• Pipette 5 ml of sample solution for taking on the average small 100 ml, triangle added 4 5 drops of indicator substances PP. and then titrated with dd A5 (0.1 N H2SO4) until the model switched from pink to colorless. Number ml dd A5 used is the number of points of alkalinity (f. Al). Often F.Al = 35 40 points.• In the manufacturing process, alkalinity F.Al freedom will lose. To increase F.Al up 1 point to use about 1.5 kg LPCLEANER P28T for 1000L.
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