Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Hassan Sedaira"'
Publikováno v:
Egyptian Sugar Journal. 17:1-22
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3befbdfbecb4a163aeab1d7fb1effd0
https://doi.org/10.21608/esugj.2022.219137
https://doi.org/10.21608/esugj.2022.219137
Publikováno v:
Talanta. 78:81-87
A derivative spectrophotometric method has been developed for the determination of strontium in Portland cement. The method is applied successfully for the simultaneous determination of SrO, MgO and CaO. It is based on the use of Alizarin Complexone
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06cb3d5516d9a612bd3c91cf6ca9342f
https://doi.org/10.1016/j.talanta.2008.10.044
https://doi.org/10.1016/j.talanta.2008.10.044
Autor:
Hassan Sedaira
Publikováno v:
Talanta. 51:39-48
A new direct spectrophotometric determination of manganese with 5,8-dihydroxy-1,4-naphthoquinone (naphthazarin,NAZA) is reported. Absorption maximum, molar absorptivity and Sandell's sensitivity of 1:2 (M:L) complex are 695 nm, 1.88x10(4) l mol(-1) c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e705bd701f3fdfa5a1cf08b2c3cf057
https://doi.org/10.1016/s0039-9140(99)00244-1
https://doi.org/10.1016/s0039-9140(99)00244-1
Publikováno v:
Talanta. 50:913-919
A rapid, sensitive and highly selective spectrophotometric method for the determination of manganese oxide content of Portland cement and cement raw meal is developed. The method is based on the reaction of manganese(II) with 1,2,4 trihydroxyanthraqu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a686df02f0eacec660f9fa4cca1cb4d
https://doi.org/10.1016/s0039-9140(99)00175-7
https://doi.org/10.1016/s0039-9140(99)00175-7
Publikováno v:
Monatshefte für Chemie / Chemical Monthly. 129:49-58
A new direct spectrophotometric method for the determination of magnesium oxide in Portland cement and cement clinker is proposed. The method is based on a reaction with quinizarin (QUIN, 1,4-dihydroxyanthraquinone) in ethanol-water (50% v/v) solutio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77f1b4cca1340c7f49da23eb0a8f58b7
https://doi.org/10.1007/pl00010104
https://doi.org/10.1007/pl00010104
Autor:
Hassan Sedaira
Publikováno v:
Monatshefte f�r Chemie Chemical Monthly. 128:147-156
The complexation equilibria of zirconium(IV) withlawsone (2-hydroxy-1,4-naphthoquinone) have been studied spectrophotometrically in 40% (v/v) ethanol at 20°C and at an ionic strength of 0.1M (NaClO4). A complete picture of the solution equilibria in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1980405186ef1fa19c76948be7bf30e3
https://doi.org/10.1007/bf00807303
https://doi.org/10.1007/bf00807303
Publikováno v:
Journal of Solution Chemistry. 25:95-103
The solvation number and hydration constant of Th4+ in ethanol-water medium were determined at 25°C using UV-spectral and electrochemical measurements. A solvate formation equilibrium is demonstrated and characterized. Three molecules of ethanol (S)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db81c5425c1d1510a1e1334771b8c5db
https://doi.org/10.1007/bf00972762
https://doi.org/10.1007/bf00972762
Publikováno v:
Monatshefte f�r Chemie Chemical Monthly. 127:29-42
The electronic absorption spectra of 2-hydroxy-1,4-naphthoquinone (HNQ) in one- and two-component solvents are discussed. The visible absorption of this reagent has been shown to arise from a charge-transfer transition of the zwitterionic tautomer st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be21192b0c873225b006466a38d40026
https://doi.org/10.1007/bf00807406
https://doi.org/10.1007/bf00807406
Publikováno v:
Monatshefte f�r Chemie Chemical Monthly. 122:507-520
The solution equilibria of 2-hydroxynicotinic acid (hyna) complexes with mercury(II) have been studied spectrophotometrically in 50% (v/v) ethanol at 20°C and an ionic strength of 0.1mol dm−3 (NaClO4). Three mercuric complexes are formed in soluti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74befa43414acc535d6c7fa9ac309da8
https://doi.org/10.1007/bf00809803
https://doi.org/10.1007/bf00809803
Publikováno v:
Monatshefte f�r Chemie Chemical Monthly. 121:481-492
The complex equilibria of mercury(II) with Lawsone [2-hydroxy-1,4-naphthoquinone,LAS] were studied spectrophotometrically in 40% (ν/ν) ethanol water at 20°C and an ionic strength of 0.1M (NaClO4). A complete picture of the solution equilibria in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19531c83ea12d147eb16b8d4f1b062ef
https://doi.org/10.1007/bf00810855
https://doi.org/10.1007/bf00810855