气态和雾化进样相结合——电感耦合等离子体发射光谱法测定混合碱中的碳酸钠和碳酸氢钠含量

【作者】 段旭川；

【机构】 天津师范大学化学与生命科学学院；

【摘要】 混合碱样品溶解在无二氧化碳蒸馏水中,使其和过量稀盐酸溶液在线混合反应,该混合溶液经30PSI 的较低雾化器压力下雾化,使碳酸根和碳酸氢跟由于被酸化成二氧化碳成为气相进样,使灵敏度提高;而钠以常规雾化形式进样并使测定灵敏度降低;两个元素同时被 ICP-AES 测定。通过求解有关钠和碳的两个方程,可间接测定混合碱中的碳酸钠和碳酸氢钠的含量。该方法快速,准确,用该方法分析样品所得的结果和氯化钡分离法所得的结果有很好的吻合。更多还原

【Abstract】 The mixed alkali sample was dissolved in CO₂-free distilled water and was reacted with diluted hydrochloric acid,the solution was sprayed by a H-G nebulizer at 206.9KP pressure,the carbon in the form of gases carbon dioxide was introduced into plasma and had a higher sensitivity of determination and Sodium in the form of aerosol generated by conventional nebulizer-sprey was introduced Into plasma and had a lower sensitivity of determination.After two elements were Simultaneously determined,the contents for sodium carbonate and sodium hydrogen carbonate were obtained by solved two equations for carbon and sodium.The proposed Method is quick and accuracy.The results of determination of sample by this method Were very close to those measured by titration methods using Barium chloride for separation carbonate ion.更多还原