Hanna Instruments HI38066 Owner Manual

Range
0 to 1.0 mg/L (ppm) as SiO2
Smallest Increment
0.02 mg/L (ppm) SiO2
Analysis Method
Colorimetric
Sample Size
20 mL
Number of Tests
100
Case Dimensions 235 x 175 x 115 mm (9.2 x 6.9 x 4.5")
Shipping Weight
580 g (20.4 oz)
HI 38066
Silica Low Range
Test Kit
Significance and use
Silicon is not free in nature, but rather as silica (SiO2) in
crystalline forms, combined with other oxides and metals in
a variety of silicates. Silicon is usually reported as silica
when rocks, sediments, soil and water are analyzed. Silica
is only slightly soluble in water; solubility and form of silica
in water depend on pH of water and on the minerals,
containing silica, in contact with water. The silica content of
natural water is in the 5 to 25 ppm range. It is important
to estimate silica concentration in case of some industrial
installation such as steam generation and cooling water
systems.
Note: mg/L is equivalent to ppm (parts per million).
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Note: Any damaged or defective item must be returned in
its original packing materials.
Chemical reaction
Determination of silica concentration is an adaptation of the
ASTM D859 method of the heteropoly blue method. The
reaction between silica and reagents causes a blue tint in
the sample which is proportional to the silica concentration.
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Instructions
ISTR38066
Dear Customer,
Thank you for choosing a Hanna Instruments 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 [email protected].
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:
• HI 93705A-0 Silica Reagent A, 2 bottles with
dropper (2 x 20 mL);
• HI 93705B-0 Silica Reagent B, packets (100 pcs.);
• HI 93705C-0 Silica Reagent C, packets (100 pcs.);
• 1 checker disc (containing a mirror, a mirror holder
and the 38066 disc);
• 2 glass vials with caps;
• 1 plastic pipette (3 mL).
• Remove the cap and insert
the reacted sample into the
right hand opening of the
checker disc.
• Hold the checker disc so that
a light source illuminates the
samples from the top.
Specifications
Instruction Manual
READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT
• Verify that the mirror, its holder and the disc are
pre-installed in the checker disc. If not, install them
as shown in the figure.
• Using the plastic pipette, fill each glass
vial with 20 mL of sample (up to the
mark).
• Insert one of the vials into the left hand opening of the
checker disc. This is the blank.
• Add to the other
vial 6 drops of
HI 93705A-0
reagent A. Replace
the cap, shake and
wait for 5 minutes.
• Remove the cap,
add 1 packet of
HI 93705B-0
reagent B. Replace
the cap, shake and
wait for 2 minutes.
• Remove the cap
and add 1 packet
of HI 93705C-0 reagent
C. Replace the cap
and shake until the
powder has completely
dissolved.
• Keep the checker disc at a distance of 30-40 cm (1216") to match the color. Rotate the disc while looking at
the color test windows and stop when you find the color
match. Read the value in the result window directly in
mg/L (or ppm) of Silica.
For best results: Perform the reading three times and
take the average value (divide by 3 the sum of the
three numbers). Intensely colored samples will make
the color matching difficult and they should be
adequately treated before performing the test.
Suspended matter in large amounts should be
removed by prior filtration.
Caution: Ultraviolet radiation may cause fading of colors.
When not in use, keep the disc protected from light,
in a cool and dry place.
Interferences: Phosphate above 50 ppm, sulfide, high
dissolved salts concentration, high concentration of
iron.
Accessories
HI 38066-100
Spare Reagents Set (100 tests)
References
Adaptation of the ASTM D859 method of the Heteropoly
Blue Method.
Health and safety
• Wait for 5 minutes to allow reaction to
complete. This is the reacted sample.
The chemicals contained in this kit may be hazardous if
improperly handled. Read the relevant Health and Safety
Data Sheet before performing this test.