【摘要】 采用羟基磷灰石微型柱的流动注射系统与火焰原子吸收光谱联结对工业废水中铅进行预浓集测定。在进样时,被分析物沉积在羟基磷灰石微型柱上,并通过注射半胱氨酸(碱性条件下)予以洗脱。该方法成功地应用于工业废水的分析。通过回收实验,标准物质分析等方法评价了准确度。4ml样品体积的检测限:为4μg/L(4mL/min),进样时间1min,2μg/mL和0.2μg/mL含量测定的相对标准偏差分别为1.5％和2.2％。更多还原

【Abstract】 A flow injection system incorporating a micro-column of hydroxyapatite was used in conjunction with flame atomic absorption spectrometry for the preconcentration and determination of lead in industrial waste water. The analyte was deposited on the hydroxyapatite micro-column (pH = 6-7) during the sampling stage and the elution was conducted by injection of L-cysteine (NH4OH 0. 56 mol/L). This procedure was successfully applied to the analysis of various industrial waste water samples and the accuracy was assessed through recovery experiments and the comparative analysis of a standard reference water. The detection limit based on a sample volume of 4ml (sampling time 1min at 4ml·min-1)was 4 μg·L-1 and the relative standard deviations at 2 and 0. 2 μg·ml-1 were 1. 5 and 2. 2%,respectively.更多还原