论文部分内容阅读
本文提出用石墨炉塞曼效应原子吸收法直接测定黄河水系(原水)中铜、铅、镉、铬、镍、钴、钼、铍、锑、锂、锡、钒、铁、锰、砷等金属元素。文中钢、镉、铬、镍、钴、钼、锑取混均水样10或20μl注入石墨炉直接用校准曲线法测定;铁、锰水样稀释数倍后取10μl进样校准曲线法测定;铅、锂、锡部分水样有干抗,标准加入法测定;存在干扰的元素铍加AI,钒加Na_2SiO_3作基体改进剂,砷加Ni(NO_3)_2使砷转化为稳定的金属互化物后校准曲线法或标准加入法测定。上述元素中回收率最低者在80%以上,变异系数最大者为9%。并对混均祥(原水)、澄清样、过滤样、消化样测定值进行了比较。本法无需化学处理,具有简单、快速,灵敏度高、选择性好、抗干扰强等优点。
This paper presents the direct determination of copper, lead, cadmium, chromium, nickel, cobalt, molybdenum, beryllium, antimony, lithium, tin, vanadium, iron, manganese, arsenic and other metals in the Yellow River water system by graphite furnace Zeeman effect atomic absorption spectrometry element. In this paper, 10 or 20μl of water sample mixed with water, such as steel, cadmium, chromium, nickel, cobalt, molybdenum and antimony, is directly measured by the calibration curve method; iron and manganese water samples are diluted several times and then taken by 10μl injection calibration curve method; Pb, Li, and Sn were partly anti-interference by standard addition method. There was interference elements Beryllium plus AI, vanadium plus Na_2SiO_3 as matrix modifiers, arsenic plus Ni (NO_3) _2 after transformation of arsenic into stable intermetallics Calibration curve method or standard addition method. Among the above elements, the lowest recoveries were over 80%, and the highest coefficient of variation was 9%. And Xiang Jun Xiang (raw water), clarified samples, filtration samples, digestion samples measured values were compared. This method does not require chemical treatment, with simple, fast, high sensitivity, good selectivity, strong anti-interference advantages.