Abstract:A method for the direct determination of trace cadmium in amber by graphite furnace atomic absorption spectrometry (GFAAS) with slurry sampling was described. Palladium nitrate was used as a matrix modifier to eliminate the interference. Slurry stability and the influences of the matrix modifier, ashing/atomization temperature and coexistent ions on analytical signals were investigated in detail. Under the optimized experimental conditions, the detection limit of this method was 9.4 ng·g-1 with a precision of 6.1%.
[1] XIAO Shi-yu, et al(肖诗宇, 等). Journal of Gems and Gemmology(宝石和宝石学杂志), 2000, 2(4): 27. [2] CAO Ke-qing(曹克清). Shanghai Geology(上海地质), 2000, 73(1): 15. [3] Edwards H G M, Farewell D W. Spectrochim. Acta, Part A, 1996, 52: 1119. [4] GUO Shi-qing, et al(郭时清, 等). Journal of Fudan University(Natural Science)(复旦大学学报·自然科学版), 1991, 30(3): 271. [5] YAO Jin-bao, SONG Jing-yuan, ZHOU Jing-ru(姚金宝, 宋静媛,周静茹). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 1990, 10(1):27. [6] WENG Li, ZHAI Guo-qing(翁 黎, 翟国庆). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2005, 25(4):567. [7] DENG Shi-lin, LI Xin-feng, ZHOU Ping(邓世林, 李新凤,周 平). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 1996, 16(3):106. [8] LIU Hong-wang, PAN Zhen-qiu, FENG Jia-li(刘红望, 潘振球,冯家力). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 1997, 17(3):82.