NB/SH/T 0174-2015 Translated English of Chinese Standard (NBSHT 0174-2015, NB/SHT0174-2015, NBSH/T0174-2015): Petroleum products and hydrocarbon solvents - Detection of thiols and other sulfur species - Doctor test [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]https://www.chinesestandard.net, 2017/02/27 - 12 ページ 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. |
多く使われている語句
5.13 Lead acetate 50 g/L sodium acetate test paper acetic acid solution adding sulfur and/or elemental sulfur becomes milky white black precipitate cadmium chloride solution chloride solution 5.7 color developing conditions cylinder for 15 elute FOLLOW the operation FOLLOW the provisions g/L sodium bicarbonate GB/T glacial acetic acid Hydrochloric acid hydrogen sulfide initial test lead acetate test mass fraction Measuring cylinder mixed solution mixing cylinder 6.1 mL of cadmium mL of sample mL of water operation procedures oscillating as specified peroxide and phenolic plumbite becomes milky plumbite solution 5.4 Positive fail potassium iodide solution precipitate is formed procedures of 8.1.2 procedures of clause re-take 20 mL report as Invalid report as Positive sample and sodium separatory funnel SHAKE the mixing sodium hydroxide sodium plumbite becomes sodium plumbite solution sodium sulfide solution of sample specified in 8.1.2 specified in 8.4 sulfur as specified thiol and/or elemental Violently SHAKE white after oscillating