首页 > 资源导航 > 标准 > 化工 > 有机化工原料
标准分类
发布日期
全部
订阅
收起
标准
  • ISO 6795-1983 - 中外标准 - - 1983/12 - 废止
    The free alcohol is reacted with vanadium(V) sodium salt of quinolin-8-ol(8-hydroxyquinoline) to form a coloured complex. The complex is extracted with toluene and then treated with dichloroacetic acid. The spectrometric measurement is carried out at a wavelength of about 620 nm. The method is applicable to products having free alcohol contents between 0,01 and 5,0 % (m/m).
  • ISO 757-4-1983 - 中外标准 - - 1983/12 - 废止
    The principle of the procedure consists in addition to a test portion, under specified conditions, of potassium permanganate solution. Determination of the time taken for the colour of this test solution to match that of a cobalt(II) chloride and uranyl nitrate colour standard. This document should be read in conjenction with ISO 757/1.
  • ISO 918-1983 - 中外标准 - - 1983/12 - 现行
    Relates to liquids (excluding petroleum products) having a boiling point in the range 30 °C to 300 °C and are stable during distillation in atmospheric conditions. Specifies also the distillation apparatus. The principle consists in a) distillation of a test portion under carefully defined conditions in order to determine the temperature corresponding to the condensate volumes defined (plotting temperature as a function of volume) or b) under the same conditions to determine the volume of condensate when the thermometer indicates each of the distillation temperatures specified (plotting volume as a function of temperature).
    液体测定试验结果挥发物质蒸馏试验工业产品化学制品有机物质馏程试验设备ChemicalsDeterminationDistillationIndustrial productsLiquidsOrganic mattersSubstancesTest equipmentTest resultsTestingTestsVolatile
  • CNS 10658-1983 - 中外标准 - - 1983/11 - 现行
    邻苯二甲酸酯丁基化合物
  • CNS 10657-1983 - 中外标准 - - 1983/11 - 现行
    邻苯二甲酸酯辛基化合物
  • ISO 1897-11-1983 - 中外标准 - - 1983/11 - 废止
    The test may be carried out on products as received or on a dried sample. The method specified in ISO 2208 shall be applied for drying. The principle of the method consists in cooling the liquid or liquefied test portion and observation of the temperature during crystallization under defined conditions. A simplified crystallization point apparatus is given in the figure. It takes into account the properties of these products.
  • ISO 1386-1983 - 中外标准 - - 1983/11 - 废止
    Gives general instructions and specifies methods of analysis for these chemical products. The methods are the following: determination of density at 20 °C; determination of dry residue after evaporation on a water bath; measurement of colour; determination of distillation characteristics; determination of water content; determination of acidity; and determination of ester content (titrimetric method). - Cancels and replaces ISO Recommendation R 1386-1970 and constitutes a technical revision thereof.
  • ISO 1897-13-1983 - 中外标准 - - 1983/11 - 废止
    Applicable to products having a high o-cresol content and a high m-cresol content. The principle consists in distillation of a tast portion under carefully defined conditions and determination of the mass of residue obtained. The distillation is carried out according to ISO 918. When all the water has distilled over, continue the distillation without intermediate measurements, until either the dry point or the final boiling point is reached.
  • ISO 1897-12-1983 - 中外标准 - - 1983/11 - 废止
    The method is applicable to products having high cresol contents. The principle consists in distillation of a test portion inder carefully defined conditions. Either determination of the temperatures corresponding to the condensate volumes defined or determination of the volume condensate when the thermometer indicates each of the distillaton temperatures (i.e. plotting temperature as a function of volume or plotting volume as a function of temperature).
  • ISO 753-3-1983 - 中外标准 - - 1983/10 - 废止
    Specifies the determination of total reducing matter and of reducing compounds other than formic acid. The principle consists in oxidation of formic acid and other reducing compounds in a test portion with an excess of sodium hypobromit solution. Determination of the excess sodium hypobromite by iodometry. Oxidation of reducing compounds other than formic acid with an excess of potassium bromide-bromate solution in an acid media. Determination of the excess potassium bromide-bromate by iodometry. Determination of the formic acid content from the difference between the two determinations. Is applicable to products having formic acid contents, between 0,02 % (m/m) and 0,35 % (m/m).
回到顶部
选择了条数据