Mixture of Extract   pH-value Aqueous solution of the onion extracts 3.11 Aqueous extract solution with potassium alum 1.51    Aqueous extract solution with ferric chloride           1.26 Aqueous extract solution with 1% acetic acid            2.51 Alcoholic (ethanol) in 70% alcohol 3.66     70% alcoholic extract solution with potassium alum            1.94 70% alcoholic extract solution with ferric chloride   0.01 70% alcoholic extract solution with 1% acetic acid            3.25

Table 6: Determination of pH of the varying mixture of red onion skin extract using PH meter