Spectrophotometric determination of boron in iron and steel with curcumin after separation by 2-ethyl-1,3-hexanediol-chloroform extraction

Effects of curcumin-/boron-based compound complexation on antioxidant and antiproliferation activity

“…After the addition of BTZ, BTZ/cur showed a distinct absorbance peak at wavelength of 540 nm. This result corresponds with UV absorbance wavelengths of complexes of curcumin and boronic acids such as rosocyanine and rubrocurcumin [20,21]. However, the absorbance peak of curcumin and BTZ complexes decreased fast, probably due to poor stability of the BTZ/cur complexes (data not shown).…”

“…After HPLC analysis, the fraction eluted from the HPLC column was dissolved in DMSO to measure UV-Vis absorption spectra. According to previous studies, curcumin has the tendency to redshift after interaction with boron-based compounds [20,21]. In our previous study, gradual redshift of curcumin was observed with the increasing molar ratio of DPBA [14].…”

Determination of Boron in U3O8by Spectrophotometry

“…?a x 1 as L.mol-1 cm-1 , "which is in good agreement with the reported values (1.4 X 1 as to 2.a X 1 as L.mol-1 cm-1 ). 9 The main contribution of blank value (-a.3) was found to be due to A. R. grade H 2 S0 4 . This could be minimized (-a.2) by using suprapure E-Merck H 2 S0 4 .…”

Curcumin-benzodioxaborole chelates

“…[23][24][25][26][27] They have been used for the colorimetric determination of boron. 28 In the presence of boric and oxalic acids, the neutral chelate rubrocurcumin (8) Scheme 2…”