Colorimetric determination of molybdenum with 5,7-dibromo-8-hydroxyquinoline

1968 ◽  
Vol 46 (8) ◽  
pp. 1379-1382 ◽  
Author(s):  
I. I. M. Elbeih ◽  
M. A. Abou-Elnaga
Keyword(s):  
Nitric Acid ◽  
Paper Chromatography ◽  
Solvent Mixture ◽  
New Method ◽  
Colorimetric Determination

A new method for the colorimetric determination of molybdenum(VI) uses 5,7-dibromo-8-hydroxyquinoline as coloring reagent. Molybdenum(VI) is separated from other elements by paper chromatography using a butanol – nitric acid – acetylacetone solvent mixture.

A dynamic gas extraction-assisted paper-based method for colorimetric determination of bromides

2020 ◽  
Vol 12 (4) ◽  
pp. 587-594 ◽  
Author(s):  
Marina O. Gorbunova ◽  
Maria S. Garshina ◽  
Margarita S. Kulyaginova ◽  
Vladimir V. Apyari ◽  
Aleksei A. Furletov ◽  
...  
Keyword(s):  
Natural Waters ◽  
New Method ◽  
Colorimetric Determination ◽  
Gas Extraction ◽  
Selective Determination

A new method for selective determination of bromides in natural waters, foodstuffs and pharmaceuticals has been developed.

Colorimetric Determination of Nitrates and Nitric Acid Esters

1949 ◽  
Vol 21 (11) ◽  
pp. 1385-1389 ◽  
Author(s):  
A. C. Holler ◽  
R. V. Huch
Keyword(s):  
Nitric Acid ◽  
Colorimetric Determination ◽  
Acid Esters

A novel bromelain-MnO2 biosensor for colorimetric determination of dopamine

2021 ◽  
Vol 45 (1) ◽  
pp. 92-97
Author(s):  
Shimeng Liu ◽  
Xiayu Zhou ◽  
Changyin Lv ◽  
Ran Liu ◽  
Shiya Li ◽  
...  
Keyword(s):  
Oxidase Activity ◽  
New Method ◽  
Colorimetric Determination ◽  
Colorimetric Sensing

We report a method for determining dopamine in serum via colorimetric sensing. This new method adopts bromelain-templated MnO2 nanosheets that possess high oxidase activity. 3,3′,5,5′-Tetramethylbenzidine (TMB) can be directly oxidized by bromelain-MnO2 nanosheets to oxTMB products.

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