高频燃烧红外吸收法测定纯银及银合金中微量的碳硫

摘要

The content of carbon and sulfur in pure silver and silver alloy was analyzed by using infrared absorption, and the related analytical conditions were established. Under the given analytical conditions, the method has advantages of being accurate and time-saving. Satisfactory analytical results can be obtained for the samples containing carbon in the range of 0.005%~0.12% and sulfur in the range of 0.005%~0.099%. The relative standard deviation, standard addition recovery rate is 3.3%~10.9%, 91%~ 120% for carbon, and 2.8%~10%, 91%~120% for sulfur, respectively.%采用氯酸钾作助熔剂，经过高频燃烧后，用红外碳硫仪测定纯银及银基合金中的微量碳、硫，测定范围碳：0.005%~0.12%，硫：0.005%~0.099%。方法准确度高，相对标准偏差、加标回收率分别为碳：3.3%~10.9%、91%~120%；硫：2.8%~10%、91%~120%。