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制定了火焰原子吸收测定作为钨合金的原料高纯钴粉中痕量铁、镍的方法。试样用硝酸(1+1)溶解后不加干扰抑制剂,而采用标准加入法消除钴基体的干扰。方法具有引入试剂少、操作简便等特点,精密度、准确度均好。仪器与试剂 PE ICP/5500型原子吸收光谱仪;铁、镍空心阴极灯。仪器工作条件列于表1。硝酸(优级纯);铁标准储存溶液:称取1.0000g金属铁(99.99％),溶于50mL硝酸(1+1)中,用水定容至1000mL,此溶液含1mg/mL铁;镍标准储存
Developed a flame atomic absorption spectrometry as a raw material tungsten alloy high purity cobalt powder trace of iron, nickel method. Sample with nitric acid (1 + 1) dissolved without interference inhibitors, and the use of standard addition method to eliminate the interference of the cobalt matrix. The method has the advantages of less reagent introduction, simple operation and the like, and the precision and the accuracy are both good. Instruments and reagents PE ICP / 5500 atomic absorption spectrometer; iron, nickel hollow cathode lamp. Instrument working conditions are listed in Table 1. Nitric acid (superior grade pure); Iron standard stock solution: Weigh 1.0000g of metallic iron (99.99%) and dissolve it in 50mL of nitric acid (1 + 1) and dilute to 1000mL with water containing 1mg / store