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研究了在 pH =6 .0的HAc_NaAc的缓冲体系中 ,Fe(Ⅲ )与乙二醇二乙醚二氨基四乙酸 (EGTA) ,邻苯三酚红 (PR) ,溴化十六烷基吡啶 (CPB)形成四元络合物的性质 .利用一阶导数光谱法对微量铁进行了测定 ,测定的线性范围为 0 .4～ 4.0 μg/mL ,变异系数为 4.3% .此方法用于石英砂中微量铁的测定 ,结果满意 .
In the buffer system of HAc_NaAc with pH = 6.0, the effect of Fe (Ⅲ) on the degradation of EGc, pyrogallol CPB). The trace iron was determined by first-order derivative spectrometry and the linear range was 0.4-4.0 μg / mL with a coefficient of variation of 4.3%. This method was applied to quartz sand Determination of trace iron, the results are satisfactory.