Hanna Instruments hi 38033 User Manual
www.hannainst.com
HI 38033
Total Hardness
0-30 gpg range
Test Kit
HEALTH AND SAFETY
HEALTH AND SAFETY
HEALTH AND SAFETY
HEALTH AND SAFETY
HEALTH AND SAFETY
The chemicals contained in this test kit may be hazardous if
improperly handled. Read the relevant Health and Safety
Data Sheets before performing the test.
improperly handled. Read the relevant Health and Safety
Data Sheets before performing the test.
Instruction Manual
ISTR38033 03/00 PRINTED IN ITALY
Water hardness has traditionally been defined as the
capacity of water to precipitate soap. The ionic species in
water causing the precipitation were later found to be
primarily calcium and magnesium. At the present time,
water hardness is a quantitative measure of these ions in
the water sample. Now it is also known that certain other
ion species, such as iron, zinc and manganese, contribute to
capacity of water to precipitate soap. The ionic species in
water causing the precipitation were later found to be
primarily calcium and magnesium. At the present time,
water hardness is a quantitative measure of these ions in
the water sample. Now it is also known that certain other
ion species, such as iron, zinc and manganese, contribute to
the overall hardness of water. The measure and subsequent
control of water hardness is essential to prevent scaling and
clogging in water pipes. The Hanna hardness test kit makes
monitoring easy and quick. The compact size provides the
versatility to use the kit anywhere and the design makes
the kit easy to handle.
Note: 1 gpg (grains per gallon) CaCO
control of water hardness is essential to prevent scaling and
clogging in water pipes. The Hanna hardness test kit makes
monitoring easy and quick. The compact size provides the
versatility to use the kit anywhere and the design makes
the kit easy to handle.
Note: 1 gpg (grains per gallon) CaCO
3
is equivalent to 17
ppm CaCO
3
(where
ppm - parts per million - is
equivalent to mg/L).
Range
0 to 30 gpg CaCO
3
Smallest Increment
1 gpg CaCO
3
Analysis Method
EDTA titration
Sample Size
10 mL
Number of Tests
100
Case Dimensions
235x175x115 mm (9.2x6.9x4.5")
Shipping Weight
457 g (16.1 oz)
SPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONS
SIGNIFICANCE AND USE
SIGNIFICANCE AND USE
SIGNIFICANCE AND USE
SIGNIFICANCE AND USE
SIGNIFICANCE AND USE
CHEMICAL REACTION
CHEMICAL REACTION
CHEMICAL REACTION
CHEMICAL REACTION
CHEMICAL REACTION
The hardness level as gpg calcium carbonate (CaCO
3
) is
determined by an EDTA (ethylene-diamine-tetraacetic acid)
titration. The solution is first adjusted to a pH of 10 using a
buffer solution. The indicator chelates with metal ions such as
magnesium or calcium to form a red colored complex. As EDTA
titration. The solution is first adjusted to a pH of 10 using a
buffer solution. The indicator chelates with metal ions such as
magnesium or calcium to form a red colored complex. As EDTA
is added, metal ions complex with it. After all the free metal
ions have been complexed, an excess EDTA removes the metal
ions complexed with the indicator to form a blue colored
solution. This color change from red to blue is the endpoint of
the titration.
ions have been complexed, an excess EDTA removes the metal
ions complexed with the indicator to form a blue colored
solution. This color change from red to blue is the endpoint of
the titration.
READ ALL THE INSTRUCTIONS BEFORE USING THE TEST KIT
• Remove the cap from the plastic ves-
• Remove the cap from the plastic ves-
sel. Rinse the plastic vessel with the
water sample, fill to the 10 mL mark
water sample, fill to the 10 mL mark
and replace the cap.
• Add 5 drops of Buffer Solution through the cap port
and mix carefully by swirling the vessel in tight circles.
• Add 1 drop of Calmagite Indicator through the cap port
and mix as described above. The solution becomes a red-
violet color.
violet color.
• Fill the plastic pipette with HI 38033-0 EDTA Solution
and insert the tip into the cap port of the plastic vessel.
Add the solution drop by drop, swirling to mix after
each drop, while keeping an accurate count of the
number of drops being added to the solution in the
Add the solution drop by drop, swirling to mix after
each drop, while keeping an accurate count of the
number of drops being added to the solution in the
vessel.
• Continue adding titration solution until the solution in
the plastic vessel becomes purple. Then mix for 15
INSTRUCTIONS
INSTRUCTIONS
INSTRUCTIONS
INSTRUCTIONS
INSTRUCTIONS
REFERENCES
REFERENCES
REFERENCES
REFERENCES
REFERENCES
Standard Methods for the Examination of Water and
Wastewater
Wastewater
, 16
th
Edition, 1985, p. 210-214.
1987 Annual Book of ASTM Standard
, vol. 11.01 Water
(1), p. 212-215.
Dear Customer,
Thank you for choosing a Hanna Product.
Please read the instruction sheet carefully before using the
test kit. It will provide you with the necessary information
for correct use of the kit. If you need additional information,
do not hesitate to e-mail us at tech@hannainst.com.
Remove the chemical test kit from the packing material and
examine it carefully to make sure that no damage has
Thank you for choosing a Hanna Product.
Please read the instruction sheet carefully before using the
test kit. It will provide you with the necessary information
for correct use of the kit. If you need additional information,
do not hesitate to e-mail us at tech@hannainst.com.
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 dam-
age, notify your Dealer or the nearest Hanna office
immediately.
Each kit is supplied with:
age, notify your Dealer or the nearest Hanna office
immediately.
Each kit is supplied with:
• Buffer Solution pH 10.2±0.2, 1 bottle with dropper
(30 mL);
• Calmagite Indicator, 1 bottle with dropper (10 mL);
• HI 38033-0 EDTA Solution, 2 bottles (2x75 mL);
• 1 calibrated plastic vessel (20 mL) with cap;
• 1 plastic pipette (1 mL).
• HI 38033-0 EDTA Solution, 2 bottles (2x75 mL);
• 1 calibrated plastic vessel (20 mL) with cap;
• 1 plastic pipette (1 mL).
Note: Any damaged or defective item must be returned in
its original packing materials.
10 mL
seconds after each additional drop until the solution
turns blue.
• Record the number of drops needed to obtain the final
color change as gpg CaCO
3
of total hardness of your
sample.
drops of titrant x 1 = gpg CaCO
3
x 5
x 1