1, 2-naphthoquinone-4-sulphonate

Naphthoquinone-4-sulphonic acid sodium salt see 3,4-dihydro-3,4-dioxo-l-naphthlene sulphonic acid sodium salt. 

Na-1,2-naphthoquinone-4-sulphonate 4- zinc acetate + quinoline 4,5-Diacetyl-cyclohexene-(l) Chlorine/tolidme... 

Location Reagents. For Systems TL and TM. Naphthoquinone sulphonate solution. Spray the plate with the reagent, then spray with a 10% v/v solution of hydrochloric acid and heat at 110° for 20 minutes. 

Naphthoquinone Sulphonate Solution dissolve 0 3 g of sodium l,2-naphdioqumone-4-sulphonate m 100ml of ethanol water (1 1)... 

Ionization was also achieved in cationic micelles in the presence of the electron scavenger naphthoquinone sulphonate adsorbed at the periphery of the micelle. In the absence of scavenger the probability of geminate ion recombination is high and therefore the photoionization efficiency is low. 

S-Naphthoquinone Sulphonate, 10 per cent. General reagent for proteins and amino acids. 

Falco P, Cabeza A, Legua C, Kohhnann M. 1996. Amphetamine and methamphetamine determination in urine by reversed-phase high-performance liquid chromatography with simultaneous sample clean-up and derivatization with naphthoquinone 4-sulphonate on solid-phase cartridges. J Chromatogr B Biomed Sci Appl 687(1) 239-246. 

Dihydro-3,4-dioxo-l-naphthlene sulphonic acid sodium salt (l,2-naphthoquinone-4-sulphonic acid sodium salt) [521-24-4] M 260.2. Yellow crystals from aqueous EtOH and dry at 80° in vacuo. Solubility in H2O is 5% Synth Coll Vol III 633 1955 Danielson JBC 101 507 1933 UV Rosenblatt et al. AC 27 1290 7955]. 

HFBA heptafluorobutyric acid EDSA 1,2-ethanedisulphonic acid disodium NQS /J-naphthoquinone-4-sulphonate. 

A similar method was used for the determination of DIHS in kidney and meat from cow and swine. The derivatives were formed using l,2-naphthoquinone-4-sulphonic acid (NQS) in NaOH. The temperature of the derivatization was lower (40°C) in comparison to the method described earlier. Recoveries achieved were 73.2-73.5% for kidney and 80.0-82.9% for muscle (for only two concentration levels), with RSD of 1.5-3.1% and 0.3-1.3%, respectively. After STR was added to the sample, the baseline resolution of the two drugs was not achieved (113). 

Hlabangana, L., Hernandez-Cassou, S. and Saurina, J. (2006) Determination of biogenic amines in wines by ion-pair liquid chromatography and post-column derivatization with l,2-naphthoquinone-4-sulphonate J. Chromatogr. A, 1130, 130-136. 

Enolization of triplet 5,8-dimethyl-1-tetralone by hydrogen transfer effects" ", spin-lattice relaxation of pentacen-6,13-quinone triplets in a benzoic acid host crystal involves proton tunnelling", and photoreduction of benzophenone and thioxanthen-9-one by amines" are other researches of photochemical significance. Interactions of formate ions with triplet states of benzophenone-4-carboxylate and -4-sulphonate, 1,4-naphthoquinone, and anthraquinone-2-sulphonate have been examined systematically by laser flash photolysis". ... 

Smith, J. R. L., Smart, A. U., Hancock, F. E., and Twigg, M. V., High-performance hquid chromatographic determination of low levels of primary and secondary amines in aqueous media via derivatisation with l,2-naphthoquinone-4-sulphonate, J. Chromatogr., 483, 341-348, 1989. 

Interest continues in the photoreactions of quinones, especially anthraquinones, in which substitution occurs in one of the aromatic rings. In the 1,4-naphthoquinone series, irradiation of an aqueous solution of sodium 1,4-naphthoquinone-2-sulphonate gives a mixture of products including the 5-hydroxy-compound the effects of pH, irradiation wavelength, solvents, and radical scavengers are described. Replacement of halogen by butylamino in anthraquinone (103) is... 

Irradiation of sodium anthraquinone sulphonates in micelles leads to photoreduction to the corresponding radical anions, whose lifetimes are much lengthened compared with those obtained in the absence of surfactants.31 It is reported that photoreduction of anthraquinone sulphonates in basic water-alcohol solutions can lead on to desulphonation of the 9,10-dihydroxyanthracenes which are produced.32 Photoreduction of sodium l,2-naphthoquinone-4-sulphonate in water gives the 1,2-dihydroxy-compound.33 In this reaction,... 

ABSTRACT. The complex formation between cyclodextrins (a-,3-,y-CD s and dimethyl-3-CD) and quinones (three 9,10-anthraquinone sulphonates and two 1,4-naphthoquinones) in the water-ethylene glycol 1 1 mixture solution at 77 K was investigated using the n7T phosphorescence spectra and their excitation spectra and lifetimes of the quinones. It was concluded on the basis of the experimental results that the complexes have various structures according to the CD-quinone combination used. Vitamin K3 was found to form the photodimer very effi-... 

Saifer and Oreskes [62] Rosebebk [67] Na-l,2-naphthoquinone-4-sulphonate Kofranyi [68]... 

In this method primary aliphatic and aromatic amines yield coloured products by nucleophilic displacement of the sulphonic group of l,2-naphthoquinone-4-sulphonic acid (44) (equation 29) . This reaction has also been applied in colourimetric determinations... 

H7NO2 0.5 HjO, 4-Amino-1, 2-naphthoquinone hemihydrate, 35B, 118 0H7NO2, 2-Amino-1, 4-naphthoquinone, 31B, 98 34B, 101 oHgBrN03, 4-Amino-3-bromo-1,2-naphthoquinone monohydrate, 42B, 119 oHgKNOgS, Potassium 1,2-naphthoquinone-1-oxime-7-sulphonate monohydrate, 43B, 190... 

H8N2O2, (1Z,2E)-1,2-Naphthoquinone dioxime (form A), 43B, 193 0H8N2O2, (1Z,2E)-1,2-Naphthoquinone dioxime (form B), 43B, 193 oHgNOgS, 1,2-Naphthoquinone-2-oxime-5-sulphonic acid monohydrate, 43B, 192... 

H10KNO7S, Potassium 1,2-naphthoquinone-2-oxime-8-sulphonate dihydrate, 43B, 191... 

C20H1eKN2NaOi5S2f Potassium sodium bis 1,2-naphthoquinone-2-oxime-5-sulphonate) trihydrate, 43B, 197... 

C2oH32N2Ni02oS2 f HexaaquonickeKlI) bis(1,2-naphthoquinone-2-oxime-4-sulphonate) tetrahydrate, 43B, 198... 

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