Chen Shi-zhong
Key Laboratory, Wuhan Polytechnic University, Wuhan 430023, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2004 Oct;24(10):1267-9.
A method for direct determination of trace arsenic in coal by slurry-sampling Graphite-Furnace Atomic Absorption Spectrometry (GFAAS) was developed, using Pd as a matrix modifier. The effects of slurry stability, particle size of sample, matrix modifiers, ashing temperature, atomization temperature, and common coexisting components on the signal intensity of arsenic were investigated. Under optimized operating conditions, the detection limits and relative standard deviation of this method were 0.054 microg x g(-1) and 8.9%, respectively.
建立了一种用悬浮液进样石墨炉原子吸收光谱法(GFAAS)直接测定煤中痕量砷的方法,以钯作为基体改进剂。研究了悬浮液稳定性、样品粒度、基体改进剂、灰化温度、原子化温度以及常见共存成分对砷信号强度的影响。在优化的操作条件下,该方法的检出限和相对标准偏差分别为0.054μg·g⁻¹和8.9%。