摘要
研究了Pb2+与S2-反应体系的Tyndall散射光谱.结果发现,在TritonX-100存在下,PbS微乳体系在396nm处Tyndall散射光强度与Pb2+浓度呈线性关系,据此建立了Tyndall散射光检测痕量Pb(Ⅱ)的新方法.方法的线性范围为9.44×10-3～5.5μg ml,相关系数r=0.9991,检出限为2.83×10-3μg ml,RSD=1.06%,样品加标回收率为94.00%～97.00%.方法简便,灵敏度高.
Tyndall light scattering spectra of Pb^(2+) with S^(2-) is studied.Based on that PbS particle forms an intense Tyndall light-scattering(TLS),is formed which is steadied by the TritonX-100.A light scattering peak at 396nm is found,and the enhanced intensity of TLS at this wavelength is proportional to the concentration of Pb(Ⅱ). The linear range of the calibration curve is 9.44×10^(-3)～5.5μg/ml with the detection limit of 2.83×10^(-3)μg/ml for the Pb(Ⅱ).The RSD and the Recovery is 1.06%,94.00%～97.00% respectively.Four samples of environmental water are determined satisfactorily.
出处
《南华大学学报（理工版）》
2003年第4期52-54,共3页
Journal of Nanhua University(Science & Engineering)
