GB/T 17137-1997 focuses on the determination of total chromium in soil mass, using flame Atomic absirption spectropho-tometry, AAS. First, the soil sample is pretreated to convert the chromium into a solution state. Flame atomization is used to make chromium atomization, and with the help of spectrophotometer, Absorbance is determined based on the principle of chromium atom absorption of specific wavelengths of light, and then the total chromium content of soil is accurately calculated. This standard provides a key detection method for soil mass assessment and pollution monitoring, helping to grasp the situation of soil chromium pollution and protect the soil ecological environment.