Fast Blue Salt B Reagent

Fast Blue Salt B Reagent 289 Spray solution II Caustic soda solution (c = 0.1 mol/1)... 

It is also probable that there is coupling to colored derivatives in the case of aromatic amines and phenols (cf. Fast blue salt B reagent). 

Fast Blue Salt B reagent then grayed with 36% hydrodiloric acid, observing colour changes. 

No hRf Substance UV2S4 Fast blue salt B-reagent Anisaldehyde-sulfuric acid-reag. o-Dianisidine-reg. ... 

Note The detection is not affected if the dipping solution exhibits a slight opalescent turbidity. Fast blue salt BB [18] or fast blue salt RR [18,19] can be employed in the reagent in place of fast blue salt B. It is occasionally preferable not to apply spray solutions I and II separately but to work directly with a 0.1% solution of fast blue salt B in caustic soda solution (c=l—2mol/l) [13, 15] or in 0.5% methanolic caustic potash [3]. 

Fast blue salt B, fast blue salt BB, fast black salt K, diazotized sulfanilic acid (Pauly s reagent), diazotized sulfanilamide or 4-nitroaniline... 

Phenols (capable of coupling) Fast blue salt B, fast blue salt BB, fast black salt K, diazotized sulfanilic acid (Pauly s reagent) diazotized sulfanilamide or 4-nitroaniline Intensely colored azo dyes are formed. Catecholamines [20, 3S], imidazoles [21] and amines capable of coupling also react. [3, 17]... 

The reagent solutions should always be freshly made up and fast blue salt B should always be stored in the refrigerator. 

Aqueous or methanolic ferric chloride is a general spray reagent for phenolic compounds and gives a blue-black coloration with flavonoids. Similarly, Fast Blue Salt B forms blue or blue-violet azo dyes. 

Reagent for Substances Fast blue salt B Methanol... 

Phenols can be detected with Fast Blue Salt B, diazo-tized orthanilic acid or dianisidine, alkaline chloramine T reagent, by spraying an ammoniacal silver nitrate solution, followed by exposure to UV light, or with a modified potassium ferricyanide-ferric chloride reagent, and also by exposing the wet layer successively to nitrogen dioxide (Cu + HNO3) and ammonia vapors. 

Detection A Natural producte-polyethylene glycol reagent (NP/PEG No. 28) -B Fast blue salt reagent (FBS No, 15) vis... 

Cobalt (II) thiocyanate Diazotization and a-naphthol coupling Ehrlich reagent Fast Blue B Salt... 

In analysis of the primary cannabinoids (A9-tetrahydrocannabinol, cannabidiol, and cannabinol) in marijuana samples Cannabis saliva L.), diverse eluent systems have been described in the literature for use in chromatographic runs, such as ethyl acetate methanol water concentrated ammonium (12 5 0.5 1), toluene chloroform (7 3), and n-hexane diethyl ether (80 20) [1]. The detection of cannabinoids can be accomplished using diverse diazonium salts, such as Fast Blue B, or with Duquenois-Levine reagent (Table 16.1) [2], The limit of detection (LQD) varies from 2 to 10 ng mL (Figure 16.1). 

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