石墨炉原子吸收法测定钛铁矿中的微量镉

Determination of Trace Cadmium in Ilmenite by Graphite Furnace Atomic Absorption Spectrometry

摘要:

研究了石墨炉原子吸收测定钛铁矿中微量元素Cd的方法，探索了在高含量的Fe,Ti基体干扰下以NH4H2PO4-H2NCSNH2-EDTA为混合基体改进剂的最佳仪器工作条件。在取样0.2000g，定容25mL的条件下，方法检出限为0.006μg/g,用国家标准物质验证，其准确度（RE%）<10%,12次测定精密度（RSD%）<10%,加标回收率90%～110%之间，符合国家相关要求。

Abstract:

Determination of trace elements Cd in ilmenite deposit by using graphite furnace atomic absorption method has been studied, and the best instrument condition under the matrix interference with high content of Fe, Ti and NH4H2PO4-H2NCSNH2-EDTA mixed matrix modifier has been studied. In picking sampling 0.2000g, 25 mL volumetric conditions, the detection limit was 0.006μg / g, and using a national standard to verify, its accuracy (RE%) <10%, 12 times measured precision degree (RSD%) <10%, and the recovery is 90%~110%.