Oracet blue

Oracet Blue B (0.5% in glacial acetic acid) Blue Purple Pink... 

Phenindamine tartrate 0.8 g Oracet Blue B Each ml of 0.1 N HC104 = 0.04115 g of c19h19n, c4i i6o6... 

Perchloric acid is the strongest of the common acids in acetic acid solution and the titration medium usually used for non-aqueous titration of bases is perchloric acid in acetic acid. Addition of acetic anhydride, which hydrolyses to acetic acid, is used to remove water from aqueous perchloric acid. Weak bases compete very effectively with acetic acid for protons. Oracet blue, quinalidine red and crystal violet (very weak bases) are used as indicators in this type of titration. A typical analysis is shown in Figure 3.8 for LDOPA. 

B) Non-aqueous titration with 0-lN perchloric acid using (a) crystal violet (I ) oracet blue B (c) quinaldine red (d) potentiometric endpoint (see pp. 792 and 864). 

Phenylephrine hydrochloride can either be determined as in the B.P. by addition of excess of O IN bromine in the presence of hydrochloric acid and back-tit ration with 0-lN thiosulphate after fifteen minutes standing and addition of potassium iodide, 1 ml O IN bromine = 0-003395 g or, preferably, by non-aqueous titration with 0-lN perchloric acid in the presence of mercuric acetate (see p. 792) to oracet blue indicator. 1 ml 0-1N perchloric acid 0 02037 g. 

Dissolve about 0 5 g in 40 ml of water in a separator, add 2 ml of 20 per cent sodium hydroxide solution and extract immediately with successive quantities of 25, 10 and 10 ml of chloroform. Wash each extract with the same 15 ml of water and filter into a dry fiask. Titrate the combined filtrates, which should be clear and free from droplets of water, with 0 05N perchloric acid using 0 15 ml of oracet blue B solution as indicator. 1 ml 0 05N - 0 01419 g Ci5H2i02N,HCl. 

Dissolve about 0-7 g in 20 ml of water in a separator and add 0 8 ml of dilute hydrochloric acid and 8 ml of 10 per cent potassium iodide solution. Mix well and extract with three 30-ml quantities of chloroform, collecting the extracts in a dry beaker. Stir, allow to stand for five minutes and then pour the chloroform solution into a dry conical flask, avoiding transference of aqueous droplets. Rinse the beaker with two 4-ml quantities of chloroform, adding the rinsings to the main chloroform solution, again avoiding the transference of aqueous droplets and then add 12 ml of a 5 per cent solution of mercuric acetate in glacial acetic acid, 0 2 ml of oracet blue B indicator and 0 5 ml of acetic anhydride. Titrate with... 

Crystal violet 2 - N aphtholbenzein Oracet blue B Quinaldine red... 

Zare, H.R., et al., Voltammetric studies of an oracet blue modified glassy carbon electrode and its application for the simultaneous determination of dopamine, ascorbic acid and uric acid. J. Electroanal. Chem., 2006. 589 p. 60-69. 

C.I. 64500 CIBACET SAPPHIRE BLUE G C.I. DISPERSE BLUE 1 CILLA BLUE EXTRA C.I. SOLVE.NT BLUE 18 DIACELLITON FAST BLUE R DISPERSE BLUE NO 1 DURANOL BRILLIANT BLUE CB FENACET BLUE G GRASOL BLUE 2GS IFAST BLUE BR MICROSETILE BLUE EB MIKETON FAST BLUE NACELAN BLUE G NCI-C54900 NEOSETILE BLUE EB NYLOQUINONE BLUE 2J ORACET SAPPHIRE BLUE G PERLITON BLUE B SERINYL BLUE 2G SUPRACET BRILLIANT BLUE 2GN... 

Silicon nitride coated CNT-templated UTLC plates were employed for analyte detection via DESI-MSI and direct analysis in real-time mass spectrometry (DART-MS) after chromatography. Rhodamine B (m/z 443.2 M+) and Basic Blue 7 (m/z 478.3 M ) were desorbed with methanol as spray solvent at 0.003 mL min within 45 min for scanning an 85-mm plate section (Figure 9.9). Dimethyl Yellow (m/z 226 [M-i-H]+), Oracet Red G (m/z 238 [M-i-H]+), Solvent Blue 35 (m/z 351 [M-t-H]+), Sudan Red G (m/z 279 [M-i-H]+), and Solvent Blue 22 (m/z 305 [M-i-H]+) were detected within 3.5 min with a snbstantially optimized interface for HPTLC-DART-MS applying a helium flow of 3 L min at 500°C (Figure 9.10) [2]. 

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