In a preceding study, 4,4-dithiodipyridine (DTDP) was shown to be superior to 5,5-dithio-bis(2-nitrobenzoic acid) (Ellman's reagent) for spectrophotometric measurement of thiol groups in aqueous solution. (i) Sensitivity is higher because a larger absorbance increase is seen at a given thiol concent
โฆ LIBER โฆ
Measurement of mercaptans in gasoline
โ Scribed by Lei, Wei ;Dasgupta, Purnendu K. ;Matza, Steve D. ;Olson, Don C.
- Publisher
- Springer-Verlag
- Year
- 1989
- Weight
- 422 KB
- Volume
- 99
- Category
- Article
- ISSN
- 0344-838X
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## Abstract A general procedure for the selective preconcentration and purification of mercaptans has been developed. Mercaptans are strongly retained in a small (20โmg) SPE cartridge containing __pโ__hydroxymercurybenzoate. The cartridge can then be rinsed with relatively high volumes of polar (wa