Determination of Chromium in Vegetables by Microwave Digestion and Zeeman Graphite Furnace Atomic Absorption Spectrometry

Using microwave digestion method to treat samples,and using Zeeman graphite furnace atomic absorption spectrometry(ZGFAAS) to determine chromium in vegetables.The results showed that when concentration of chromium was in a range of 0~25 μg/L,its linearity was great,correlation coefficient was larger than 0.999 5,recovery of standard addition was 96.2%~103.9%,RSD was 2.2%,and detection limit was 0.138 μg/L.This method has some advantages such as simple,rapid and accurate and reliable results.