TEST METHOD FOR ALKALINITY IN INDUSTRIAL WATER
BACKGROUND OF THE TEST:
Alkalinity is a measure of ability of water to neutralize
any acid. Alkalinity in water is observed primarily due
to bicarbonate, carbonate and hydroxide ions in water.
Alkalinity test represents water potential towards
scaling and corrosion sides. Water treatment engineers
use alkalinity test results to interpret different indices
like LSI, RI, and PSI as well for boiler water chemistry
interpretation.
Nuclotrasis offers user friendly test method with ease of
handling the relevant reagents and other equipments
used in the analysis. For determination of alkalinity in
industrial water, this test relies on volumetric titration
between sample alkalinity builder analytes in sample as
titrand and standard acid as titrant while the required
reagents are used through easy handling glassware.
REAGENTS/EQUIPMENTS/APPARATUS:
Glass wares such as conical flask, measuring
cylinder to measure and take sample
NUCLOTRASIS p-Alkalinity Test Indicator
(Item code: 01-06-01)
NUCLOTRASIS M-Alkalinity Test Indicator
(Item code: 01-06-02)
NUCLOTRASIS Alkalinity Test Titrant Solution
(Item code: 01-06-03)
SAMPLE COLLECTION & PREPARATION
Make sure to immediately analyze the sample
after collection of sample.
Ensure to collect sample in a suitable and
designated bottle for a specific sample.
Ensure to conduct this test at room temperatures.
TEST PROCEDURE:
1. We recommend selecting the sample volume
based on your expected/desired range from the
chart below.
p-ALKALINITY DETERMINATION
2. Add 2-3 drops of NUCLOTRASIS p-Alkalinity
Test Indicator (Item Code: 01-06-1) and
gently mix. Pink color will appear if palkalinity is present in the sample.
3. If p-alkalinity is present, titrate the sample
drop wise while counting number of drops of
NUCLOTRASIS Alkalinity Test Titrant Solution
(Item Code: 01-06-3) with gentle mixing until
colorless solution is obtained.
4. Note the number of drops added and multiply
with multiplication factor mentioned in above
chart against selected sample volume.
5. Report p-alkalinity result as ppm of CaCO3.
M-ALKALINITY DETERMINATION
1. Add 2-3 drops of NUCLOTRASIS M-Alkalinity
Test Indicator (Item Code: 01-06-2) and
gently mix. Green color will appear.
2. Now titrate the sample drop wise while
counting number of drops of NUCLOTRASIS
Alkalinity Test Titrant Solution (Item Code:
01-06-3) with gentle mixing until pinkish
orange solution is obtained.
3. Note the number of drops added and multiply
with multiplication factor mentioned in above
chart against selected sample volume.
4. Report M-alkalinity result as ppm of CaCO3.
OH-ALKALINITY DETERMINATION
1. To obtain OH-Alkalinity, use following
formula:
OH-Alkalinity = 2P-M
Where,
P = p-alkalinity obtained
M = M-Alkalinity obtained
2. Report OH-alkalinity result as ppm of CaCO3.
REFERENCES:
1. ASTM Manual of Industrial Water,
Range D1067-02 (2014).
(mg/L as CaCO3
)
Sample volume
(mL)
Multiplication Factor
0-50 or 0-100 ppm 10 10
60-100 and above 5 20
Above 200 2 50
Above 500 1 100
PRODUCT INFORMATION FLYER