Abstract：An advanced method for the determination of rare earth La and Ce in animal feed by using of inductively coupled plasma mass spectrometry was studied. The operation parameters for ICP-MS was optimized, the effect of pre-mix feed matrix and formular feed matrix for La and Ce was studied by the conventional method and stepwise dilution method, and the suppression of signal intensity of La and Ce by nitric acid was examined. Under the optimum condition, the limit of determination for La and Ce were 2.62×10-2μg·kg-1 and 6.47×10-3μg·kg-1,respectively, the linear coefficient was 1.000 0, the dynamical linear range was of 3 order of magnitudes, and the internal standards were In(115) and Tb(159). The developed method was applied to the determination of rare earth La and Ce in pre-mix feed and formular feed, with the recovery ≥77.8% and the relative standard deviation(RSD) ≤8.5%, and the testing results were satisfactory.
王培龙,苏晓鸥*. 电感耦合等离子体质谱测定饲料中稀土元素镧和铈的研究[J]. 光谱学与光谱分析, 2007, 27(11): 2341-2344.
WANG Pei-long,SU Xiao-ou*. Study on Determination of Rare Earth La and Ce in Feed by Using ICP-MS. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(11): 2341-2344.
[1] CHEN Zu-yi(陈祖义). Rural Eco-Environment(农村生态环境)，2004，20(4)：1. [2] YI Jian-min, YAN Jian-hui, ZHOU Ning-bo(易健民, 阎建辉, 周宁波). Fine Chemical Intermediates(精细化工中间体), 2003，33(3)：32. [3] BIAN Qun-zhou, PENG Su-biao, HE Bai-ling, et al(卞群洲，彭速标，贺柏龄，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2000，20(3)：357. [4] ZHANG Lin, WANG Jian-chen, XIN Ren-xuan(张 琳，王建晨，辛仁轩). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2005，25(10)：267. [5] CHEN Hang-ting, CAO Shu-qin, ZENG Xian-jin(陈杭亭，曹淑琴，曾宪津). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2000，20(3)：339. [6] YIN Ming, LI Bing, FU Ting-fa(尹 明，李 冰，符廷发). Journal of Analytical Science(分析科学学报)，1995，11(1)：13. [7] LIU Hu-sheng, SHAO Hong-xiang(刘虎生，邵宏翔). Technique and Application of ICP-MS(电感耦合等离子体质谱技术与应用). Beijing: Chemical Industry Press(北京：化学工业出版社)，2005. [8] HE Man, HU Bin, JIANG Zu-cheng(何 蔓，胡 斌，江祖成). Chemical Journal of Chinese Universities(高等学校化学学报)，2004，25(12)：2232. [9] HU Sheng-hong, LIN Shou-lin, LIU Yong-sheng(胡圣虹，林守麟，刘勇胜). Chemical Journal of Chinese Universities(高等学校化学学报)，2000，21(3)：368. [10] Evans E H, Giglio J J. J. Anal. Atom Spectom., 1993, 8: 1.
