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锡基轴承合金中铜、铁、铅的测定,以往采用溴赶锡后测定,方法费时,对人体有害,对微量元素的测定误差大。本法用火焰原子吸收法在不分离基体元素锡、锑的情况下直接测定铜、铁、铅。铜含量较高时(6—8%),采取将燃烧器偏角30°的方法测定。分析步骤称取0.1000克试样于150毫升烧杯中,加入20毫升盐酸(1+1)、2毫升硝酸至试样完全分解,煮沸片刻,冷却,移入100毫升容量瓶中定容。按表所列工作条件与标准溶液同时测量吸光度,并计算测定结果。
Tin-based bearing alloy copper, iron, lead determination, the past determination of bromine with tin after the test method time-consuming, harmful to humans, the determination of trace elements of the error. This method uses flame atomic absorption spectrometry to directly measure copper, iron and lead without separating the matrix elements tin and antimony. When the copper content is high (6-8%), the burner angle is taken at 30 °. Analysis step Weigh 0.1000 grams of sample in a 150 ml beaker, add 20 ml of hydrochloric acid (1 + 1), 2 ml of nitric acid to the sample completely decomposed, boiled a moment, cooled and transferred to a 100 ml volumetric flask to volume. The working conditions listed in the table with the standard solution at the same time measuring absorbance, and calculate the measurement results.