PAR光度法测定合金钢中的铌,虽然准确度高,重复性好,回收率高,但操作周期长,手续繁琐.据本文的实验证明在其它条件不变的情况下,将马弗炉灼烧熔融沉淀物改为将沉淀与滤纸直接用高氯酸-硝酸破坏,再用硫酸-酒石酸处理成待测液.在保证方法的准确度、重复性的前提下,缩短了分析周期,简化了操作.适用于高合金钢中铌的测定. PAR spectrophotometric determination of niobium alloy steel, although the accuracy, repeatability, high recovery rate, but the long operating cycle, procedures cumbersome.According to the experimental results show that the other conditions remain unchanged, burning the muffle furnace Burning molten sediment instead of the precipitate and the filter paper directly perchloric acid - nitric acid damage, and then sulfuric acid - tartaric acid into the test solution to ensure the accuracy and repeatability of the premise, shorten the analysis cycle, simplified Operation Suitable for the determination of niobium in high alloy steel.