悬浮液进样-FAAS测定不同年限党参中的4种微量元素

Determination of Microelements in Different Age Codonopsis by FAAS with Suspension Sample Introduction

为了探讨不同生长年限对党参质量控制的影响,同时建立快速测定党参中微量铁、铜、锌、锰的方法。采用悬浮液进样-FAAS用于党参样品的测定,悬浮于琼脂胶体中,直接喷入空气-乙炔火焰中,用标准加入法测定。不同生长年限的党参中微量元素的含量变化存在一定的规律性,这主要与中药材的生长年限有关,其次与中药材的产地有关;Fe元素含量较高,而Cu、Zn、Mn的含量远低于Fe,随着种植年限的增长Fe的含量不断下降;而Zn的含量变化趋势则因产地的不同而不同,Cu和Mn的含量随生长年限的增大而下降但规律性不是很明显。不同生长年限的党参中微量元素的含量变化存在一定的规律性;本法用于党参中微量铜、铁、锌、锰的测定,快速、准确、无污染、试剂用量少,能广泛应用于中草药中微量元素的测定。

The method for determination of iron,copper,zinc and manganese in codonopsis was investigated by FAAS with suspension sample introduction.The codonopsis was suspended in agar sol,and injected into air-acetylene flame by standard addition method.The microelements content of codonopsis of different age existed some rule,that was relation to the different age of medicinal materials,and relation to different producing area.The content of Fe was hightest,and the contents of Cu,Zn,Mn were far lower than Fe,along with the age the content of Fe coming down.Trend of the content of Zn depended on the different producing area.The contents of Cu and Mn came down along with the age,but the rule was not obvious.The contents of microelements in codonopsis of different age had some rule.This method is convenient,rapid,cleanness and fewer solvent,that was widely applied to determine microelements in Chinese medicinal herb.