1 Method Summary
After proper pretreatment, the sample is injected into a graphite tube atomizer. Cadmium ions in the sample are vaporized and dissociated into atomic vapor at high temperature inside the graphite tube. Ground-state atoms of the target analyte absorb resonance radiation emitted from a cadmium hollow cathode lamp, and the absorbance is proportional to cadmium concentration within a certain range.
2 Scope of Application
This method is applicable to the determination of cadmium in surface water.
3 Reference Standard
GB/T 5750.6-2006 Standard Examination Methods for Drinking Water – Metal Parameters
4 Testing Instruments
· Graphite Furnace Atomic Absorption Spectrometer 1 unit — Cadmium hollow cathode lamp
· Circulating cooling water system 1 unit Rated pump flow rate: 3.5 L/min
