Photometric and Visual Titration of Certain Alkaloids in Glacial Acetic Acid Using Malachite Green as Indicator

Spectroscopic characterization of acid generation and concentration and free volume evolution in chemically amplified resists

“…[15][16][17][18][19][20][21] The three dimethylamino groups serve as the sites for protronation and deprotonation for this molecule. 22 The extent of protonation of these sites is reflected in the steady state absorption spectrum of crystal violet. The native form of crystal violet (CV ϩ ) has its prominent electronic transition centered near 590 nm.…”

Acids

“…Acetamide, 214 metallic acetates, 58,62,108 * 198 isonicotinic acid, 183 nicotinic, 39 and /7-aminosalicylic 75 acids, alkaloids, 55,56,79,96,133,147,152,153,211,218 tobacco alkaloids, 106 aldehydes after oxime formation, 143 amides, 15,234 various amines, 6,47,72,114,148,178,199 aminoacids, 3,10,11,17,77,100 aminoacridines, 204 aminopyrine 122,191,207 /?-aminosalicylate, 75 aminotriazoles, 164 anaesthetics, 101 157 antibiotics, 76 antihistamines, 60,122,124,135 antipyrine, 95,160,214,225 antodril, 102 arecoline, 19,55 arginine, 17 asparagine, 77 atropine and derivatives, 22, 177,204 aureomycin, 76 basic nitrogen in hydrocarbons. 26,127,128 Barbiturates, 94 17 N, 7V-diethylnico t inamide, 2 x ° N, iV'-dimethyl hydrazine, 2 2 7 N, 7V-dimethy 1aniline, 20,221 dimethylpyrine, 214 dramamine.…”

“…26,127,128 Barbiturates, 94 17 N, 7V-diethylnico t inamide, 2 x ° N, iV'-dimethyl hydrazine, 2 2 7 N, 7V-dimethy 1aniline, 20,221 dimethylpyrine, 214 dramamine. 150 Ion exchangers, 166 144 phtivazide, 190 phytostigmine, 55 S-alkylthiouronium picrates, 74 amine picrates, 84,86,172,173 dialkylsulphoniumpicrates, 145 4-mercapto-pyridine picrates, 132 pilocarpine, 40 piperazines, 165 polypeptides, 3,10 procaine, 40 purines, 66 pyrazinamide, 136 76 tetraphenylborates of sparingly soluble organic bases, 1 3 3 ' 1 4 7 , 1 8 4 thebaine, 218 theobromine, 129 theophylline, 184 tryptophan, 17 thiourea, 129 ' 214 oxime/7-toluenesulphonates; 180 urea 1 2 9 , 2 1 4 and derivatives; 160 alkyl xanthogens. 54 Titrations in the Presence of Mercuric Acetate 2RX + Hg(OAc)!…”

“…aminoacetic tincture,149 ephedrine,204 quinine ethylcarbonate, 154 ethylenediamine; 144 gelatins,11 glycines, 77 amino-fats,47 guanidines,115 ; harmine,22 histamine,40 histidine, 40 hydrazides; 52,59,73,156 ilotycine, 76 imidazolidines, 143 lacquers, 99 lobeline; 22 magnamycine, 76 various medicaments, 61 mephedrine, 121,136 meprobamate, 212 methimazoles, 185 methylhexylamine,148 JV-methylpyrrolidone,163 morphine and derivatives.123,218,226 Narcotine,171,179,218 narcotics, 79 nicotinamide 39,187 nicotinates, 36,39 nicotine,23,24,39 alkali nitrates,40,181 nitranilines; 220 alkene oxides, 15 oximes,138 oxinates ; 140 papaverine, 2 x 8 phenanthroline, x44 phenazone, 172 ■ 173 pheny 1hydrazine,…”

Titrations in Nonaqueous Solvents

“…A certain number of papers have also appeared on the titration of alkaloids and pharmaceuticals. These include visual titration of codeine, morphine, narcotine, and papaverine (116) in acetic acid, and the salts of the alkaloids by a photometric technique (4) • Ellert, Jasinski, and Pawelczak (20) have used propionic acid-propionic anhydride as the solvent medium for the visual titration of phenazone, caffeine, and theophylline with perchloric acid. Results using a number of indicators are given.…”