This standard specifies the method for the determination of niobium content in titanium alloys. This standard applies to the determination of niobium content in titanium alloys. Measuring range: 0.20% to 3.00%.
GB/T 4698.22-1996 history
2017GB/T 4698.22-2017 Methods for chemical analysis of titanium sponge ,titanium and titanium alloys—Part 22:Determination of niobium content—5-Br-PADAP spectrophotometry and inductively coupled plasma atomic emission spectrometry
1996GB/T 4698.22-1996 Sponge titanium, titanium and titanium alloys--Determination of niobium content--2-(5-Bromo-2-pyridylazo)-5-Diethylaminophenol spectrophotometric method