Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

1,2-Naphthoquinone-4-sulfonic acid

Dissolve 100 mg l,2-naphthoquinone-4-sulfonic acid sodium salt in 40 ml ethanol and add 20 ml perchloric acid (70%), 18 ml water and 2 ml formaldehyde solution in that order. [Pg.351]

Naphthoquinone-4-sulfonic Acid- Perchloric Acid - Formaldehyde Reagent... [Pg.352]

Naphthoquinone-4-sulfonic Acid-Perchloric Acid-Formaldehyde Reagent 353... [Pg.353]

Spray solution For amino acids Dissolve 0.2-0.3 g l -naphthoquinone-4< sulfonic acid sodium salt in 100 ml aqueous sodium carbonate solution (5-10%) [1]. [Pg.169]

For aromatic amines Dissolve 0.5 g 1 -naphthoquinone-4 sulfonic acid sodium salt in 95 ml water and treat with 5 ml glacial acetic acid [1,6] if necessary, filter off the insoluble part [1],... [Pg.169]

For aliphatic amines Dissolve 0.6 g l,2-naphthoquinone-4-sulfonic acid sodium salt in 12 ml water, make up to 200 ml with ethanol (90%) and add 10 ml pyridine [8]. [Pg.169]

In the case of diuretics the chromatogram is Erst sprayed with sodium hydroxide solution (c = 1 mol/L) and then with a saturated solution of l,2-naphthoquinone-4-sulfonic acid sodium salt in ethanol — water (50-1-50) [11]. Stable orange-colored chromatogram zones appear over a period of ca. 15 min, their intensity increases on storage in the dark (1-2 days) [11]. [Pg.169]

Substances l,2-Naphthoquinone-4-sulfonic acid sodium salt... [Pg.410]

Al-Ghannam et al. [25] described a simple fluorimetric procedure for determination of three pharmaceutical compounds containing thiol groups, including penicillamine. In this method, the drugs are treated with 1,2-naphthoquinone-4-sulfonic acid. The later compound is reduced to l,2-dihydroxynaphthalene-4-sulfonic acid, which is measured fluorimetrically (excitation = 318 nm, emission = 480 nm). The method is sensitive to 0.5 1.5 pg/mL, with a detection limit of 0.05 pg/mL (S/N = 2). [Pg.137]

C10H8N2O5S 1,2-Naphthoquinone-4-sulfonic acid dioxime Ebchaction-photometric Co, Cu, Fe, Ni 3... [Pg.538]

Salama and Omar have described a rapid, specific, and convenient colorimetric method for the determination of procaine hydrochloride in pharmaceutical preparations [40]. The method is based on an intensity measurement of the orange-red color developed when the drug is allowed to react with l,2-naphthoquinone-4-sulfonic acid (sodium salt) in an aqueous solution. The method is suited for routine analysis of official preparations of procaine. [Pg.431]

Cetin and Atmaca [41] reported HPLC analysis of vigabatrin in tablets by precolumn derivatization with l,2-naphthoquinone-4-sulfonic acid sodium salt and detected at 451 nm. Separation was achieved on a Shim-Pack CLS-ODS (5 /im) column (25 cm x 4 mm) with a mixture of 10 mM phosphoric acid-acetonitrile (75 25) as a mobile phase (flow rate... [Pg.336]

Cetin and Atmaca [42] also reported HPLC analysis of vigabatrin in human plasma and urine after precolumn derivatization with l,2-naphthoquinone-4-sulfonic acid sodium salt using UV-VIS detection... [Pg.336]

Naphthoquinone-4-sulfonic acid, sodium salt (0.5% in 1 Nacetic acid) Ninhydrin... [Pg.204]

Naphthoquinone-4-sulfonic acid/perchloric acid Pink spots that change to blue upon prolonged heating (cholesterol limit 0.03y) 65,101... [Pg.209]


See other pages where 1,2-Naphthoquinone-4-sulfonic acid is mentioned: [Pg.444]    [Pg.351]    [Pg.16]    [Pg.168]    [Pg.169]    [Pg.169]    [Pg.170]    [Pg.171]    [Pg.411]    [Pg.412]    [Pg.678]    [Pg.678]    [Pg.742]    [Pg.904]    [Pg.905]    [Pg.91]    [Pg.637]    [Pg.215]    [Pg.97]    [Pg.444]    [Pg.874]    [Pg.538]    [Pg.184]   
See also in sourсe #XX -- [ Pg.97 ]

See also in sourсe #XX -- [ Pg.2 , Pg.3 , Pg.4 , Pg.5 , Pg.6 , Pg.7 , Pg.8 , Pg.9 , Pg.10 , Pg.11 , Pg.12 , Pg.13 , Pg.14 , Pg.15 , Pg.16 , Pg.17 , Pg.18 , Pg.19 ]




SEARCH



1 : 4-Naphthoquinone

1,2-Naphthoquinone-4-sulfonic acid 2-semicarbazone

1,2-Naphthoquinone-4-sulfonic acid reagent

L,2-Naphthoquinone-4-sulfonic acid

Naphthoquinone-4-sulfonic Acid (Folin)

© 2024 chempedia.info