【摘要】 混合碱样品用无二氧化碳蒸馏水溶解后,加入过量标准盐酸溶液,用氢氧化钠标准溶液滴定过量的盐酸,测定混合碱总的耗酸量;再取另一份稀释后的溶液,在线连续与过量的稀盐酸混合产生二氧化碳,通过使用气态进样方法的电感耦合等离子体原子发射光谱测定总的含碳量,通过求解有关总耗酸量和总含碳量的方程,混合碱中的碳酸钠和碳酸氢钠的含量被获得。方法测定碳的线性范围为0.01～250μg/mL,碳的检出限为0.035μg/mL。用该方法测定真实样品中碳酸钠和碳酸氢钠的含量,与氯化钡分离法的测定结果有很好的吻合;测定结果的相对标准偏差范围分别为:碳酸氢钠2.8%～3.3%;碳酸钠3.2%～4.4%。更多还原

【Abstract】 The mixed base samples were dissolved in distilled water without carbon dioxide,and then the standard solution of hydrochloric acid was added in it.The excessive hydrochloric acid was titrated with standard solution of sodium hydroxide so that the total amount of acid consumed by mixed base was measured.Another diluted solution was mixed with excessive diluted hydrochloric acid on line,and the content of carbon in carbon dioxide produced in the process was determined by inductively coupled plasma atomic emission spectrometry coupled with gas sampling method.On the basis of on the equations of total consumed acid and carbon,the content of sodium carbonate and sodium bicarbonate in mixed base could be obtained.The linear range of method for carbon was 0.01-250 μg/mL with the detection limit of 0.035 μg/mL.The determination results of sodium carbonate and sodium bicarbonate in actual sample by this method were in good agreement with those obtained by barium chloride separation method.The relative standard deviations(RSD) were 2.8 %-3.3 % and 3.2 %-4.4 % for sodium carbonate and sodium bicarbonate,respectively.更多还原