Luminescence properties of metal(II)-diethyldithiocarbamate chelate complex particles and its analytical application.
In a suitable pH buffer solutions, sodium diethyldithiocarbamate (DDTC) reacts with some divalence metal ions M(II) to form (M-DDTC)( n ) chelate complex nanoparticles, which exhibit different luminescence properties. There is a strongest luminescence peak at 470 nm for the Co(II)-DDTC system, three peaks at 330, 470, and 630 nm for the Cu(II)-DDTC system, three peaks at 420, 470, and 630 nm for the Cd(II)-DDTC system, four peaks at 350, 400, 435, and 470 nm for the Ni(II)-DDTC system, two peaks at 408 and 470 nm for the Pb(II)-DDTC system, two peaks at 415 and 470 nm for the Fe(II)-DDTC system. The different luminescence properties of (M-DDTC)( n ) chelate complex nanoparticles was explained. Under the optimal conditions, the luminescence intensity of (Co-DDTC)( n ) chelate complex nanoparticles at 470 nm (F (470 nm)) is linear to Co(II) concentration in the range of 0.012-1.44 microg/mL. The detection limit is 0.0023 microg/mL. A novel luminescence method has been proposed for the determination of cobalt in Vitamin B(12) samples, with satisfactory results.
Jiang
Zhiliang
Z
Department of Resource and Environmental Science, Guangxi Normal University, Guilin 541004, PR China. zljiang@mailbox.gxnu.edu.cn
Sun
Shuangjiao
S
Liang
Aihui
A
Kang
Caiyan
C
Huang
Zhi
Z
D002413:Cations, Divalent / Q000737:chemistry; D002614:Chelating Agents / Q000737:chemistry*; D003035:Cobalt / Q000032:analysis*; D004050:Ditiocarb / Q000737:chemistry*; D005453:Fluorescence; D019216:Metals, Heavy / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D012680:Sensitivity and Specificity; D012996:Solutions / Q000032:analysis; D013050:Spectrometry, Fluorescence / Q000379:methods*; D014805:Vitamin B 12 / Q000032:analysis
D002413:Cations, Divalent; D002614:Chelating Agents; D019216:Metals, Heavy; D012996:Solutions; D003035:Cobalt; D004050:Ditiocarb; D014805:Vitamin B 12