Chromogenic Reaction of 1,1-Dimethylhydrazine with Aryltetrazolium Salts

2018 ◽  
Vol 88 (7) ◽  
pp. 1385-1389
Author(s):  
V. M. Ostrovskaya ◽  
D. O. Shchepilov ◽  
E. A. Kletter
Keyword(s):  
Chromogenic Reaction

Sensitive and Selective Determination of Aminophenol Isomers in Chromogenic Reaction by Carbon Nanotubes

2012 ◽  
Vol 578 ◽  
pp. 113-116 ◽  
Author(s):  
Fei Fei Zhang ◽  
Zong Hua Wang ◽  
Zheng Xiao Liu ◽  
Jian Fei Xia ◽  
Yan Zhi Xia ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Selective Determination ◽  
System A ◽  
Chromogenic Reaction

A novel application of carbon nanotubes (CNTs) in the field of chromogenic reactions for recognizing aminophenol isomers was described. Among the three of aminophenol isomers, only p-aminophenol could form the chromogenic system. Comparative experiments proved that the absorption of the complex increased by 23.9% in the presence of CNTs due to the presence of the intact conjugated system. A selective determination of p-aminophenol was obtained

Specificity of the chromogenic reaction of steroids with sulfuric acid

1971 ◽  
Vol 4 (6) ◽  
pp. 266-266 ◽  
Author(s):  
I. Belič ◽  
H. Sočič
Keyword(s):  
Sulfuric Acid ◽  
Chromogenic Reaction

scholarly journals Synthesis of N-o-Methylphenyl-N′-(sodium p-aminobenzene-sulfonate) thiourea and Its Chromogenic Reaction with Palladium(II)

2006 ◽  
Vol 22 (7) ◽  
pp. 989-992
Author(s):  
Lei ZHANG ◽  
Donglan MA ◽  
Jianping LI ◽  
Yulu WANG
Keyword(s):  
Chromogenic Reaction

scholarly journals Determination of total free amino acids in Sipunculus nudus by UV spectrophotometry

2020 ◽  
Vol 189 ◽  
pp. 02013
Author(s):  
Hongli Ye ◽  
Youqiong Cai ◽  
Longfei Zhang ◽  
Wei Yu ◽  
Yongfu Shi ◽  
...  
Keyword(s):  
Amino Acids ◽  
Free Amino Acids ◽  
Free Amino ◽  
Limit Of Detection ◽  
Uv Spectrophotometry ◽  
Aquatic Products ◽  
Chromogenic Reaction ◽  
Sipunculus Nudus ◽  
Relative Standard ◽  
Pretreatment Conditions

Here we developed a new, facile method to detect free amino acids (TFAA) in Sipunculus nudus by UV spectrophotometry. The pretreatment conditions of the approach were optimized, such as chromogenic reaction temperature and time, the measurement time after chromogenic reaction, the extraction agent and its concentration, the extraction time. The established method showed a good linearity in the TFAA range 0.0 ~ 40.0 cg/mL (R2= 0.9958) with the limit of detection (LOD) 1.96 g /mL and the precision of 6.14 % (relative standard deviation, RSD). The addition standard recoveries were 95.1 % ~108.6 %. Finally, the method was successfully applied in detection of TFAA in Sipunculus nudus and other aquatic products. The results showed that the content of TFAA in Sipunculus nudus was higher than that in the other aquatic products collected in our paper, and as high as 138.14 g/kg.

Smartphone-integrated urinary CTX-II immunosensor based on wavelength filtering from chromogenic reaction

2020 ◽  
Vol 150 ◽  
pp. 111932
Author(s):  
Saemi Kim ◽  
Hyeong Jin Chun ◽  
Kyung Won Lee ◽  
Hyun C. Yoon
Keyword(s):  
Chromogenic Reaction ◽  
Wavelength Filtering

Optical method for detecting oxygen via the chromogenic reaction catalyzed by polyphenol oxidase

2018 ◽  
Vol 114 ◽  
pp. 1-6 ◽  
Author(s):  
Abdelaziz Bouchaib ◽  
Abdellatif Ben abdellah ◽  
Mohamed Bakkali ◽  
Amine Laglaoui ◽  
Abdelhay Arakrak ◽  
...  
Keyword(s):  
Polyphenol Oxidase ◽  
Optical Method ◽  
Chromogenic Reaction
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