GB/T 13747.19-2017 "Methods for chemical analysis of zirconium and zirconium alloys, Part 19: Determination of titanium content, diantipyrine methane Spectrophotometric method, spectra-trophotometry and Inductance coupled plasma atomic emission spectroscopy (AES) method" specifies the determination method of titanium content in zirconium and zirconium alloys. The scope of application includes 0.0020% to 0.025% and 0.0050% to 0.20%. The standard details the determination principles and procedures of diantipyrine methane Spectrophotometric method, spectra-trophotometry and Inductance coupled plasma atomic emission spectroscopy (AES) method, providing technical guidance for arbitration and routine analysis, and is suitable for quality control of related products.