Patent ID: 11933777
Assignee: INSTITUTE OF SOIL SCIENCE, CHINESE ACADEMY OF SCIENCES
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method of constructing a model for predicting bioavailability of arsenic in site soil, comprising steps of: leveling soil after selecting a measuring point, vertically placing a measuring sleeve, fully supplying water to site soil to be measured, balancing for 20-40 min, measuring a water content in a soil volume not less than 40%, placing a piston DGT device into the measuring sleeve and pressing the device into soil, covering a top of the measuring sleeve with a wind shield, cleaning the piston DGT device after the measurement, analyzing a concentration of available arsenic by ICP-MS, and measuring available arsenic of soil; linearly fitting the available arsenic measured by a DGT method with human bioavailable arsenic measured by a UBM method, and obtaining a model for predicting bioavailability of arsenic in site soil: Log (As in an intestinal stage)=0.743 log (DGT-As)−0.598 Log Alo+0.837, where R2=0.852, P<0.001; wherein As in the intestinal stage is a content mg kg−1 of As available to human body in the intestinal stage in soil measured by the UBM method; DGT-As is a concentration μg L−1 of the available arsenic measured by the DGT device; Alo is a content g kg−1 of active aluminum in soil.