微波消解-HR-CS AAS法测定几种调味品中的微量元素

Determination of Trace Elements in Some Seasonings by Microwave Digestion-high Resolution Continuum Source Graphite Furnace Atomic Absorption Spectrophotometry

摘要:

建立了使用微波消解样品，利用高分辨连续光源石墨炉原子吸收光谱法快速顺序测定几种调味品中的微量元素的方法。通过添加相应的基体改机剂来消除干扰。结果表明：仪器的检出限（Cu、Cd、Pb、Mn、Al）分别为1.22 ng/mL、0.077 ng/mL、1.53 ng/mL、0.614 ng/mL、1.54 ng/mL，加标回收率为95.2~106.4%，本法的精密度(RSD)均小于5.22%。该方法快速、准确、稳定、污染少，具有较高的实用价值，为食品中多元素快速顺序检测提供了科学依据。

Abstract:

An effective method was developed for sequential rapid determination of trace elements in some seasonings by microwave digestion-high resolution continuum source graphite furnace atomic absorption spectrophotometry. The interferences were eliminated by adding the corresponding matrix modifiers. Results showed that the instrument detection limits of Cu, Cd, Pb, Mn and Al were 1.22 ng/mL, 0.077 ng/mL, 1.53 ng/mL, 0.614 ng/mL and 1.54 ng/mL, respectively by this method. The recoveries were 95.2~106.4%. The precision relative standard deviations were less than 5.22%. Therefore, this method was rapid, accurate, stable and less pollution, and had a high practical value. It provided scientific basis for sequential rapid determination of many trace elements in food.