Citation:
LIU Yun-Mei, YANG Jing, GAO Zhi-Ping. Determination of Co(Ⅱ) in Co(Ⅱ)-PAN-SDBS System by Resonance Rayleigh Scattering[J]. Chinese Journal of Applied Chemistry,
;2007, 24(12): 1467-1469.
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The RRS intensity was enhanced greatly when Co(Ⅱ) reacted with PAN to form cation chelate complex which further reacted with SDBS to form an ion-association complex in a pH=9.0 Tris-HCl buffer solution,and the RRS intensity was linearly related to the concentration of Co(Ⅱ) in a range of 0~5.0×10-7 g/mL(r=0.998 0).Based on this fact,a sensitive and simple RRS method for the determination of Cobalt(Ⅱ) was proposed with a detection limit of 2.68×10-9 g/mL.This method was applied to the determination of cobalt in human hair,tea leaves and vitamin B12 with a recovery of 97.83%~105.4%.This method has the advantages of high sensitivity and simplicity,and it was applied to the determination of Co(Ⅱ) in same biological samples with satisfactory results.
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