SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
Instruction Manual
www.hannainst.com
Dear Customer,
Thank you for choosing a Hanna Product. Please read the
instructions carefully before using the chemical test kit. It
will provide you with the necessary information for correct
use of the kit.
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
HI 3818
Carbon Dioxide
Test Kit
ISTR3818R3 07/01 PRINTED IN ITALY
Remove the chemical test kit from the packing material and examine
it carefully to make sure that no damage has occurred during shipping.
If there is any noticeable damage, notify your Dealer or the nearest
Hanna office immediately.
Each kit is supplied with:
• Phenolpthtalein Indicator, 1 bottle (10 mL) with dropper ;
• HI 3818-0, 1 bottle (120 mL);
• 2 calibrated vessels (10 and 50 mL);
• 1 calibrated syringe.
Note: Any damaged or defective item must be returned in its original
packing materials.
Certain carbon dioxide levels are required in nature and in
man's environment. Generally, lakes and rivers contain less
than 10 mg/L * carbon dioxide, however stagnant or pol-
luted water can generate large amounts due to organic or
mineral decomposition. These results can make the water
corrosive and toxic to aquatic life-forms like fish. The moni-
toring of carbon dioxide levels is also critical in the man-made
environment. A certain amount of carbon dioxide is reintro-
duced into potable water during the final stages of the
water-softening process. In water systems, a delicate bal-
ance of carbon dioxide must be maintained to prevent
either corrosion or encrustation of pipes and storage tanks.
Carbon dioxide levels can be measured quickly and safely
with the Hanna Carbon Dioxide Test Kit. This compact,
portable kit allows the user the option of field or laboratory
use. The design makes the kit easy to handle and, except
for HI 3818-0, practically prevents accidental injury or
damage due to spills.
Note: mg/L is equivalent to ppm (parts per million).
SIGNIFICANCE AND USESIGNIFICANCE AND USE
SIGNIFICANCE AND USESIGNIFICANCE AND USE
SIGNIFICANCE AND USE
CHEMICAL REACTIONCHEMICAL REACTION
CHEMICAL REACTIONCHEMICAL REACTION
CHEMICAL REACTION
Carbon dioxide (as carbonic acid) in the water sample is
neutralized with a dilute sodium-hydroxide solution to a pH
of 8.3 using a phenolphthalein indicator. This process con-
verts carbonic acid to sodium bicarbonate:
CO2+H2O→H2CO3+NaOH →NaHCO3+H20
REFERENCESREFERENCES
REFERENCESREFERENCES
REFERENCES
1987 Annual Book of ASTM Standard, Volume 11.01 Water
(1), pages 413-421.
Standard Methods for the Examination of Water and Waste-
water, 18th Edition, 1992, pages 4-12.
INSTRUCTIONSINSTRUCTIONS
INSTRUCTIONSINSTRUCTIONS
INSTRUCTIONS
READ ALL THE INSTRUCTIONS BEFORE USING THE TEST KIT
LOOK AT THE BACK PAGE FOR THE ILLUSTRATED PROCEDURE
Determination in the 0 to 100 mg/L Carbon Dioxide
• Remove the cap from the small plastic vessel. Rinse the
plastic vessel with water sample, fill to
the 5 mL mark and replace the cap.
• Add 1 drop of Phenolphtalein indica-
tor through the cap port, and mix
carefully swirling the vessel in tight circles. If the solution
is pink or red, then record as 0 mg/L CO2. If the
solution remains colorless, then proceed to next step.
• Take the titration syringe and push plunger
completely into the syringe. Insert tip into HI
3818-0 solution and pull plunger out until
the lower edge of the plunger seal is on the
0 mL mark of the syringe.
Note: Push and twist pipet tip onto tapered
end of syringe ensuring an airtight fit.
• Place syringe tip into the cap port of the
plastic vessel and slowly add the titration
solution drop-wise, swirling to mix after
each drop. Continue adding titration solu-
tion until the solution in the plastic vessel
turns pink.
• Read off the milliliters of titration solution from the
syringe scale, and multiply by 100 to obtain mg/L
(ppm) CO2.
Determination in the 0 to 50 mg/L Carbon Dioxide
If results are lower than 50 mg/L, the precision of the test
can be improved as follows.
• Remove the cap from the small
plastic vessel. Rinse the plastic ves-
sel with water sample, fill to the
10 mL mark and replace the cap.
x 100 = CO2
x 10 = CO2
• Proceed with the test as described before. To obtain the
result multiply the values on the syringe scale by 50.
Determination in the 0 to 10 mg/L Carbon Dioxide
If results are lower than 10 mg/L, the precision of the test
can be improved as follows.
• Remove the cap from the large plas-
tic vessel. Rinse the plastic vessel
with water sample, fill to the 50 mL
mark and replace the cap.
• Proceed with the test as described before. To obtain the
result multiply the values on the syringe scale by 10.
x 50 = CO2
ACCESSORIESACCESSORIES
ACCESSORIESACCESSORIES
ACCESSORIES
HI 3818-100 Spare reagents (100 tests)
HEALTH AND SAFETYHEALTH AND SAFETY
HEALTH AND SAFETYHEALTH AND SAFETY
HEALTH AND SAFETY
The chemicals contained in this test kit may be hazardous if
improperly handled. Read Health and Safety Data Sheets
before performing the test.
Range 0 to 10 mg/L (ppm) CO2
0 to 50 mg/L (ppm) CO2
0 to 100 mg/L (ppm) CO2
Smallest Increment 0.1 mg/L [in the 0-10 mg/L range]
0.5 mg/L [in the 0-50 mg/L range]
1 mg/L [in the 0-100 mg/L range]
Analysis Method Base titration using
phenolphthalein indicator
Sample Size 5 mL, 10 mL and 50 mL
Number of Tests 110 (average)
Case Dimensions 200x120x60 mm (7.9x4.7x2.4")
Shipping Weight 460 g (1 lb.)
