【摘要】 在加热下用硝酸(1+1)-OP溶液溶解钠盐表面活性剂样品,配制成均匀透明的样品溶液。为消除电离干扰,取适量样品溶液加入消电离剂硝酸钾溶液配制成试液,喷入空气-乙炔火焰测定钠,建立了火焰原子发射光谱法直接测定钠盐表面活性剂中钠的分析方法。以空白溶液为参比,用工作曲线法测定。对样品溶解条件、电离干扰、试液与空白溶液粘度一致性进行了考察。测定结果的相对标准偏差小于2·4%,加标回收率97·8%~105·0%,线性范围0~1·6μg/mL,方法简便。更多还原

【Abstract】 A transparent and homogeneous sample solution was obtained by dissolving the surfactant of sodium salt in HNO3(1+1)-OP solution upon heating.To eliminate ionization interference the test solutions were prepared by adding KNO3 solution as deionization agent in appropriate amount of sample solution,and then injected into air-acetylene flame for the determination.The working curve method was applied to the determination and blank solution was used as the reference.The dissolving condition of sample,ionization interference,identity of viscosity for test solution and its blank solution,detection limit were studied.The relative standard deviations were found to be less than 2.4%.The recoveries obtained were in the range of 97.7%-105.0% and the linear range was in 0-1.6 g/mL.更多还原