Abstract
A novel method of resonance light scattering (RLS) was developed for the analysis of trace metallothioneins (MTs) in human urine. In a CH3COOH–CH3COONa buffer solution of pH 4.5, the formation of a complex between levofloxacin (LEV)–Pd and MTs led to enhance the RLS intensity of the system, and the enhanced RLS intensity at 468nm was proportional to the concentration of MTs in the range of 0.059–22.4μgmL−1. The linear regression equation was ΔI=127.5 ρ (μgmL−1)–88.02 with a correlation coefficient of 0.9992, and the detection limit of 17.8ngmL−1. The relative standard deviation and the average recovery were 3.8–5.4% (n=11) and 92.15%, respectively. The proposed method is convenient, reliable and sensitive, and has been used successfully for the determination of trace MTs in human urine samples.
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