微波消解-石墨炉原子吸收光谱法测定壳聚糖膜中铜离子含量

目的：建立微波消解-石墨炉原子吸收光谱测定壳聚糖膜中铜离子含量的方法。方法：采用微波消解法对样品膜进行消解，在波长327.4 nm处，用石墨炉测定样品模中铜离子的含量。结果：本方法线性关系良好，相关系数r2=0.999 3，检出限为0.096 mg/g。铜离子回收率为72.78%～90.91%。结论：该方法具有快速、简单、准确、无污染等优点，可用于测定壳聚糖膜对铜离子的选择性吸附量。

Determination of Copper Ion in Chitosan Membrane by Microwave Digestion and Graphite Furnace Atomic Absorption Spectrophotometry

Objective: To establish a method for the determination of copper ion in chitosan membrane by microwave
digestion and graphite furnace atomic absorption spectrophotometry. Method: The chitosan membrane was dissolved by
microwave digestion before analysis by graphite furnace atomic absorption spectrophotometry at a wavelength of 327.4 nm.
Result: This method had good linearity with a correlation coefficient (r2) of 0.999 3, and the limit of detection (LOD) was
0.096 μg/g. Recoveries from spiked samples ranged from 72.78% to 90.91%. Conclusions: This method is rapid, simple,
accurate pollution-free and suitable for the determination of copper in chitosan membrane.