FAAS法测定红花籽及红花籽粕中的八种金属元素

Determination of eight metal elements in safflower seed and safflower meal by FAAS method

为研究红花籽及副产物中的微量元素营养成分,本文拟用HNO3＋HCl O4混合酸体系消化处理红花籽及红花籽粕样品,采用空气-乙炔火焰原子吸收光谱法（FAAS）测定样品中的钠、钾、钙、镁、锰、铁、铜、锌八种金属元素含量。结果显示,红花籽及红花籽粕中均含有丰富的微量元素,二者含量高低顺序均为K〉Ca〉Mg〉Fe〉Zn〉Na〉Mn〉Cu。与红花籽相比,红花籽粕中的锌元素明显低于红花籽,其他七种元素含量均稍高于红花籽。该方法的加标回收率在91.2%~107.4%之间,测定的相对标准偏差小于3.5%,线性相关系数均大于0.999,本法可用于红花籽及红花籽粕中八种金属元素含量的测定。

Microelement nutrients of safflower seed and byproduct were studied.Samples were digested by HNQ and HCIO4 mixed acid, then the contents of eight metal elements （sodium, potassium, calcium, magnesium, manganese, iron, copper, zinc）in safflower seed and safflower meal were determined by air-acetylene flame atomic absorption spectrometry（ FAAS）.The results showed that the metal elements were rich in safflower seed and safflower meal.Content of the sequence was both K 〉 Ca 〉 Mg 〉 Fe 〉 Zn 〉 Na 〉 Mn 〉 Cu. Compared with safflower seed, Zn in safflower meal was significantly lower than that of safflower meal, other seven elements contents were slightly higher than that of safflower seed.The recoveries ranged from 91.2% to 107.4% and RSD was below 3.5%.The correlation coefficients was more than 0.999.1t could be concluded that the method could be applied to determine eight metal elements in safflower seed and safflower meal.