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近年来,对铝-铬天青S-阳离子型、非离子型表面活性剂吸光光度性质已进行了详细研究,并广泛应用于测定岩石、矿物、金属及合金中微量铝。但应用于大量铜、锡条件下测定微量铝时,困难较大,必须进行分离。本文探讨了铝-铬天青S-Triton X-100体系用于吸光光度法测定微量铝的有关条件及消除干扰的试验,采用硫代硫酸钠、氯化铵-乳酸联合掩蔽剂消除大量铜、锡的干扰,直接测定铜合金中的微量铝。
In recent years, the spectrophotometric properties of aluminum-chromium azure S-cationic and non-ionic surfactants have been studied in detail and are widely used in the determination of trace aluminum in rocks, minerals, metals and alloys. However, when applied to the determination of trace aluminum under a large amount of copper and tin, it is more difficult and must be separated. In this paper, aluminum-chromium azure S-Triton X-100 system for the determination of trace aluminum by spectrophotometric determination of the relevant conditions and elimination of interference test, the use of sodium thiosulfate, ammonium chloride - lactic acid masking agent to eliminate a lot of copper, Tin interference, direct determination of trace aluminum in copper alloys.