ISO 6382-1981 - 中外标准 - - 1981/11 - 废止
Specifies a method based on the depolymerization of any polymerized silica by treatment with sodium fluoride in the presence of hydrochloride acid resulting in the formation of the oxidized molycdosilicate, followed by the selective reduction of this complex in the presence of oxalic acid and in a sulphuric acid medium, and spectrophotometric measurement of the blue-coloured complex at the wavelength corresponding to maximum absorption (about 800 nm).
校正试验分光光度法分光光度测量分析化合物含量测定连接硅CalibrationConnectionsDetermination of contentSiliconSpectrophotometryTestingTests
ISO 1995-1981 - 中外标准 - - 1981/11 - 现行
These products are similar to petroleum products; many sampling procedures used for petroleum products are equally applicable to the former. Specifies the obtaining of samples from fixed tanks, railcars, road vehicles, barges and drums and from liquids being pumped in pipelines. The samples are intended to be used determine quality, for testing whether contaminants are present and for the determination of the degree of homogeneity of a batch. General recommendation and specific recommendations for hazardous, flammable and toxic substances are given and also the treatment of mobile liquids at low ambient temperatures is indicated.
加标签安全要求抽样方法烃类定义采样设备芳烃词汇抽样Aromatic hydrocarbonsDefinitionsHydrocarbonsLabelling (process)Safety requirementsSamplingSampling equipmentSampling methodsVocabulary
CNS 8033-1981 - 中外标准 - - 1981/10 - 现行
CNS 7539-1981 - 中外标准 - - 1981/6 - 废止
ISO 6143-1981 - 中外标准 - - 1981/6 - 作废
CNS 7403-1981 - 中外标准 - - 1981/5 - 现行
CNS 7163-1981 - 中外标准 - - 1981/3 - 现行