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  • ISO 8916-1988 - 中外标准 - - 1988/12 - 废止
    Specifies a method of sampling by scrubbing at dry ice temperature (195 K). Permits the concentration of traces of all the less volatile polar compounds (water, alcohols, esters, acids, amines, etc.) in a small amount of liquid phase practically without any interference due to adsorption phenomena on the relatively small internal surfaces of the scrubbing absorber. This sampling technique permits the exact determination of all these polar compounds at contents greater than 0.01 mg/m^3, at normal temperature and pressure. Is also applicable to the determination of hydrocarbons with a higher boiling point (for example traces of oil in ethylene).
  • ISO 8917-1988 - 中外标准 - - 1988/12 - 废止
    Gives methods for the determination of water using an analyzer with an in-line sensor in gaseous flows of the substance to be analyzed. Compiles the various principles of working of the most generally used commercial analyzer like electrolytic decomposition - light reflection on a cooled mirror (dew-point) - modification of vibration frequency of a quartz crystal covered with a hygroscopic layer - variation of the capacity of a capacitor formed by a hygroscopic dielectric polymer and two porous electrodes - infrared spectrometry - Micro-wave absorption measurement - variation of the capacity of a capacitor consisting of an aluminium oxide dielectric covered by an evaporated porous gold film.
  • CGSB 3-GP-525MA-1988 - 中外标准 - - 1988/9 - 现行
  • CNS 12300-1988 - 中外标准 - - 1988/5 - 废止
    氯甲苯有机颜料规范
  • SH/T 1478-1992(2000) - 中外标准 - - 1988/5 - 废止
  • SH/T 1477-1992(2000) - 中外标准 - - 1988/5 - 废止
  • ISO 8661-1988 - 中外标准 - - 1988/5 - 现行
    The volatile bases are distilled in alkaline medium under specified conditions and collected in a known volume of a standard volumetric hydrochloric acid solution in the presence of an indicator. The excess of the acid is titrated with a standard volumetric sodium hydroxide solution.
    容量分析挥发物质滴定法含量测定材料化学分析和试验化学分析已内酰胺己内酰胺CaprolactamChemical analysis and testingDetermination of contentMaterialsTitrationVolumetric analysis
  • CNS 12279-1988 - 中外标准 - - 1988/4 - 现行
    萘酚磺酸钠有机化合物有机颜料
  • CNS 12278-1988 - 中外标准 - - 1988/4 - 废止
    硝基化合物甲醇盐有机颜料
  • CNS 12277-1988 - 中外标准 - - 1988/4 - 现行
    钠有机化合物磺酸盐化合物氯甲苯苯胺
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