石墨炉原子吸收法测定壳聚糖中的痕量镉

GFAAS Determination of Trace Amount Cadmium in Chitosan

采用石墨炉原子吸收法直接测定了壳聚糖中的痕量镉 ,以HF HClO4 体系消化试样 ,用Pd (NO3) 2 作基本改进剂 ,灰化温度 1 0 0 0℃ ,原子化温度 2 2 0 0℃。本法相对标准偏差为 2 8% ,回收率在 97 0 %～ 1 0 6 3 %之间 ,快速 ,简便 ,准确。

Trace amount cadmium in chitosan has been determined by graphite furnace atomic absorption spectrometry (GFAAS) with Pd(NO 3) 2 as a matrix modifier. The relative standard deviation of this method is 2 8% and the recover rate is 97 0%～106 3%. The method is simple, rapid and with accurate results.