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在原子吸收分光光度法中,由于铝易形成难离解的氧化物,灵敏度非常低,一般不能使用空气-乙炔火焰法,而是采用能提供较高原子化温度的一氧化二氮-乙炔火焰法或石墨炉法进行铝的测定.但在操作一氧化二氮-乙炔火焰时较危险,以及用石墨炉法测含铝大于0.x%的样品时,对试液要进行高倍数的稀释,操作比较费时,文献[3]对空气-乙炔火焰原子吸收法测铝进行了初步探讨.文献[4]报道了以含氮化合物作为增敏剂对铝的测定.本文采用空气-乙炔火焰原子吸收法和CTMAB作增敏剂进行铝的测定研究.可使铝的灵敏度提高5～6倍,检出限为10μg·ml~(-1).实现了空气-乙炔火焰法测定锌合金中铝,结果满意.1 试验部分1.1 仪器与试剂PF2380型原子吸收分光光度计
In atomic absorption spectrophotometry, due to the formation of aluminum is easy to dissociate oxides, the sensitivity is very low, the general can not use the air - acetylene flame method, but can provide higher atomization temperature nitrous oxide - acetylene flame method Or graphite furnace method for the determination of aluminum.But in the operation of nitrous oxide - acetylene flame more dangerous, and the graphite furnace method for the determination of aluminum is greater than 0.x% of the sample, the test solution to be high-fold dilution, In the literature [3], aluminum was investigated by air-acetylene flame atomic absorption spectrometry [4] reported in the literature [4] for the determination of aluminum with nitrogen compounds as sensitizers.In this paper, air-acetylene flame atomic absorption France and CTMAB as sensitizers for the determination of aluminum can increase the sensitivity of aluminum 5 to 6 times the detection limit of 10μg · ml -1 achieved by air - acetylene flame method for the determination of zinc in aluminum, The results are satisfactory.1 Experimental Section 1.1 Instruments and Reagents PF2380 atomic absorption spectrophotometer