1-亚硝基-2-萘酚为配合剂流动注射固相富集原子吸收光谱法测定铜和钴

Determination of Copper and Cobalt by Flow Injection on Line Sorbent Preconcentration Coupled with AAS Using 1 Nitroso 2 Naphthol

本文研究了 用１亚 硝基２萘酚 为配合剂， Ｃ１ ８ 键合硅胶为 固相富集材料，流动 注射在线固相萃 取预富集火焰原子吸收测定痕量 铜和钴的方法。该 方法自动化程度高， 选择性强。方法的采 样速度达９０ｈ－ １ 时，铜和钴的富集 倍数分别达 ２０倍和１８倍， 检出限分别 达１．８μｇ／ Ｌ 和３μｇ／ Ｌ。用这一方 法来测定 生物样品 淡菜、钢样 Ｎ Ｂ Ｓ３６４和 Ｎ Ｂ Ｓ３６２等标准样品，结果与标准值相符。

Nitroso 2 naphthol (NN) has been tested as a complexing agent for on line preconcentrating copper and cobalt on RP- C 18 material in a microcolumn with FI FAAS system. The on line formed metal NN complexes can be adsorbed on the C 18 sorbent material. The adsorbed metal NN complexes were eluted with ethanol into the nebulizer of AAS. A good precision ( 1.7%,2.1%, for n = 10), high enrichment factor (20,18) with detection limit 1.8μg/L,3μg/L for Cu 2+ ,Co 2+ respectively and sample through put (90h -1 ) were obtained. The method was applied on the standard reference material for the determination of copper and cobalt. The results were in good agreement with the certified values.