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NB/SH/T 0174-2015 English PDF (NBSHT0174-2015)

NB/SH/T 0174-2015 English PDF (NBSHT0174-2015)

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NB/SH/T 0174-2015: Petroleum products and hydrocarbon solvents – Detection of thiols and other sulfur species - Doctor test
This standard specifies the test methods of using Doctor reagent to qualitatively determine the thiols, hydrogen sulfide and elemental sulfur. This standard applies to hydrocarbon solvents and petroleum fractions (including intermediates and products). The initial test of this standard can also be able to detect the presence of peroxide and phenolic substances, BUT it is not applicable to the conditions when the peroxide and phenolic substances are greater than the trace. When the carbon disulfide content is too high (the mass fraction of sulfur content is more than 0.4%), it will cause the water phase darkening, which will interfere with this test.

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