WARNING
TM 5-6630-215-12
2-22.
PROCEDURES.
a.
Alkalinity Test Kit (fig. 2-13).
(1) Alkalinity refers to the capability of water to neutralize
acids.
The presence of carbonates, bicarbonates, and hydroxides of
calcium, magnesium, and sodium metals are the most common causes of
alkalinity in natural waters.
(a) The levels and types of alkalinity are directly dependent
on the source of water. Natural surface and well waters usually
contain less alkalinity than sewage or wastewater samples.
High
levels of alkalinity indicate the presence of a strongly alkaline
industrial waste.
(b) Alkalinity is expressed as “P” (phenolphthalein) alkalin-
ity or as “T” (total) alkalinity.
Both types are determined by
titration with sulfuric acid standard solution 0.020 N, to an end
point evidenced by the color change of standard solution.
(c) The “P” alkalinity is determined by titration to a pH of
8.3 (the phenolphthalein end point) and registers the total hydroxide
and one half the carbonate present.
The “T” alkalinity is determined
by titration to a pH of 5.1, 4.8, or 4.5, depending on the amount of
carbon dioxide present as described in para 2-22a(3) below.
The total
alkalinity includes all carbonate, bicarbonate and hydroxide
alkalinity.
Total Alkalinity Indicator: For test purposes
only.
Not for internal use.
Keep away from
children.
Alkalinity Titration Reagent (Sulfuric Acid).
For test purposes only.
Not for internal use.
Keep away from children.
May cause burns.
Avoid
breathing vapors.
In case of contact with skin
or eyes, flush well with water, for eyes get
medical attention.
If swallowed, call a physi-
cian at one.
DO NOT INDUCE VOMITING.
Give milk
of magnesia with large amounts of water.
Follow
with milk or raw egg whites beaten in water.
Phenolphthalein
Indicator.
For test purposes
only.
Flammable.
Keep away from sparks or open
flame.
Not for internal use - contains toxic
material.
If swallowd, call a physician at once.
Induce vomiting by giving a tablespoonful of salt
in a glass of warm water, repeating until vomit is
clear.
KEEP OUT OF REACH OF CHILDREN.
2-55
