Spectrophotometric studies and applications for the determination of yttrium in pure and in nickel base alloys

Amin, Alaa S.; Mohammed, Talaat Y.; Mousa, A A

doi:10.1016/s1386-1425(03)00040-4

Cited by 27 publications

(10 citation statements)

References 14 publications

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“…5-(2`,4`-dimethylphenylazo)-6-hydroxy pyrimidine-2,4-dione (DMPAHPD) dye has been used for spectrophotometric determination of samarium(III) and others [27][28][29][30][31]. In this paper, the fabrication of an optode for determination of low levels of mercury is described in which the sensing reagent is (DMPAHPD) immobilized on triacetylcellulose membrane.…”

Section: Page 5 Of 55mentioning

confidence: 99%

Application of a triacetylcellulose membrane with immobilizated of 5-(2′,4′-dimethylphenylazo)-6-hydroxypyrimidine-2,4-dione for mercury determination in real samples

Amin

2015

Sensors and Actuators B: Chemical

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Section: Page 5 Of 55mentioning

confidence: 99%

Application of a triacetylcellulose membrane with immobilizated of 5-(2′,4′-dimethylphenylazo)-6-hydroxypyrimidine-2,4-dione for mercury determination in real samples

Amin

2015

Sensors and Actuators B: Chemical

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“…Several derivatives of pyrazole (azo) were the subject of research because of a variety of applications. The applications of the azo dyes include their use in coloring fibers, due to their affinity for wool and silk (Patel & Patel, 2011), photoelectronics (Sekar, 1999), optical storage technology (Wang, Shen, & Xu, 2000), biological reactions (Weglarz-Tomczak & Gorecki, 2012), printing systems (Abe, Mano, Yamaya, & Tomotake, 1999;Dharmalingam, Ramasamy, & Balasuramanian, 2011) as well as in analytical (Abdalla, El-Haty, Adam, & Hassan, 2013;Amin, Mohammed, & Mousa, 2003) and food chemistry (Almeida, Stephani, Dos Santos, & Oliveira, 2009). Beside these many azo compounds have been synthesized with an industrial and medical aim.…”

Section: Introductionmentioning

confidence: 99%

New acid dyes and their metal complexes based on substituted phenols for leather: Synthesis, characterization and optical studies

Hussain¹,

Abass²,

Shabir³

et al. 2017

Journal of Applied Research and Technology

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The present investigation deals with synthesis of new acid dyes from 4-amino-1-(4-sulfophenyl)-3-methyl-5-pyrazolone and phenol derivatives and their metal complexes (Cu (II) and Fe (II)). The phenol derivatives include 4-chlorophenol, 4-nitrophenol, 4-hydroxybenzene sulfonic acid, 2-nitrophenol-4-sulfonic acid, resorcinol and bisphenol A and bisphenol S. The newly synthesized dyes were applied to crust leather to assess their dyeing properties. The fastness properties of unmetallized dyes were less as compared to metal complexes due to the strong interaction of metals with leather protein. The structures of these dyes were also confirmed by UV, FTIR and NMR studies.

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“…5-(2`,4`-dimethylphenylazo)-6-hydroxypyrimidine-2,4-dione (DMPAHPD) dye has been used for spectrophotometric determination of samarium(III) and others. [25][26][27][28][29] The goal of the present work is to develop a …”

Section: Introductionmentioning

confidence: 99%

Utilization of cloud-point extraction for colorimetric determination of trace amounts of thorium(iv) in real samples

2015

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A cloud point extraction process using mixed micelle of the cationic surfactant CTAB and non-ionic surfactant Triton X-100 to extract thorium(IV) from aqueous solutions was investigated. The method is based on the color reaction of thorium with 5-(2`,4`-dimethylphenylazo)-6-hydroxypyrimidine-2,4-dione (DMPAHPD) in the presence of potassium iodide in hexamethylenetetramine buffer media and mixed micelle-mediated extraction of complex. The optimal extraction and reaction conditions (e.g. surfactant concentration, reagent concentration, effect of time) were studied and the analytical characteristics of the method (e.g. limit of detection, linear range, molar absorptivity, Sandell sensitivity, preconcentration, and improvement factors) were obtained. Linearity was obeyed in the range of 0.5-15 ng mL − 1 of thorium(IV) ion and the detection limit of the method is 0.16 ng mL − 1 . The interference effect of some anions and cations was also tested. The proposed method was successfully applied for the preconcentration of trace thorium in natural water samples as well as in plant material and soil samples prior to its determination by inductively coupled plasma atomic emission spectrometry (ICP-AES) with satisfactory results. A Perkin-Elmer Lambda 12 UV/Vis spectrometer was used for recording absorbance spectra with 1.0-mm quartz cell. A Perkin Elmer model 5300 DV; ICP-AES (Waltham, MA, USA) was used for all ICP-AES measurements. An Orion research model 601 A/digital ionalyzer pH meter was used for checking the pH of solutions. A water bath with good temperature control and a centrifuge with 10-mL calibrated centrifuge tubes (Superior, Germany) were used to accelerate the phase separation process. Tabletop Low Speed Large Capacity Centrifuge model L-550 was used Reagents Unless otherwise stated, reagents of analytical purity were used for all experiments and doubly distilled water (DDW) was used throughout. The surfactants, Triton X-100 and cethyltrimethylammonium bromide (CTAB) (obtained from Sigma company) were used without further purification. Stock solution of thorium at a concentration of 0.025 M thorium(IV) solution is prepared by dissolving 3.675 g of thorium nitrate [Th(NO 3 ) 4 .6H 2 O] in distilled water containing a few drops of nitric acid. The solution is made upto 250 mL and standardized gravimetrically by employing the iodide method. 0.1 M. working standard solutions were obtained by appropriate dilution of the stock. 5-(2`,4`-Dimethylphenylazo)-6-hydroxypyrimidine-2,4-dione (DMPAHPD) was prepared using conventional diazotization and coupling methods. 25 A solution of 1.0×10 − 3 M of DMPAHPD was prepared by dissolving appropriate amounts of this reagent in bidistilled water. The solution pH 7.8 ± 0.2 was adjusted with hexamethylenetetramine (HTM)/ hydrochloric acid buffer. N,N-dimethyl formamide (DMF) solvent and potassium iodide salt were purchased from Merck.

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Spectrophotometric studies and applications for the determination of yttrium in pure and in nickel base alloys

Cited by 27 publications

References 14 publications

Application of a triacetylcellulose membrane with immobilizated of 5-(2′,4′-dimethylphenylazo)-6-hydroxypyrimidine-2,4-dione for mercury determination in real samples

Application of a triacetylcellulose membrane with immobilizated of 5-(2′,4′-dimethylphenylazo)-6-hydroxypyrimidine-2,4-dione for mercury determination in real samples

New acid dyes and their metal complexes based on substituted phenols for leather: Synthesis, characterization and optical studies

Utilization of cloud-point extraction for colorimetric determination of trace amounts of thorium(iv) in real samples

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