US EPA

8181996 

Journal Article 

Determination of lead, manganese, copper, zinc, cadmium, nickel and chromium in tea leaves 

Srividhya, B; Subramanian, R; Raj, V 

2011 

1 

International Journal of Pharmacy and Pharmaceutical Sciences
ISSN: 2656-0097
EISSN: 0975-1491 

3 

4 

257-258 

English 

Tea is one of the common drinks in India. The essential and non essential elements preset in black and green teas vary with respect to soil and geographical origin. Hence the aim of the study is to measure some heavy metals (Cu, Ni, Pb, Cd, Cr, Zn and Mn) in black and green tea which are commonly consumed in South India. Heavy metal contents were determined by Atomic Absorption Spectrometry (AAS). The results of analysis showed that the mean level of Cu was 14.34 ± 0.49 mg/kg, Ni 11.34 ± 0.63 mg/kg, Pb 2.31 ± 0.13 mg/kg, Cd 0.89 ±0.10 mg/kg, Zn 25.39 ± 0.59 mg/kg, Mn 709.0 ± 14.18 mg/kg and Cr 704.0 ± 14.18 mg/kg for black tea and Cu 11.28 ± 0.08 mg/kg, Ni 9.09 ± 0.75 mg/kg, Cd 1.59 ± 0.26 mg/kg, Zn 26.39 ± 0.92 mg/kg and Mn 508.0 ± 44.03 mg/kg. Pb and Cr content in green tea was lower the quantification limit. 

AAS; Black tea; Green tea; Heavy metals