Atomic absorption spectrometric determination of trace tellurium after hydride trapping on platinum-coated tungsten coil

作者：Xi Maoyang; Liu Rui; Wu Peng; Xu Kailai; Hou Xiandeng; Lv Yi^*

来源：Microchemical Journal, 2010, 95(2): 320-325.

DOI：10.1016/j.microc.2010.01.009

• Hydride trapping
• Atomic absorption spectrometry
• Tungsten coil
• Platinum permanent chemical modifier
• Tellurium

In this work, a sensitive and simple method for the determination of tellurium was developed by hyphenation of electrically heated quartz tube atomic absorption spectrometry and tellurium hydride trapping on platinum-coated tungsten coil. With a mixture of Ar and H(2). tellurium hydride was transported to tungsten coil for trapping at 390 degrees C and releasing at 1200 degrees C A limit of detection (LOD, 3 sigma) of 0.08 ng mL(-1) was obtained with 1 min trapping (1 5 mL sampling volume), and enhancement factor was 28 compared to conventional hydride generation atomic absorption spectrometry The LOD was better or at least comparable to literature levels involving on-line trapping and some other sophisticated instrumental method such as graphite furnace atomic absorption spectrometry (GF-AAS) and inductively coupled plasma mass spectrometry (ICP-MS), and it can be further lowered down to 0.03 ng mL(-1) by increasing the trapping time to 4 min The platinum coating was stable for 300 firings without sensitivity loss Interference and its alleviation were studied in detail The proposed method was applied

• 出版日期2010-7
• 单位四川大学