pH value of :
1) saliva (before meal)
2)saliva (after meal)
3)lemon juice
4)colourless aerated drink
5)carrot juice
6)coffe
7)tomato juice
8)tap water
pH value of :
1) saliva (before meal)
2)saliva (after meal)
3)lemon juice
4)colourless aerated drink
5)carrot juice
6)coffe
7)tomato juice
8)tap water