【摘要】 采用胶体化学方法合成还原性谷胱甘肽(GSH)稳定的Cd Se纳米量子点,所合成的Cd Se量子点对痕量的六价铬具有灵敏的荧光猝灭作用。以Cd Se量子点为荧光探针,建立一种简单快速测定生活饮用水中痕量六价铬的检测方法。在0.05~2.0μg·L-1范围内,Cd Se量子点的荧光强度变化值与生活饮用水中六价铬的含量呈线性关系,方法的检出限为0.01μg·L-1,样品测定的相对标准偏差小于5%,加标回收率在97~104%之间。该方法能够快速灵敏检测生活饮用水中的痕量六价铬,具有重现性好,定量准确灵敏等优点。更多还原

【Abstract】 Cd Se quantum dots capped by GSH were synthesized in aqueous solution,which have a sensitive fluorescence quenching effect on trace Cr( VI). This paper reports a new,simple and rapid method to determine trace Cr( VI) in drinking water using Cd Se fluorescence quantum dots. The linear range of the proposed method was validated in the range 0. 05 ~ 2. 0 μg·L-1. The relative standard deviation was less than 5%; the recovery varied between 97 and 104% and the detection limit was 0. 01μg·L-1. The method is able to accurately determine trace Cr( VI) in drinking water with a lot of advantages,such as good reproducibility,accurate quantization et al.更多还原