GB/T 7731.8-2008 standard specifies two methods for the determination of antimony content in ferrotungsten: Rhodamine B photometry and Inductance coupled plasma atomic emission spectroscopy (AES) method. Rhodamine B photometry is suitable for the determination of antimony content in the range of 0.010% to 0.060%, and the concentration of antimony is detected at 550 nm wavelength by chemical treatment and photometric measurement. Inductance coupled plasma atomic emission spectroscopy (AES) method is suitable for the determination of antimony content in the range of 0.010% to 0.15%, using Inductance coupled plasma light emission spectrometer to provide high-precision analysis results. These methods are important for ensuring the mass and performance of ferrotungsten.