- Method Overview
The method of complete digestion with hydrochloric acid-nitric acid-hydrofluoric acid-perchloric acid is adopted to completely destroy the mineral lattice of the soil, so that the elements to be measured in the sample all enter the test solution. Then, the test solution is injected into the graphite furnace. Through the preset drying, ashing, atomization and other heating programs, the coexisting matrix components are evaporated and removed. At the same time, under the high temperature in the atomization stage, the lead compounds are dissociated into atomic vapor, which produces selective absorption of the characteristic spectral lines emitted by the hollow cathode lamp. Under the selected optimal determination conditions, the absorbance of lead in the test solution is determined by background correction.
- Scope of Application
Determination of Lead in Soil
- References
Digestion Methods: GB/T 17141-1997; HJ 832-2017
- Detection Instruments
Graphite Furnace Atomic Absorption Spectrophotometer(Lead Hollow Cathode Lamp)
