This standard GB/T 223.41-1985 specifies a method for the determination of tantalum in steel and alloys, using ion exchange separation-pyrogallol photometry. It is suitable for the determination of tantalum in steel, alloy steel, superalloys and precision alloys, with a range of 0.50% to 2.00%. Method The content of tantalum is determined by reacting with pyrogallol in an acidic solution to form a yellow complex. In order to eliminate the interference of iron, titanium, niobium, molybdenum, tungsten and other elements, it is separated by ion exchange method. The standard also provides detailed preparation methods of reagents, including potassium pyrosulfate, muriatic acid, hydrofluoric acid, pyrogallol solution, etc., to ensure the accuracy and Reliability of analytical results.