Application of orthogonal experiment design in optimizing the determination condition of lead in tea by graphite furnace atomic absorption spectrometry
objective To Inquire the optimal test conditions for the lead in tea by graphite furnace atomic absorption spectrometry(GF-AAS)and establish the accurate determination method for determination of lead in tea.Methods While decomposing the sample by microwave and using L_(16)(4~5) orthogonal table during GF-AAS,we optimize the operating parameters of the instruments and find the best condition for the lead capacity test in tea by checking the five elements-ashing temperature,ashing time,atomic temperature,ato...