Differently Processed Sample number Hg (mg/kg) Pb (mg/kg) As (mg/kg)
Rinsed and dried 5 0.00024 ± 0.00022 0.071 ± 0.062 0.058 ± 0071
Steamed then dried 4 0.00025 ± 0.00019 0.081 ± 0.072 0.053 ± 0.067
Boiled, drained and dried 6 0.00021 ± 0.00021 0.069 ± 0.060 0.036 ± 0.014
These are 3-time mean values of the measured experimental results
Values with different subscripts are significantly difference at p<0.05
Table 3: the Heavy metal contents in the different processed collard green grown in China.