Tetrapentylammonium bromide

Tetrapentylammonium bromide [866-97-7] M 378.5, m 100-101°. Crystd from pet ether, benzene or acetone/ether and dried in vacuum at 40-50°. 

Polyamino acids or + tetrapentylammonium bromide Poly-L-proline (related to fish antifreeze protein) RF (Rogaland Research) ... 

Tetrabutylammonium bromide-quaternary ammonium surfactants Tetrapentylammonium bromide-quaternary ammonium surfactants For example, tributylammonium or tripentylammonium (better) headgroup Quaternary ammonium surfactants - >2 w-butyl, w-pentyl, isopentyl groups Replacing 1 or 2 small alkyl groups with long hydrophobic tail (8—18 carbon atoms)... 

Tetrapentylammonium bromide See tetra- -amylammonium bromide above. 

Mobile phase MeCN buffer water 200 3S 762, containing 3.S g/L tetrapentylammonium bromide (Buffer was 500 mL of 0.5 M Na2HP04 adjusted to pH 7.8 with about 50 mL 0.5 M NaH2P04.)... 

Tetramethylammonium bromide (or hydrogen sulfate) Tetraethylammonium bromide (or hydrogen sulfate) Tetrapropylammonlum bromide or hydrogen sulfate) Tetrabutylammonlum bromide (or phosphate, iodide) Tetrapentylammonium bromide Tetrahexylammonium bromide (or hydrogen sulfate) Tetraheptylammonlum bromide Tetraoctylammonium bromide Hexadecyltrimethyl ammonium hydroxide (or bromide, or hydrogen sulfate) Decamethylenebis (trlmethylammonium bromide)... 

Cyanide and thiocyanate anions in aqueous solution can be determined as cyanogen bromide after reaction with bromine [686]. The thiocyanate anion can be quantitatively determined in the presence of cyanide by adding an excess of formaldehyde solution to the sample, which converts the cyanide ion to the unreactive cyanohydrin. The detection limits for the cyanide and thiocyanate anions were less than 0.01 ppm with an electron-capture detector. Iodine in acid solution reacts with acetone to form monoiodoacetone, which can be detected at high sensitivity with an electron-capture detector [687]. The reaction is specific for iodine, iodide being determined after oxidation with iodate. The nitrate anion can be determined in aqueous solution after conversion to nitrobenzene by reaction with benzene in the presence of sulfuric acid [688,689]. The detection limit for the nitrate anion was less than 0.1 ppm. The nitrite anion can be determined after oxidation to nitrate with potassium permanganate. Nitrite can be determined directly by alkylation with an alkaline solution of pentafluorobenzyl bromide [690]. The yield of derivative was about 80t.with a detection limit of 0.46 ng in 0.1 ml of aqueous sample. Pentafluorobenzyl p-toluenesulfonate has been used to derivatize carboxylate and phenolate anions and to simultaneously derivatize bromide, iodide, cyanide, thiocyanate, nitrite, nitrate and sulfide in a two-phase system using tetrapentylammonium cWoride as a phase transfer catalyst [691]. Detection limits wer Hi the ppm range. 

Fig. 7.3 Cross-reactivity of NMBD-reactive IgE antibodies with quaternary ammonium compounds. Inhibition by tetraalkylammonium and alkyltrimethylammonium salts of the binding of alcuronium-reactive IgE antibodies to an alcuronium-solid phase conjugate. The serum was from a patient who experienced anaphylaxis to alcuronium and is the same serum used in experiments summarized in Figs 7.1 and 7.2. Key alcuronium plus sign) tetrameth-ylammonium bromide (open circle), tetrapropylammo-nium bromide filled square) , tetrapentylammonium...

Figure 2.11. The influence of added salt on response curves for tetrapentylammonium (TPA) bromide in methanol. The relationship between response and added sodium concentration can be observed by comparing the TPA response (Rtpa) at a given concentration (i.e., 10 M) in solutions with various amounts of Na ). The...

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