Spectrophotometric and complexometric methods for the determination of thorium and fluoride using bromocresol orange reagent

ME Khalifa, MAH Hafez - Talanta, 1998 - Elsevier
The ternary purple coloured complex formed between Th4+, bromocresol orange (BCO) and
cetylpyridinium bromide (CPB) in acidic medium was investigated spectrophotometrically …

Synthesis, structural and catalytic activity of binaphthyl macrocyclic complexes

AI Hanafy, ABKT Maki, MM Mostafa - Transition Metal Chemistry, 2007 - Springer
The binaphthyl macrocyclic ligand, N, N′-diethyl-[3, 3′-(2, 2′-dihydroxy-1, 1′-
binaphthyl) carboxamide]-2, 2′-dihydroxy-1, 1′-binaphthyl-3, 3′-dicarboxylic acid …

[HTML][HTML] Determination of Hafnium in Zirconium by Spectrophotometry

X Jiao, X Lv, S Li, Z Lv, J Song - Processes, 2024 - mdpi.com
Zirconium and hafnium have opposite nuclear properties and are used very differently in the
nuclear industry. However, hafnium is a common metal impurity in zirconium, and the …

N-2-[4, 6-DIMETHYLPYRIDYL]-N′-PHENYLTHIOUREA (HDMPyPt) TRANSITION METAL COMPLEXES

HA Bayoumi, EM Shoukry… - Synthesis and Reactivity in …, 2001 - Taylor & Francis
Several types of new metal complexes of N-2-[4, 6-dimethylpyridyl]-N′-phenylthiourea
(HDMPyPT) have been prepared from M (OAc) 2 [M= Cu (II), Zn (II), Ni (II), Co (II), UO2 (VI)] …

Determination of thorium using phenylfluorone and quercetin in the presence of surfactants and protective colloids

MTM Zaki, AY El-Sayed - Analytical letters, 1995 - Taylor & Francis
Two sensitive spectrophotometric methods have been proposed for the determination of
thorium with phenylfluorone (PF) and quercetin (Quer) in the presence of cetylpyridinium …

Spectrophotometric determination of thorium in food using 2-(2, 5-disulfonic-4-methoxyphenylazo)-7-(2-hydroxyl-5-carboxylphenylazo)-1, 8-dihydroxynaphthalene-3 …

S Meng, M Tian, Y Liu, Y Guo, Y Fan - Journal of Analytical Chemistry, 2007 - Springer
A new highly sensitive and selective chromogenic reagent, 2-(2, 5-disulfonic-4-
methoxyphenylazo)-7-(2-hydroxyl-5-carboxylphenylazo)-1, 8-dihydroxynaphthalene-3, 6 …

Spectroscopic studies of some novel CuI and CuII complexes derived from the tribochemistry reactions of KBr, KI and CaI2 with CuII–Girard's T complex [Cu (GT) Cl2 …

MM Mostafa, MH Abdel-Rhman - … Acta Part A: Molecular and Biomolecular …, 2000 - Elsevier
Novel CuI and CuII complexes derived from the tribochemistry reactions of [Cu (GT) Cl2
(H2O) 2 (EtOH)] Cl· H2O with KBr, KI and CaI2 have been isolated and characterized. The …

[HTML][HTML] Novel mono-and binuclear complexes derived from N-benzoyl-N-glycylthiourea (BGH) with some transition metal ions

N Nawar, II El-Swwah, NM Hosny… - Arabian Journal of …, 2015 - Elsevier
New metal complexes derived from the reaction of N-benzoyl-N-glycylthiourea (BGH) with
Cu (II), Co (II), Ni (II), Zn (II) and Fe (III) chloride and/or acetate salts have been synthesized …

Titration of thorium and rare earths with ethylenediaminetetraacetic acid using Semimethylthymol Blue by visual end-point indication

MAH Hafez, IMM Kenawy, MAM Ramadan - Analyst, 1994 - pubs.rsc.org
The precision and accuracy attainable in direct complexometric titrations of Th4+
consecutively with either lighter (La3+, Nd3+, Sm3+, Eu3+ or Gd3+) or heavier lanthanides …

Comparative analytical determination of thorium in medium and low-grade minerals and ores using semimethylthymol blue

MAH Hafez, IMM Kenawy, MAM Ramadan - Analytical letters, 1994 - Taylor & Francis
The composition, stability constants and molar absorption coefficient of the chelate of
thorium ion with Semimethylthymol Blue, SMTB is determined spectrophotometrically in a …