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CL System (cl + system)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

Investigation on the interaction between dihydroxybenzene and Fe3+,H2O2,Rh6G system based on enhancing chemiluminescence

LUMINESCENCE: THE JOURNAL OF BIOLOGICAL AND CHEMICAL LUMINESCENCE, Issue 1 2006
Deyong He
Abstract A highly sensitive flow-injection chemiluminescence (FI,CL) method has been developed for the determination of dihydroxybenzene, based on the hydroxyl radical reaction. Hydroxyl radical (·OH) produced by the reaction of Fe3+ and H2O2 oxidize rhodamine 6G to produce weak CL. It was observed that catechol and hydroquinone greatly enhanced the weak CL reaction. However, the proposed CL system is not suitable for determination of resorcinol because the enhancement reaction is very slow. The proposed procedure has a linear range of 0.01,2 mg/L for catechol, with a detection limit of 0.006 mg/L, and 0.008,1 mg/L for hydroquinone, with a detection limit of 0.004 mg/L. The possible mechanism of the CL system is discussed. Copyright © 2005 John Wiley & Sons, Ltd. [source]

Determination of iron in blood serum using ,ow injection with luminol chemiluminescence detection

LUMINESCENCE: THE JOURNAL OF BIOLOGICAL AND CHEMICAL LUMINESCENCE, Issue 6 2004
A. Waseem
Abstract A simple and rapid ,ow injection method is reported for the determination of iron in blood serum after acid digestion with HNO3 and HClO4, based on luminol CL detection in the absence of added oxidant. The detection limit (3 s) was 1.0 nmol/L with a sample throughput of 120/h. The calibration graph was linear over the range 0.001,1.0 µmol/L (r2 = 0.9974), with relative standard deviations (RSD) (n = 4) in the range 3.2,5%. The effect of interfering cations (Ca(II), Mg(II), Cu(II), Cd(II), Pb(II), Mn(II), Zn(II), Ni(II), Co(II) and Fe(III)) and anions (Cl,, SO42,, HCO3,, NO3,, NO2,) were studied using a luminol CL system for Fe(II) determination. The method was applied to normal blood serum and the results (1.32 ± 0.08,1.74 ± 0.05 mg/L) were compared with those from a spectrophotometric reference method (1.34 ± 0.06,1.80 ± 0.10 mg/L), which agree fairly well with the overall reference range in blood. Copyright © 2004 John Wiley & Sons, Ltd. [source]

Investigation of Chemiluminescence with Electrogenerated Reagents and Its Analytical Application

CHINESE JOURNAL OF CHEMISTRY, Issue 11 2003
Zhu-Jup Zhang
Abstract In this paper, studies on chemiluminescence (CL) systems with electrogenerated reagents, including BrO,, CIO,, Br2, [Cu-(HIO6)2]5- , H2O2, Mn3+, Co3+ and Ag2+, are described. The analytical applications of the CL system with electrogenerated reagents are reviewed. [source]