广西藤县古龙镇八角中36种元素含量测定及相关性评价

Determination and correlation evaluation of 36 elements content in Illicium verum in Gulong Town,Teng County,Guangxi Province

以八角(Illicium verum Hook.f.)为试验材料,采用电感耦合等离子体质谱(ICP-MS)法测定八角中36种元素含量并分析元素之间的相关性。结果表明,八角中36种元素的检出限为0~4.484 6 mg/kg,定量限为0.000 1~14.948 8 mg/kg,平均加标回收率为99.12%~104.25%,该方法在一定浓度范围内线性关系良好,相关系数均大于0.996 0。八角中常量元素含量最大,其次是重金属元素,含量最小的为稀土元素。八角中大多数元素与其他元素都存在显著正相关关系,存在显著负相关关系的只有Na与Mg、Ni,Mg与Sn。稀土元素主要分为2类,第一大类元素包括La、Ce、Pr、Nd、Sm、Gd、Tb,第二大类元素包括Dy、Ho、Er、Tm、Yb、Lu。主成分分析结果表明,第一主成分中Cr、Fe、Co、Ge、La、Ce、Pr、Nd、Sm、Gd占比较大,第二主成分中Ho、Er、Tm、Yb占比较大,第三主成分中Al、K、Mn占比较大,第四主成分中Cd、Sb占比较大,第五主成分中As占比较大。该方法快速、准确、操作简单,达到检测要求。

Using Illicium verum(Illicium verum Hook.f.)as the experimental material,the content of 36 elements in Illicium verum was determined by inductively coupled plasma mass spectrometry(ICP-MS)and the correlation between elements was analyzed.The results showed that the detection limits of 36 elements in Illicium verum were 0~4.484 6 mg/kg,the quantification limits were 0.000 1~14.948 8 mg/kg,and the average spiked recovery rates were 99.12%~104.25%.This method had a good linear relationship within a certain concentration range,with correlation coefficients greater than 0.996 0.Illicium verum had the highest content of constant elements,followed by heavy metal elements,and the lowest content was rare earth elements.Most elements in Illicium verum had significant positive correlations with other elements,while only Na and Mg,Ni,and Mg and Sn had significant negative correlations.Rare earth elements were mainly divided into two categories,with the first major category including La Ce,Pr,Nd,Sm,Gd,Tb,and the second major category of elements included Dy Ho,Er,Tm,Yb,Lu.The results of principal component analysis showed that Cr,Fe,Co,Ge,La,Ce,Pr,Nd,Sm,and Gd accounted for a large proportion in the first principal component,Ho,Er,Tm,and Yb account for a large proportion in the second principal component,Al,K,and Mn accounted for a large proportion in the third principal component,Cd and Sb accounted for a large proportion in the fourth principal component,and As accounted for a large proportion in the fifth principal component.This method was fast,accurate,and easy to operate,meeting the detection requirements.