作　　者： ; ; (郭越生）; (张展霞）;

机构地区： 中山大学化学与化学工程学院化学系

出　　处： 《中山大学学报论丛》 1990年第1期189-193,共5页

摘　　要： 本文研究了海水基体和共存离子对镍和钒的影响,选用酒石酸、乙酸铵分别作为镍和钒的基体改进剂。未加基体改进剂前,海水镍回收率只有77％,钒的测量精度为11％;加人改进剂后均有改善。采用塞曼效应背景校正技术,热解涂层石墨管,建立了石墨炉原子吸收直接测定海水镍和钒的分析方法。镍和钒的特征质量值(mo)分别为8.4pg和17pg;实际检测限:镍为0.25μgL^(-1)和钒为0.41μgL^(-1)。回收率镍为86～110％,钒为88～106％范围。最大相对标准偏差为谋5.5％,钒4.2％。 A direct determination of Ni and V in seawater by graphite furnace atomic absorption spectrometry（GFAAS） is described. To eliminate the seawater matrix interferences, tartaric acid for Ni and ammonium acetate for V were selected as the matrix modifiers. Zeeman-effect background correction, tube-wall atomization, integrated absorbance measurement and pyrolytically coated graphite tube were applied. The average characteristic mass values （mo） for Ni and Vare 8.2 pg and 17 pg respectively. The detection limits for Ni and V in seawater are 0.12 μg L^-1 and 0.4 μg L^-1 respectively. Ni and V were successfully determined in 16 seawa- ter samples with an average recovery of 98% and a relative standard deviation of 5%.

关 键 词： 镍 钒 石墨炉原子吸收光谱法 海水 基体改进剂 酒石酸 乙酸铵

领　　域： [文化科学] [文化科学]