| 
      
        | Heavy    metal(ppm) | Control    biscuits | Biscuits    -10% KF | Biscuits    -15% KF |  
        | Al | 10.05 ± 2.05 | 31.90 ± 7.92 | 31.90 ± 7.92 |  
        | Be | 0.00 ± 0.00 | 9.05 ± 0.78 | 9.25 ± 0.78 |  
        | Cu | 6.25 ± 0.50 | 5.30 ± 0.00 | 6.55 ± 0.21 |  
        | Fe | 26.45 ± 2.76 | 47.95 ± 1.91 | 231.65 ± 17.04 |  
        | Ni | 0.90 ± 0.57 | 0.85 ± 0.21 | 0.95 ± 0.21 |  
        | Zn | 10.95 ± 3.46 | 231.65 ± 17.04 | 229.70 ± 1.13 |  | 
  
    | Means ± standard deviation in each raw with the different lowercase superscript letters are significantly different (p<0.05). KF:Kohila Flour. Determination was done in duplicate. | 
  
    | Table 4: The Heavy Metal Content in Biscuit Samples. |