原子吸收光谱法测定荸荠、莲藕、莲子中铁、锌、钙的含量

Determination of Iron,Zinc and Calcium in Water Chestnut,Lotus Root and Lotus Seed by AAS

实验采用原子吸收光谱法测定荸荠、莲藕、莲子中的铁、锌、钙的含量,在样品处理过程中,采用湿法消化法和干法灰化法这两种处理方法进行多元素的消解,并对这两种样品处理方法的操作效果及测定结果进行比较,在本实验的条件下,铁的线性关系是0．1～5．0 mg/L,检出限为0．19 mg/L;锌的线性关系是0．2～1．0 mg/L,检出限为0．04 mg/L;钙的线性关系是0．5～14．0 mg/L,检出限为0．22 mg/L．回收率在90．6%～103．2%范围内．

The content of Iron, Zinc and Calciuma wins tested in water chestnut, lotus root and lotus seed by Atomic Absorption Spectrometry. The wet digestion method and the fire ashes method had been chosen to digest varieties of elements of the sample and the two methods had been compared in the operation results and determination results. The optimum conditions that had been studied in the experiment, the linear range for Fe（ Ⅱ） and the detection limit were 0.1-5.0 mg/L and 0.19 rag/L; the linear range for Zn（ Ⅱ） and the detection limit were 0.2-1.0 mg/L and 0.04 mg/L; the linear range for Ca（ Ⅱ）and the detection limit were 0.5-14.0 mg/L and 0.22 mg/L with the recovery of 90.6% to 103.2%.