ASTM UOP 935 : 1994
Current
The latest, up-to-date edition.
Mercaptan Types In Kerosine by NMR
Hardcopy , PDF
English
29-07-2002
Important note : Users cannot be edited or removed once added to your Multi user PDF.Defines methods for determining primary, secondary and tertiary mercaptans (thiols) in kerosines up to several thousand mass-ppm, based on the procedure previously suggested by E. Rafii, et al. (1,2).
| DocumentType |
Standard
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| Pages |
16
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| PublisherName |
American Society for Testing and Materials
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| Status |
Current
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This method is for determining primary, secondary and tertiary mercaptans (thiols) in kerosines up to several thousand mass-ppm, based on the procedure previously suggested by E. Rafii, et al. (1,2). The lower limit of detection by 119Sn {H} decoupled, refocused Insensitive Nucleus Enhancement by Polarization Transfer (INEPT) Nuclear Magnetic Resonance (NMR) spectroscopy without preconcentration is 40 mass-ppm per mercaptan type in the kerosine. Lower concentrations can be determined using a specified distillation procedure. The only known interferences are thiophenols and branched alcohols, such as isopropyl and butyl alcohols (see NOTE). The method relies upon the quantitative preparation of soluble tri-n-butyl tin derivatives of all of the thiols present.
| ASTM UOP 163 : 2010 | Hydrogen Sulfide and Mercaptan Sulfur in Liquid Hydrocarbons by Potentiometric Titration |
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