101036

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Enrichment/separation of cadmium(II) and lead(II) in environmental samples by solid phase extraction.

Mustafa Tuzen et al.

Journal of hazardous materials, 121(1-3), 79-87 (2005-05-12)

A preconcentration/separation procedure is presented for the solid phase extraction of trace cadmium and lead ions as their 1-(2-pyridylazo) 2-naphthol (PAN) chelates in environmental samples on Chromosorb-106 resin, prior to cadmium and lead determinations by atomic absorption spectrometry. The preconcentration

[Ion floatation-spectrophotometric determination of palladium(II) content in acetaldehyde catalyst].

Hui-ru Dong et al.

Guang pu xue yu guang pu fen xi = Guang pu, 24(3), 345-347 (2005-03-12)

The nature of palladium (I) and copper (II) is very similar, so it is very difficult to determine trace palladium (II) in the coexistence of a great quantity of copper (II). This paper applied ion floatation-spectrophotometric principle, using 1-(2-pyridylazo)-2-naphthol (PAN)

Analytical Sciences, 5, 601-601 (1989)

H-point standard addition method for simultaneous spectrophotometric determination of Co(II) and Ni(II) by 1-(2-pyridylazo)2-naphthol in micellar media.

Abbas Afkhami et al.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 60(1-2), 181-186 (2003-12-13)

A very simple and selective spectrophotometric method for simultaneous determination of Co(II) and Ni(II) by 1-(2-pyridylazo) 2-naphthol (PAN), in micellar media, using H-point standard addition method (HPSAM) is described. The ligand and its metal complexes (Co(II)-PAN and Ni(II)-PAN) were made

Hemolytic activity and solubilizing capacity of raffinose and melezitose fatty acid monoesters prepared by enzymatic synthesis.

Luis Carvalho et al.

European journal of pharmaceutics and biopharmaceutics : official journal of Arbeitsgemeinschaft fur Pharmazeutische Verfahrenstechnik e.V, 92, 139-145 (2015-03-11)

The hemolytic activity and solubilizing capacity of two families of non-reducing trisaccharide fatty acid monoesters have been studied to assess their usefulness as surfactants for pharmaceutical applications. The carbohydrate-based surfactants investigated included homologous series of raffinose and melezitose monoesters bearing

Zero-crossing second derivative spectrophotometry for simultaneous determination of palladium and nickel using 1-(2-pyridylazo)-2-naphthol in mixed micellar solutions.

Habibollah Eskandari

Annali di chimica, 94(7-8), 591-599 (2004-09-07)

1-(2-Pyridylazo)-2-naphthol (PAN) has been used for the simultaneous determination of nickel and palladium at trace levels. PAN complexes of nickel and palladium in the pH 1.98 form red and green colored complexes, respectively, which are soluble in aqueous 4:1 Triton

Solid-phase extraction of antimony using chemically modified SiO2-PAN nanoparticles.

Anupreet Kaur et al.

Journal of AOAC International, 93(4), 1302-1307 (2010-10-07)

A new analytical method using 1-(2-pyridylazo)-2-naphthol (PAN)-modified SiO2 nanoparticles as solid-phase extractant has been developed for the preconcentration of trace amounts of Sb(III) in different water samples. Conditions of the analysis such as preconcentration factor, effect of pH, sample volume

Microchemical Journal, Devoted to the Application of Microtechniques in All Branches of Science, 40, 94-94 (1989)

Copper recovery from ore by liquid-liquid extraction using aqueous two-phase system.

Leandro Rodrigues de Lemos et al.

Journal of hazardous materials, 237-238, 209-214 (2012-09-11)

We investigated the extraction behavior of Cu(II) in the aqueous two-phase system (ATPS) formed by (L35+MgSO(4)+H(2)O) or (L35+(NH(4))(2)SO(4)+H(2)O) in the presence of the extracting agent 1-(2-pyridylazo)-2-naphthol (PAN). At pH=3 and a PAN concentration of 0.285 mmol kg(-1), both ATPS lead

Determination of trace amounts of Cu2+, Ni2+, and Mn2 ions after preconcentration onto PAN-immobilized organo nanoclay as a new sorbent.

Daryoush Afzali et al.

Journal of AOAC International, 91(6), 1430-1434 (2009-02-11)

The application of organo nanoclay 1-(2-pyridylazo)-2-naphthol (PAN)-immobilized as a new, easily prepared, and stable solid sorbent for preconcentration of trace amounts of Cu2+, Ni2+, and Mn2+ ions in aqueous solution is presented. The organo nanoclay was prepared by adding tetradecyldimethylbenzylammonium

Formulation and preclinical studies with a trivalent rotavirus P2-VP8 subunit vaccine.

Kyle Lakatos et al.

Human vaccines & immunotherapeutics, 16(8), 1957-1968 (2020-01-30)

More effective rotavirus vaccines are essential for preventing extensive diarrheal morbidity and mortality in children under five years of age in low-resource regions. Nonreplicating rotavirus vaccines (NRRV) administered parenterally provide an alternate vaccination method to the current licensed oral vaccine.

ESI-MS quantitation of iron as its 4-(2-pyridylazo)resorcinol (PAR) complex: application to pharmaceutical tablets containing iron oxide pigment.

Dendi Susanto et al.

Journal of mass spectrometry : JMS, 46(5), 508-516 (2011-04-27)

Quantitation of iron oxide (Fe(2)O(3)) in pharmaceutical formulations using electrospray ionization mass spectrometry (ESI-MS) following iron complexation with 4-(2-pyridylazo)resorcinol (PAR) was evaluated. Complexation of Fe(III) with PAR was found to produce an intense mass spectral signal at low pH compared

Planar triazinium cations from vanadyl-mediated ring cyclizations: the thiazole species for efficient nuclear staining and photocytotoxicity.

Puja Prasad et al.

Dalton transactions (Cambridge, England : 2003), 42(13), 4436-4449 (2013-01-31)

Planar triazinium cationic species from vanadyl-assisted cyclization of 1-(2-thiazolylazo)-2-naphthol (H-TAN, 1), 1-(2-pyridylazo)-2-naphthol (H-PAN, 2), 2-(2'-thiazolylazo)-p-cresol (H-TAC, 3) and 6-(2'-thiazolylazo)-resorcinol (H-TAR, 5) were prepared and characterized. A dioxovanadium(V) species [VO(2)(TAR)] (4) was also isolated. Compounds 1, 2 and 4 were structurally

Solid-phase extraction of iridium from soil and water samples by using activated carbon cloth prior to its spectrophotometric determination.

Nebiye Ozkantar et al.

Environmental monitoring and assessment, 187(8), 501-501 (2015-07-15)

A solid-phase extraction method for separation and preconcentration of Ir(IV) ion by using activated carbon cloth (ACC) has been presented. Ir(IV) as their 1-(2-pyridylazo) 2-naphtol (PAN) chelate was adsorbed on ACC at pH 2.0 and was eluted from ACC with acidic

[Determination of trace cobalt in water samples by graphite furnace atomic absorption spectrometry after cloud point].

Yuan Zhang et al.

Guang pu xue yu guang pu fen xi = Guang pu, 25(4), 576-578 (2005-08-16)

In buffer solution of citric acid monohydrate-disodium hydrogen phosphate at pH 5-7.5, cobalt water samples were chelated by 1-(2-pyridylazo)-2-naphthol (PAN) to form Co-PAN. After water-bath at 66 degrees C for two hours, Co-PAN is extracted into Triton X-100 nonionic surfactant

A novel ionic liquid/micro-volume back extraction procedure combined with flame atomic absorption spectrometry for determination of trace nickel in samples of nutritional interest.

Shayesteh Dadfarnia et al.

Journal of hazardous materials, 173(1-3), 534-538 (2009-09-12)

A simple, highly sensitive and environment-friendly method for the determination of trace amount of nickel ion in different matrices is proposed. In the preconcentration step, the nickel from 10 mL of an aqueous solution was extracted into 500 microL of

Characterization of disposable optical sensors for heavy metal determination.

Jadranka Vuković et al.

Talanta, 94, 123-132 (2012-05-23)

This paper presents the development, characterization and quality control of analytical methods based on the use of disposable optical sensors for determination of heavy metals. Chromogenic reagents such as 1-(2-pyridylazo)-2-naphthol, (2-pyridylazo)resorcinol, Zincon, Ferrozine, and Chromazurol S were used to develop

H-point standard addition method for the selective simultaneous determination of nickel and copper using 1-(2-pyridylazo)-2-naphthol in Tween 80 micellar media.

Habibollah Eskandari et al.

Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 20(7), 1095-1098 (2004-08-06)

The H-point standard addition method (HPSAM) has been applied for the simultaneous determination of nickel and copper in trace levels, using 1-(2-pyridylazo)-2-naphthol (PAN) as a chromogenic reagent in aqueous Tween 80 micellar media. Under the optimum condition, the simultaneous determinations

Sensor technologies based on a cellulose supported platform.

Jane Holly Poplin et al.

Chemical communications (Cambridge, England), (20)(20), 2025-2027 (2007-08-24)

A simple approach to sensor development based on encapsulating a probe molecule in a cellulose support followed by regeneration from an ionic liquid solution is demonstrated here by the codissolution of cellulose and 1-(2-pyridylazo)-2-naphthol in 1-butyl-3-methylimidazolium chloride followed by regeneration

Automatic on-line pre-concentration system using a knotted reactor for the FAAS determination of lead in drinking water.

Anderson S Souza et al.

Journal of hazardous materials, 141(3), 540-545 (2006-09-08)

An automatic on-line pre-concentration system is proposed for lead determination in drinking water using flame atomic absorption spectrometry (FAAS). Lead(II) ions are retained as the 1-(2-pyridylazo)-2-naphthol (PAN) complex in the walls of a knotted reactor, followed by an elution step

Spectrophotometric study of complex formations between 1-(2-pyridylazo)-2-naphthol (PAN) and some metal ions in organic solvents and the determination of thermodynamic parameters.

Z Safari et al.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 78(5), 1606-1610 (2011-03-09)

The complexation reactions between Ni(2+), Co(2+) and Zn(2+) metal ions with PAN in methanol (MeOH), acetonitrile (AN) and dimethyl sulfoxide (DMSO) were studied using a spectrophotometric method. The stability constants of the resulting complexes were determined from computer fitting absorbance

Solidified floating organic drop microextraction (SFODME) for simultaneous separation/preconcentration and determination of cobalt and nickel by graphite furnace atomic absorption spectrometry (GFAAS).

Mahboubeh Shirani Bidabadi et al.

Journal of hazardous materials, 166(1), 291-296 (2009-01-02)

Solidified floating organic drop microextraction (SFODME), combined with graphite furnace atomic absorption spectrometry (GFAAS) was proposed for simultaneous separation/enrichment and determination of trace amounts of nickel and cobalt in surface waters and sea water. 1-(2-Pyridylazo)-2-naphthol (PAN) was used as chelating

SERS and DFT investigation of 1-(2-pyridylazo)-2-naphthol and its metal complexes with Al(III), Mn(II), Fe(III), Cu(II), Zn(II) and Pb(II).

László Szabó et al.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 93, 266-273 (2012-04-10)

The development of surface-enhanced Raman scattering (SERS) as a prospective analytical methodology for detection of metal ions was shown in recent years by several studies on metal complexes. In this work, 1-(2-pyridylazo)-2-naphthol (PAN) and its Al(III), Mn(II), Fe(III), Cu(II), Zn(II)

Highly selective and sensitive colorimetric probe for hydrogen sulfide by a copper (II) complex of azo-dye based on chemosensing ensemble approach.

Dengqing Zhang et al.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 90, 35-39 (2012-02-07)

A copper (II) complex of azo-dye (Cu-1) has been synthesized by the reaction of 1-(2-pyridylazo)-2-naphthol (1) with copper (II) chloride. The complex Cu-1 is able to selectively sense hydrogen sulfide over other anions followed by the release of compound 1

The efficiency of Amberlite XAD-4 resin loaded with 1-(2-pyridylazo)-2-naphthol in preconcentration and separation of some toxic metal ions by flame atomic absorption spectrometry.

Aminul Islam et al.

Environmental monitoring and assessment, 175(1-4), 201-212 (2010-05-29)

A selective method has been developed for the determination of trace amount of metal ions after preconcentration on 1-(2-pyridylazo)-2-naphthol loaded Amberlite XAD-4 resin. The chelating resin was characterized on the basis of infra red spectra, thermal and chemical stability, and

[Simultaneous analysis of trace Cu2+, Ca2+ and Zn2+ in surface water from Yangtze and Jialing River with Kalman filter-spectrophotometry].

Xin-an Liu et al.

Guang pu xue yu guang pu fen xi = Guang pu, 28(6), 1383-1386 (2008-09-20)

1-(2-pyridine azo)-2-naphthol(PAN) is one of color reagent to determine the concentration of many trace metal ions. The analyzing conditions of PAN chelating reaction with three metal ions such as Cu2+, Cd2+ and Zn2+, the spectral properties at maximum absorption wavelength

Application of 1-(2-pyridylazo)-2-naphthol-modified nanoporous silica as a technique in simultaneous trace monitoring and removal of toxic heavy metals in food and water samples.

Jafar Abolhasani et al.

Environmental monitoring and assessment, 187(1), 4176-4176 (2014-12-17)

Solid-phase extraction is one the most useful and efficient techniques for sample preparation, purification, cleanup, preconcentration, and determination of heavy metals at trace levels. In this paper, functionalized MCM-48 nanoporous silica with 1-(2-pyridylazo)-2-naphthol was applied for trace determination of copper

1-(2-Pyridylazo)-2-naphthol as possible analytical reagent.

Cheng KL and Bray RH.

Analytical Chemistry, 27(5), 782-785 (1955)

Differential pulse polarographic determination of lead in standard alloys and biological samples after separation and preconcentration with PAN.

Mohammad Ali Taher

Annali di chimica, 94(5-6), 437-446 (2004-07-29)

A highly selective, sensitive, rapid and economical differential pulse polarographic method has been developed for the determination of trace amount of lead in various samples after adsorption of its 1-(2-pyridylazo)-2-naphthol (PAN) on naphthalene in the pH range of 8.4 -

Use of nanoporous Cu(II) ion imprinted polymer as a new sorbent for preconcentration of Cu(II) in water, biological, and agricultural samples and its determination by electrothermal atomic absorption spectrometry.

Hamid Fazelirad et al.

Journal of AOAC International, 97(4), 1159-1166 (2014-08-26)

A new and selective Cu(ll) ion imprinted polymer was prepared by formation of 1-(2-pyridylazo)-2-naphthol complex for selective extraction and preconcentration of Cu ions. Polymerization was performed with ethylene glycol dimethacrylate as a crosslinking monomer and methacrylic acid as a functional

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