Tetrabromophenolphthalein ethyl ester

A manual titrimetric method using methyl orange as indicator and sodium tetraphenylboron as titrant has been described [273]. Dodecyl sulfate at concentrations of approximately 10"5 M have been analyzed by a visual two-phase titration in the presence of dichloroethane and tetrabromophenolphthalein ethyl ester [274]. [Pg.282]

Tetrabromophenolphthalein Ethyl Ester-Silver Nitrate-Citric Acid Reagent... [Pg.213]

Dipping solution I Dissolve 0.1 g 3,3, 5,5 -tetrabromophenolphthalein ethyl ester potassium salt in 50 ml acetone [2]. [Pg.213]

Substances Tetrabromophenolphthalein ethyl ester potassium salt... [Pg.214]

Tetrabromophenolphthalein Ethyl Ester—Silver Nitrate—Citric Add (Duggan) 411... [Pg.249]

A multiwavelength approach might have been considered as an alternative to chemical derivatisation. Ruddle and Wilson [62] reported UV characterisation of PE extracts of three antioxidants (Topanol OC, Ionox 330 and Binox M), all with identical UV spectra and 7max = 277 nm, after reaction with nickel peroxide in alkaline ethanolic solutions, to induce marked differentiation in different solvents and allow positive identification. Nonionic surfactants of the type R0(CH2CH20) H were determined by UV spectrophotometry after derivatisation with tetrabromophenolphthalein ethyl ester potassium salt [34]. Magill and Becker [63] have described a rapid and sensitive spectrophotometric method to quantitate the peroxides present in the surfactants sorbitan monooleate and monostearate. The method, which relies on the peroxide conversion of iodide to iodine, works also for Polysorbate 60 and other surfactants and is more accurate than a titrimetric assay. [Pg.310]

Sakai et al. determined procaine by a colorimetric method that was proposed for the assay of procaine on the basis of solvent extraction [39]. Tetrabromophenolphthalein ethyl ester anion was added to an aqueous solution containing procaine, and the extract took on a red color (absorbance maximum of the extract at 580 nm). The optimal pH range for extraction of the drug from the aqueous solution was found to be 8-9. Procaine was found to form a 1 1 associated ion pair compound with the reagent in 1,2-dichloroethane. [Pg.431]

Tetrabromophenolphthalein ethyl ester [1176-74-5] M 662.0. Crystd from benzene, dried at 120° and kept under vacuum. v al... [Pg.330]

Sakai et al. reported the use of batchwise and flow-injection methods for the thermo-spectrophotometric determination of acetylcholine and choline with tetrabromophenolphthalein ethyl ester [39]. An aqueous sample... [Pg.69]

It may be noted that the acids (e.g. tetrabromophenolphthalein ethyl ester) and bases (e.g. tri-n-butylamine) used in this study are in general quite large. It would therefore be of some interest to attempt a correlation of the data with the Kurz model referred to above. [Pg.159]

C21H30O3 21-hydroxypregn-4-ene-3,20-dione 64-85-7 25.00 1.0205 2 33107 C22H14Br404 tetrabromophenolphthalein ethyl ester 1176-74-5 25.00 1.9236 2... [Pg.285]

Tetrabromophenolphthalein ethyl ester, potassium salt C22H,3Br4K04 62637-91-6 700.060 210 ... [Pg.590]

Tetrabromophenolphthalein ethyl ester 3 ,3",5 ,5"-Tetrabromophenolphthalein ethyl ester, potassium salt Tetrabutylammonium bromide... [Pg.591]

Y-B stilbenedisulfonic acid Tetrabromophenolphthalein ethyl ester. 0.1% in ethanol... [Pg.1210]

Sakai [26] developed an FI liquid-liquid extraction spectrophotometric method for the determination of berbehne and/or benzethonium in pharmaceutical preparations based on ion-association with tetrabromophenolphthalein ethyl ester (TBPE-H) and extraction of... [Pg.227]

Phenylazodiphenylanime 4-Phenylazo-I-naphthyIamine Propyl Red Qirinaldme Red Resazurin Resracin Blue Tetrabromophenolphthalein ethyl ester, potassiirm salt Thymol Blue Thymolphthalein 4-o-Tolylazo-o-tohridine... [Pg.1211]

Indicator, Potassium tetrabromophenolphthalein ethyl ester, 0.03% in ethanol. [Pg.203]

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