Kujirai O, Kobayashi T, Ide K, Sudo E
Metallurgical Chemistry Division, National Research Institute for Metals, Nakameguro, Meguro-ku, Tokyo 153, Japan.
Talanta. 1982 Jan;29(1):27-30. doi: 10.1016/0039-9140(82)80130-6.
A simple analytical method has been developed for the determination of traces of Te in complex heat-resisting alloys by graphite-furnace atomic-absorption spectrometry. Nickel-base and cobalt-base heat-resisting alloys are dissolved in concentrated hydrochloric and hydrofluoric acids plus 30% hydrogen peroxide. Tellurium is separated from the matrix by co-precipitation with As and dissolved in nitric acid. Memory effects are eliminated by the oxidation of Te(IV) to Te(VI). Standard solutions for the calibration are prepared by the procedure used for the sample solution. The detection limit for Te is 0.05 ppm in the alloy.
已开发出一种简单的分析方法，用于通过石墨炉原子吸收光谱法测定复杂耐热合金中的痕量碲。镍基和钴基耐热合金溶解于浓盐酸、氢氟酸和30%过氧化氢中。碲通过与砷共沉淀从基体中分离出来，并溶解于硝酸中。通过将Te(IV)氧化为Te(VI)消除记忆效应。校准用标准溶液按照制备样品溶液的程序配制。合金中碲的检测限为0.05 ppm。
