Quinalizarin

Chin-alizarin, n. quinalizarin. amin, n. quin-amine. 

Wool dyed with Rubia tinctorum and Galium verum Alizarin, quinalizarin, purpurin, xanthopurpurin, purpuroxanthin dimethyl ether, munjistin, rubiadin, nordamnacanthal, anthragallol, kermesic acid, hystazarin, emodin, quinizarin HCI/MeOH/ h2o A H20 B ACN with AcOH or FA 250 nm/ESI ( ) HPLC optimization... 

Analysis. Be can be quantitatively determined by colorimetry down to 40 ppb using eriochrome cyanine R or acetylacetone. The sensitivity may be improved by electrothermal absorption spectroscopy (ETAS) to 1 ppb and to 0.1 ppb by inductively-coupled plasma emission spectroscopy (ICPES) or inductively-coupled plasma mass spectroscopy (ICPMS). A simple spot test for qualitative detection of Be is one with quinalizarin in alcoholic NaOH which can detect 3 ppm. The color is produced by both Be and Mg. If the color persists after the addition of Br2 water. Be is present. If the color is bleached. Mg is indicated. 

Quinalizarin [81-61-8] M 272.2, m 275 . Crystd from acetic acid or nitrobenzene. It can be sublimed under vacuum. 

Aluminon, haematoxylin, eriochiome cyanine B, alizarin S, quinalizarin, oxine,b morin,c pontachrome blue black Rc... 

Eriochrome black T, oxine,b xylidyl blue, HQBA,b quinalizarin ... 

Aluminon (a solution of the ammonium salt of aurine tricarboxylic acid) Quinalizarin, alizarin-S, alizarin Chromium (III), Cr3 Ammonia solution... 

Quinalizarin Sodium (1), Na+ Blue precipitate or blue-colored solution, which can be cleared by a few drops of bromine-water... 

Amberlite XAD-2, functionalized by coupling to quinalizarin [1,2,5,8-tetrahydroxyanthraquinone] by an -N=N- spacer Lignin derivatized with methyl thio ether functional groups... 

Ethinyl estradiol, buprenorphine ferulic acid, genistein naltrexone (low), naloxone (low), SN-38 (active metabolite of irinotecan) alizarin, quinalizarin, retigabine Bilirubin, chloropheno- Atazanavir, indinavir, xypropionic acid, chrysin, ketoconazole (AT, = 3 pM) clofibrate, 3-MC, oltipraz, phenylpropionic acid, phenobarbital, clotrimazole, rifampin, and St. John s wort. WY-14643 Response elements for AhR, CAR, GR, PPAR-a, PXR, Nrf2 (antioxidant response element) have been identified... 

Quinalizarin (= 1,2,5,8- Semi-synthetic from Alizarin HIV-1 INT (CDPK, MLCK,... 

Place a drop of the test solution upon the reagent paper hold it for a short time over a bottle containing concentrated ammonia solution and then over glacial acetic acid until the blue colour (ammonium quinalizarinate) first formed disappears and the unmoistened paper regains the brown colour of free quinalizarin. A red-violet or red spot is formed. 

The reagent paper is prepared by soaking quantitative filter paper in a solution obtained by dissolving 0 01 g quinalizarin in 2 ml pyridine and then diluting with 18 ml acetone. 

Quinalizarin reagent blue precipitate or cornflower-blue colouration with magnesium salts. The colouration can be readily distinguished from the blue-violet colour of the reagent. Upon the addition of a little bromine water, the colour disappears (difference from beryllium). The alkaline earth metals and aluminium do not interfere under the conditions of the test, but all elements of Groups I to III should be removed. Phosphates and large amounts of ammonium salts decrease the sensitivity of the reaction. 

The reagent is prepared by dissolving 0-01-0 02 g quinalizarin in 100 ml alcohol. Alternatively, a 0 05 per cent solution of 01m sodium hydroxide may be used. 

Quinalizarin reagent cornflower-blue colouration with faintly alkaline solutions of beryllium salts. The reagent alone gives a characteristic violet colour with dilute alkali but this is quite distinct from the blue of the berryllium complex a blank test will render the difference clearly apparent. 

In adjacent depressions of a spot plate place a drop of the test solution and a drop of distilled water, and add a drop of the freshly prepared quinalizarin reagent to each. A blue colouration or precipitate, quite distinct from the violet colour of the reagent, is obtained. 

Separation. Beryllium is precipitated in Group IIIA. It is ultimately associated with aluminium in solution as tetrahydroxoaluminate and tetrahydroxoberyllate respectively. Upon diluting and boiling, only the Be(OH)2 is precipitated. Alternatively, the quinalizarin test, 7, may be applied to the solution or the basic acetate-chloroform test, 6, to the mixed hydroxides. Beryllium may also be detected in the presence of aluminium by the acetylacetone test, 9 this is specific for Be. 

Quinalizarin (0-05 %, in NaOH). Dissolve 0-05 g quinalizarin in a mixture of 50 ml water and 5 ml 2m sodium hydroxide. Dilute the solution with water to 100 ml. 

Quinalizarin (0 05%) in pyridine. Dissolve 0-01 g quinalizarin (1,2,5,8-tetrahydroxyanthraquinone) in 2 ml pyridine, and dilute the solution with acetone to 20 ml. 

Sulphonated Alizarin Complexone [32-35], and the related reagent Quinalizarin Complexone [36] have also been suggested for determining fluoride. The use of Quinalizarin Complexone increases the sensitivity by about 50%. Traces of fluoride have been pre-concentrated on anion exchange resin impregnated with Alizarin Complexone [37]. 

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