This International Standard specifies a secondary-ion mass spectrometric method using magnetic-sector or quadrupole mass spectrometers for depth profiling of boron in silicon, and using stylus profilometry or optical interferometry for depth scale calibration. This method is applicable to single-crystal, poly-crystal or amorphous-silicon specimens with boron atomic concentrations between 1 × 10 atoms/cm and 1×10 atoms/cm, and to crater depths of 50 nm or deeper.