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extensions of some polynomial inequalities to the polar derivative
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15 صفحه اولDirect, derivative spectrophotometric determination of micro amounts of Vanadium (V) by 5-bromo salicylaldehyde isonicotinoyl hydrazone
A simple and highly selective spectrophotometric method has been developed for the determination of trace amounts of V (V) using newly synthesized reagent 5-bromo salicylaldehyde isonicotinoyl hydrazone (5BrSAINH) in aqueous DMF medium. Vanadium (V) forms a brown colored soluble complex with 5-BrSAINH in the pH range 1.0-5.0. The complex shows maximum absorbance at 400nm in the pH range 4.5-5.5...
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In the last decades, the spread of psychotropic drugs belonging to the phenethylamine family has been continually on the rise [1,2]. These drugs are often synthesized illegally in underground laboratories or marketed via-internet by smart shops and chemicals research suppliers [1,3]. Recently, a phenethylamine-related compound named BromoDragonFly (BDF) has received large popularity among young...
متن کاملSecond derivative spectrophotometric method for simultaneous determination of cobalt, nickel and iron using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol.
A simple, sensitive and rapid derivative spectrophotometric method using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) has been developed for simultaneous determination of Co(II), Ni(II) and Fe(II) which have very similar chemical behavior and appear together in many real samples. The complexes of all these metal ions with 5-Br-PADAP were formed immediately at pH 7.0 ammonium aceta...
متن کامل(E)-3-Bromo-N′-(5-bromo-2-hydroxybenzylidene)benzohydrazide
The title compound, C(14)H(10)Br(2)N(2)O(2), was synthesized by the reaction of 5-bromo-salicylaldehyde with an equimolar quantity of 3-bromo-benzohydrazide in methanol. The dihedral angle between the two benzene rings is 10.5 (4)°. In the crystal structure, mol-ecules are linked through inter-molecular N-H⋯O hydrogen bonds to form chains parallel to the c axis, and an intra-molecular O-H⋯N int...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1961
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.9.476