1. Determination of Pb (Lead), Cd (Cadmium), Cr (Chromium), Cu (Copper), and Ni (Nickel) in Chinese tea with high-resolution continuum source graphite furnace atomic absorption spectrometry 
Wen-Si Zhong, Ting Ren, Li-Jiao Zhao 
Journal of Food and Drug Analysis 
Volume 24, Issue 1, Pages (January 2016)
DOI: /j.jfda
Copyright © Terms and Conditions

2. Fig. 1
Pyrolysis and atomization temperature curves for lead, cadmium, chromium, copper, and nickel. 1, no matrix modifier; 2, 3, and 4: with 2 μL, 5 μL, and 10 μL of modifier, respectively. (10 g/L NH4H2PO4 solution for Pb and Cd; 1 g/L Mg(NO3)2 solution for Cr; 0.5 g/L Mg(NO3)2 solution for Cu and Ni). Cd = cadmium; Cr = chromium; Cu = copper; Ni = nickel; Pb = lead.
Journal of Food and Drug Analysis  , 46-55DOI: ( /j.jfda )
Copyright © Terms and Conditions

3. Fig. 2
The nonlinear standard curves for lead, cadmium, chromium, copper, and nickel. Cd = cadmium; Cr = chromium; Cu = copper; Ni = nickel; Pb = lead.
Journal of Food and Drug Analysis  , 46-55DOI: ( /j.jfda )
Copyright © Terms and Conditions

4. Fig. 3
Lead, cadmium, chromium, copper, and nickel contents in tea samples determined with high-resolution continuum source-graphite furnace atomic absorption spectrometry. Cd = cadmium; Cr = chromium; Cu = copper; Ni = nickel; Pb = lead.
Journal of Food and Drug Analysis  , 46-55DOI: ( /j.jfda )
Copyright © Terms and Conditions

5. Fig. 4
Distribution of the lead, cadmium, chromium, copper, and nickel contents in the seven types of tea. Cd = cadmium; Cr = chromium; Cu = copper; Ni = nickel; Pb = lead.
Journal of Food and Drug Analysis  , 46-55DOI: ( /j.jfda )
Copyright © Terms and Conditions