Ammonium, tetrabutyl tetrapropyl

Guanidinium- Piperidi- nium- Tetramethyl- ammonium- Tetraathyl- ammonium- Tetrapropyl- ammonium- Tetrabutyl- ammonium- Tributyl- ammonium- ... 

Benzyl trimethyl ammonium hydroxide Cetrimonium bromide Dimethyl diallyl ammonium chloride Laurtrimonium bromide Laurtrimonium chloride Methyl tributyl ammonium chloride Tetrabutyl ammonium bromide Tetrabutyl ammonium chloride Tetrabutyl ammonium fluoride Tetra-n-butyl ammonium hydrogen sulfate Tetra-n-butyl ammonium hydroxide Tetrabutyl ammonium iodide Tetrabutylphosphonium acetate, monoacetic acid Tetrabutylphosphonium bromide Tetrabutylphosphonium chloride Tetraethylammonium bromide Tetraethylammonium hydroxide Tetrakis (hydroxymethyl) phosphonium chloride Tetramethylammonium bromide Tetramethylammonium chloride Tetramethylammonium hydroxide Tetramethyl ammonium iodide Tetraphenyl phosphonium bromide Tetrapropyl ammonium bromide Tetrapropyl ammonium iodide Tributylamine Tributyl phosphine Tributyl (tetradecyl) phosphonium chloride Trioctyl (octadecyl) phosphonium iodide catalyst, phase-transfer Tetraethylammonium chloride Tetraoctylphosphonium bromide Tri-n-butyl methyl ammonium chloride Tri methyl phenyl ammonium hydroxide catalyst, phenolics Triethylamine... 

Mobile-phase modifiers. The modifiers that have been used with the AGP CSP encompass uncharged and charged compounds and include 2-propanol, N,N-dimethyIoctyIamine, tetrapropyl- and tetrabutyl-ammonium bromide, and octanoic acid (see Fig. 12). The addition of these modifiers to the mobile phase usually results in a decrease in the retention of solutes, with an accompanying decrease in enantioselectivity (a). However, in some instances, the addition of a modifier results in an increase in a. 

Cationic surfactants = (def) Quaternary ammonium compounds that are major components in industrial and commercial formulations such as cosmetics, textile softeners, and pharmaceuticals (e.g., tetramethyl, tetrapropyl, tetrabutyl, dodecyl, cetyltrimethyl, and myristyltrimethylammonium). Chlorinated hydrocarbons = (def) (1) Chemicals containing only chlorine, carbon, and hydrogen. These include a class of persistent, broad-spectrum insecticides that linger in the environment and accumulate in the food chain. Among them are DDT, aldrin, dieldrin, heptachlor, chlordane, lindane, endrin, Mirex, hexachloride, and toxap-hene. Other examples include TCE, used as an industrial solvent. (2) Any chlorinated organic compound including chlorinated solvents such as dichloromethane, trichloromethylene, chloroform. 

Figure 5.3 Water content of (a) Nafion 117, (b) Flemion F-1.44 and (c) Flemion F-1.8 membranes of various ionic forms. Abbreviations used for alkyl ammonium ions are TMA, TEA, TPrA, TBA for tetramethyl, tetraethyl, tetrapropyl and tetrabutyl ammonium ions, respectively (Reprinted with permission from Asaka, K., Fujiwara, N., Oguro, K. et al. State of water and ionic conductivity of solid polymer electrolyte membranes in relation to polymer actuators, J. Electroanalytical Chem., 505 (1 2), 24-32. Copyright (2001) Elsevier).

---