Polarographic behaviour of metal chelates of o,o'-dihydroxyazo dyes

The voltammetric determination of Mo in seawater after adsorptive accumulation of the Eriochrome Blue Black R complex

“…This dye and related compounds have also been 'NRC No. 27138. recommended for the direct polarographic analysis of metals including Al, Fe, Ga, Mg, V, Zn, and the lanthanides (13).…”

New Cyclic Voltammetry of 3-(4-N-Pyridine-2-yl Benzene Sulfonamide Azo)-1-Nitroso Naphthol and the Use of it for Enhancement of Cobalt Oxide Nano Particles

“…On the other hand, the AFM results of the CoO nano crystals showed that the average diameter as determined by the AFM was 96.54 nm for nano particles before ligands exchange and 89.03 for PBSAN after ligand exchange (Table 5 & 6). 17 The average diameter as determined by the AFM for CoO was 96.54 nm before ligand exchange. Fig.…”

“…The peaks observed were due to the reduction of azo -N == N-center. The reduction mechanism includes the formation of hydrazo derivatives followed by the cleavage of the -N==N-bond and the final formation of amines [17,18], according to the following formulas (Scheme 2).…”

Uso do violeta de alizarina N (AVN) como reagente espectrofotométrico na determinação de alumínio

“…O Azul Negro Pontacromo 9 foi empregado para determinar alumínio em soluções de hemodiálise. A determinação polarográfica do alumínio com o AVN foi bastante estudada [15][16][17][18][19][20][21][22][23][24][25][26][27][28] . Os primeiros a sugerirem esta técnica foram Willard e Dean 16 , onde o complexo AVNAl(III), em pH 4,7, necessitava de 5 horas para se formar em temperatura ambiente.…”