volumetric method, after distillation, for determining of neutral oils, and a titrimetric method, after distillation, for determining of pyridine bases. The principle is based on distillation from an aqueous alkaline solution of a test portion. Measurement of the volume of neutral oils collected. Titration of the bases present in the aqueous distillate and in the oils with standard volumetric hydrochloric acid solution using methyl orange and xylene cyanol FF as indicator. An assembled distillation apparatus is shown in a figure.

Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use; Methods of test; Part 3 : Determination of neutral oils and pyridine bases

ISO 1897-2:1977 工业用苯酚、邻甲酚、间甲酚、对甲酚、甲苯基酸和二甲苯酚 试验方法 第2部分:水含量的测定 Dean and Stark 法

The principle of the method is based on distillation of a test portion in the presence of an appropriate solvent, in a Dean and Stark apparatus. Determination of the volume of condensate collected in the receiver tube, brought to ambient temperature, assuming this liquid to be water. An appropriate solvent is xylene, solvent naphtha or alternatively, toluene. ISO 1897-2 replaces ISO/R 1898-1971.

Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use; Methods of test; Part II : Determination of water; Dean and Stark method

ISO 1897-1:1977 工业用苯酚、邻甲酚、间甲酚、对甲酚、甲苯基酸和二甲苯酚 试验方法 第1部分:总则

Gives also the procedure to be used for the determination of water content by the Karl Fischer method. This method is applicable only to liquefied phenol and m-cresol. The determination of density at 20 ?C is applicable only to liquefied phenol, m-cresol, cresylic acid and xylenols.

Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use; Methods of test; Part I : General

ISO 1897-9:1977 工业用苯酚、邻甲酚、间甲酚、对甲酚、甲苯基酸和二甲苯酚 试验方法 第9部分:间甲酚含量的测定(只用于甲苯基酸)

The method is applicable to a product containing 35 % (m/m) to 60 % (m/m) of m-cresol, not more than 5 % (m/m) of phenol, and not more than 35 % (m/m) of o-cresol. The principle is based on dehydration of a quantity of the test sample. Formation of a complex between m-cresol and urea by addition of excess urea to a test portion of the dehydrated sample. Determination of the crystallizing point of the complex in a crystallizing point apparatus. Calculation of the content from the water content of the test sample and the crystallizing point of the complex. The relation between crystallizing point and m-cresol content of m-cresol/urea mixtures is given in a table. ISO 1897/9 replaces ISO Recommendation R 1911-1971.

Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use; Methods of test; Part IX : Determination of m-cresol content (Cresylic acid only)