测定锡青铜(QSn7—0.2)中的微量铋,多采用硫脲法和马钱子硷法。前者干扰较少,但灵敏度较低;后者灵敏度较高,但离子干扰特别是铜的干扰较严重,分离不净会使结果偏高。用原子吸收分光光度法测定铋,灵敏度虽不高,但经富集后,还是能满足要求的。这种方法稳定、简便,测定范围为0.00×～0.00×％。 Determination of tin bronze (QSn7-0.2) in trace amounts of bismuth, thiourea method and strychnine use more. The former has less interference, but lower sensitivity; the latter has higher sensitivity, but the interference of ion interference, especially copper, is more serious. The separation is not good and the result will be high. Determination of bismuth by atomic absorption spectrophotometry, although the sensitivity is not high, but after enrichment, or to meet the requirements. This method is stable and simple, the determination of the range of 0.00 × to 0.00 ×%.