基于火焰原子吸收光谱法的芦笋中微量元素含量的测定

目的]用火焰原子吸收光谱法测定芦笋（Asparagus officinalisL.）中Cu、Fe、Zn、Ca、Mg、K微量元素含量,为芦笋的合理开发利用提供依据。方法]加入LaCl3和CsCl消除测定Ca、Mg和K时的干扰,以硝酸和过氧化氢为消解剂,采用高压密闭消解火焰原子吸收光谱法测定白芦笋、白芦笋罐头、绿芦笋及其嫩茎和花中Cu、Fe、Zn、Ca、Mg、K元素含量。结果]方法的回收率在91.2%～112.3%,相对标准偏差为1.43%～2.31%。芦笋加工为罐头后,Cu、Fe、Zn和Ca元素含量增大,K和Mg元素含量减少;绿芦笋中Cu、Fe、Zn、Ca、Mg、K元素含量均高于白芦笋;绿芦笋花中Cu、Zn、Ca和Mg含量明显大于茎中。结论]该研究可为芦笋的合理开发与利用提供依据。

Determination of Trace Elements in Asparagus(Asparagus officinalis L.) by Flame Atomic Absorption Spectrometry(FAAS)

Objective] Flame atomic absorption spectrometry was used to determine the levels of elements content in Asparagus officinalis L..Method] Asparagus officinalis L.samples were digested using nitric acid and hydrogen peroxide as solvents in high-pressure closed-vessel.LaCl3 and CsCl were used as releasing agent to eliminate chemical interference to calcium,magnesium and potassium determination.Result] The rate of recovery varied from 91.2% to 112.3%,and the relatively standard deviation was 1.43% to 2.17%.Th...