MEASURING METHOD

Acid Consumption (Ph8.3) (P-ALKALINITY) TEST

1.       Take 50 mil of filtered water by mess cylinder (1) into conical flask (2)

2.        Add 2 Drops of the acid consumption primary indicator (3) in case of boiler water, the water color changes to pink.

3.       Push up the acid consumption test solution (5) in the burette (4) to “0”mark by pressing the bottle.

4.       Hold conical flask containing pink colored test water in right hand and drop the acid consumption test solution gradually, opening the cock on auto burette slowly by left hand.

5.       The pink color gradually fades away and when the test water become colorless, stop dropping test solution.

6.       Count the scale on the auto burette from “0” point in ppm and the number is Acid Consumption (Ph8.3) as CaCO3

Acid Consumption (pH4.8) (M-ALAKINITY) TEST

1.       The test water used for acid consumption (Ph8.3) test is used intact

2.       Add one drop of the acid consumption secondary indicator (6), and the liquid in conical flask changes to yellow.

3.       Drop continuously the test solution in the auto burette used for acid consumption (pH8.3) test from this position again.

4.       As the drops are added  in conical flask, the yellowed water changes to orange-red, shaking the flask well and stop dropping when the color of whole water becomes orange-red clearly.

5.       Count the scale on the auto burette from “0” point in ppm and the number is acid consumption (Ph4.8) as CaCO3

SALINITY (CHLORIDE ION CI¯) test

1.       Test water used for acid Consumption (pH4.8) test is used intact.

2.       Add 2 drops of the salinity indicator (7) to orange-red colored water in conical flask and the color changes to yellow.

3.       Push up the salinity test solution (9) in auto burette (8) to “0”point by pressing the bottle and the drop the liquid from this position gradually.

4.       Stop dropping when the color of water in conical flask changes from yellow to faint brown

5.       Count the scale on auto burette from “0” point  and the number is the chloride ion CI-in ppm.

PHOSPATE ION (P0₄³¯) test

1.       Take 25 mil of filtered test water into beaker (10)

2.       Add one drop of the acid consumption primary indicator (3) and shake well until the pink colored.

3.       Add the phosphate primary reagent solution(11) by one drop after another and shake well until the pink color fade away.

4.       Put the decolored water to the “5”point on phosphate test tube (12).

5.       Add the phosphate secondary reagent solution (13)to the “7.5”point on the test tube, plug  tight and shake well.

6.       If phosphate ion remains, color changes to yellow.

7.       Compare the depth of color with the standard color ampoule (14) and seek the corresponding color in the comparator (15) this is ppm of phosphate ion P0₄³¯.

HARDNESS   teat

If the hardness of boiler water containing over 20 ppm of P0₄³¯, Then the hardness is ZERRO and the test is unnecessary. The hardness of raw, feed and boiler water without P0₄³¯ is tested by following method.

1.       Put  50 ml of test water into conical flask by using mess-cylinder (1).

2.       Add 3 drops of the hardness primary solution (16) with a dropping pipette .

3.       Add 1 mil of the hardness secondary solution (17) with a dropping pipette.

4.       Add 3 drops of the hardness third solution (18) with dropping rod and then the test water in conical flask is blue or red colored. if it is blue, the hardness is zero, and if it is red, the hardness stay to be  measured.

5.       Dropping test is started only after the hardness test solution (20) is adjusted to “0” point of the auto burette (19).

6.       Red-colored  water changes to blue as the dropping is proceed and shake well, and when total water is clear blue color, stop dropping.

7.       Number of ppm “0”point on the auto burette indicate the hardness as CaCO_3.

pH test

Dip  the pH  test paper (21) in boiler water and the Ph  is easily measured by comparision of degree of discoloration with standard colors.