This International Standard specifies a procedure (Doctor test) for the detection of thiols (mercaptans), hydrogen sulfide and elemental sulfur in hydrocarbon solvents and distillate petroleum feedstocks and products. Preliminary procedures also detect the presence of peroxides and phenolic substances, which, when present in more than trace quantities, make the application of this International Standard inappropriate. Carbon disulfide, at relatively high concentrations [above 0,4 % (m/m) sulfur], also interferes with the interpretation of the test by causing darkening of the aqueous layer. NOTE For the purposes of this International Standard, the term "% (m/m)" is used to represent the mass fraction of a material. The test is a go/no-go procedure with a threshold value of thiol concentration dependent on the material under test. It is frequently used as a substitute for the quantitative determination of thiol content.
DIN ISO 5275-2005由德国标准化学会 DE-DIN 发布于 2005-10。
DIN ISO 5275-2005 在中国标准分类中归属于: E30 石油产品综合,在国际标准分类中归属于: 71.080.15 芳香烃。
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