UOP 935 – Mercaptan Types In Kerosine by NMR
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. (12). 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.
Product Details
- Published:
- 01/01/1994
- Number of Pages:
- 16
- File Size:
- 1 file 260 KB
