Quality Control of ABTS DiammoniumOn October 15, 2019 ,《Reactivity of chromophoric dissolved organic matter (CDOM) to sulfate radicals: Reaction kinetics and structural transformation》 was published in Water Research. The article was written by Zhang, Suona; Rouge, Valentin; Gutierrez, Leonardo; Croue, Jean-Philippe. The article contains the following contents:
SO4·- would selectively react with electron rich moieties in DOM, known as chromophoric DOM (CDOM), due to its light absorbing property. In this study, the reactivity and typical structural transformation of CDOM with SO·-4 was investigated. Four well characterized hydrophobic DOM fractions extracted from different surface water sources were selected as model CDOM. SO4·- was produced through the activation of peroxymonosulfate (PMS) by Co(II) ions at pH 8 in borate buffer. The reactivity of CDOM changed with time where fast and slow reacting CDOMs (i.e., CDOMfast and CDOMslow) were clearly distinguished. A second-order rate constant of CDOMfast with SO·-4 was calculated by plotting UVA254 decrease vs. PMS exposure; where a Rct value (i.e., ratio of sulfate radical exposure to PMS exposure) was calculated using pCBA as a probe compound The transformation of CDOM was studied through the anal. of the changes in UVA254, electron donating capacity, fluorescence intensity, and total organic carbon. A transformation pathway leading to a significant carbon removal was proposed. This new knowledge on the kinetics and transformation of CDOM would ultimately assist in the development and operation of SO·-4-based water treatment processes. The results came from multiple reactions, including the reaction of ABTS Diammonium(cas: 30931-67-0Quality Control of ABTS Diammonium)
ABTS Diammonium(cas: 30931-67-0) belongs to anime. Left-handed and right-handed forms (mirror-image configurations, known as optical isomers or enantiomers) are possible when all the substituents on the central nitrogen atom are different (i.e., the nitrogen is chiral). With amines, there is extremely rapid inversion in which the two configurations are interconverted.Quality Control of ABTS Diammonium
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica