Enhancing and inhibiting effects of aromatic compounds on luminol–dimethylsulfoxide–OH− chemiluminescence and determination of intermediates in oxidative hair dyes by HPLC with chemiluminescence detection☆

Enhancement of chemiluminescence of the KIO4–luminol system by gallic acid, acetaldehyde and Mn2+: application for the determination of catecholamines

“…• OH, [24,25] and singlet oxygen 1 O 2 , [26,27] generated from the oxidation of appropriate reducing agents. By a similar strategy but using two reducing agents, we found a tremendous enhancement in CL emission from the oxidation of luminol with KIO 4 in a strong alkaline medium by the combined effect of gallic acid and acetaldehyde.…”

Post-column detection of benzenediols and 1,2,4-benzenetriol based on acidic potassium permanganate chemiluminescence

“…For the HPLC-CL methods, our method covered a wider linear range (two orders of magnitude) than all others and the detection limits were superior to the work of Cui et al [22] and Zhou et al [24] with respect to resorcinol, who had employed luminol-potassium-hexacyanoferrate(III) and Ce +4 -Tween 20 systems, respectively, and similar to Cui et al's another work [23] in which luminol-dimethylsulfoxide-OH − reaction was used or Zhou et al's work [24] concerning hydroquinone. Moreover, their detection samples were mainly biological [22], pharmaceutical [23], cosmetic [24] or even without at all [21]. In addition, we used an isocratic elution program for the separation purpose that overcame baseline drift which occurred in other HPLC-CL detections [22].…”

“…It can be expected that the technique of combination of CL detection with high-performance liquid chromatography (HPLC) separation will provide both good sensitivity and selectivity. However, practical application of the HPLC-CL technique for the determination of phenolic compounds is still uncommon [19][20][21], only few investigations concerning it have been reported [21][22][23][24]. Moreover, the varieties of sample detected were limited and some of them even detected no real sample at all [21].…”

A stopped‐flow study of the dual chemiluminescence for the luminol–KIO4–Mn2+ system in strong alkaline solutions

“…Uric acid and methanol significantly enhanced the CL emission by 27% each, while DMSO strongly inhibited it by 90%. It has been reported that, when reacting with dissolved oxygen in strong alkaline solution, uric acid could produce O 2 − and 1 O 2 (23), while DMSO produced O 2 − (14). The generated ROS could either induce additional emission for CL enhancement, as in the case of uric acid or destroy the existing CL‐inducing ROS for inhibition of CL emission, as observed for DMSO.…”