A contribution to the determination of some anions via titration with a lead(II) nitrate solution using heterocyclic azo dyes as indicators

1974 ◽  
Vol 39 (1) ◽  
pp. 101-109 ◽  
Author(s):  
L. Sommer ◽  
L. Janošcová
Keyword(s):  
Azo Dyes ◽  
Nitrate Solution

scholarly journals 1,3,4-Thiadiazole-Containing Azo Dyes: Synthesis, Spectroscopic Properties and Molecular Structure

Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2822
Author(s):  
Agnieszka Kudelko ◽  
Monika Olesiejuk ◽  
Marcin Luczynski ◽  
Marcin Swiatkowski ◽  
Tomasz Sieranski ◽  
...  
Keyword(s):  
Azo Dyes ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Spectroscopic Properties ◽  
Radiation Absorption ◽  
Functional Theory ◽  
Chemical Structures ◽  
Vis Spectroscopy ◽  
High Yields

Three series of azo dyes derived from 2-amino-5-aryl-1,3,4-thiadiazoles and aniline, N,N-dimethylaniline and phenol were synthesized in high yields by a conventional diazotization-coupling sequence. The chemical structures of the prepared compounds were confirmed by 1H-NMR, 13C-NMR, IR, UV-Vis spectroscopy, mass spectrometry and elemental analysis. In addition, the X-ray single crystal structure of a representative azo dye was presented. For explicit determination of the influence of a substituent on radiation absorption in UV-Vis range, time-dependent density functional theory calculations were performed.

Simultaneous Determination of Harmful Aromatic Amine Products of Azo Dyes by Gas Chromatography–Mass Spectrometry

2020 ◽  
Vol 75 (10) ◽  
pp. 1330-1334
Author(s):  
Dotse Selali Chormey ◽  
Buse Tuğba Zaman ◽  
Esra Maltepe ◽  
Çağdaş Büyükpınar ◽  
Ayşe Evrim Bulgurcuoğlu ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Simultaneous Determination ◽  
Aromatic Amine ◽  
Azo Dyes ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry

Polarographic and voltammetric determination of selected triazine-based azo dyes with different reactive groups

1996 ◽  
Vol 320 (1) ◽  
pp. 31-42 ◽  
Author(s):  
Jir̆í Barek ◽  
Arnold G. Fogg ◽  
Josino C. Moreira ◽  
M.Valnice B. Zanoni ◽  
Jir̆í Zima
Keyword(s):  
Azo Dyes ◽  
Voltammetric Determination ◽  
Reactive Groups

Determination of sulfonated azo dyes in chili powders by MALDI-TOF MS

2019 ◽  
Vol 411 (22) ◽  
pp. 5833-5843 ◽  
Author(s):  
Missael Antonio Arroyo Negrete ◽  
Kazimierz Wrobel ◽  
Eunice Yanez Barrientos ◽  
Alma Rosa Corrales Escobosa ◽  
Francisco Javier Acevedo Aguilar ◽  
...  
Keyword(s):  
Azo Dyes ◽  
Maldi Tof Ms ◽  
Maldi Tof ◽  
Tof Ms ◽  
Sulfonated Azo Dyes

Modified Method for the Determination of Mycotoxins in Cocoa Beans

1973 ◽  
Vol 56 (4) ◽  
pp. 1028-1030 ◽  
Author(s):  
Peter M Scott
Keyword(s):  
Silver Nitrate ◽  
Ochratoxin A ◽  
Nitrate Solution ◽  
Silver Nitrate Solution ◽  
Solvent Mixture ◽  
Cocoa Beans ◽  
Extraction Solvent ◽  
Modified Method

Abstract Method 26.026–26.030 was modified for the analysis of cocoa beans for aflatoxins by inclusion of 3% silver nitrate solution in the extraction solvent mixture. Recoveries of aflatoxins and ochratoxin A added at levels of 5–45 and 20–300 μg/kg, respectively, were satisfactory.

The effect of perspiration on photo-induced chemical reaction of azo dyes and the determination of aromatic amine products

2012 ◽  
Vol 94 (1) ◽  
pp. 55-59 ◽  
Author(s):  
Haiyan Li ◽  
Zhongduo Xiong ◽  
Xibin Dai ◽  
Qinqfu Zeng
Keyword(s):  
Aromatic Amine ◽  
Chemical Reaction ◽  
Azo Dyes
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