Hanna Instruments hi 38067 User Manual

www.hannainst.com

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
occurred during shipping. If there is any noticeable dam-

age, notify your Dealer or the nearest Hanna office
immediately.
Each kit is supplied with:

• HI 38067A-0 Silica Reagent, 1 bottle with dropper

(25 mL);

• HI 38067B-0 Silica Reagent, packets (100 pcs);
• HI 38067C-0 Silica Reagent, packets (100 pcs);
• Demineralizer Bottle with filter cap for about 12 liters

of deionized water (depending on the hardness level
of water to be treated);

• 1 checker disc (containing the 38067 disc);
• 2 glass vials with caps;
• 1 plastic pipette (3 mL);
• 1 syringe (1 mL) with tip.

Note: Any damaged or defective item must be returned in

its original packing materials.

ISTR38067      04/00     PRINTED IN ITALY

Silicon does not occur free in nature, but rather as silica
(SiO

2

) 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).

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

INSTRUCTIONS

INSTRUCTIONS

INSTRUCTIONS

INSTRUCTIONS

INSTRUCTIONS

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.

Range

0 to 40 mg/L (ppm) as SiO

2

0 to 800 mg/L (ppm) as SiO

2

Smallest Increment  1 mg/L (ppm) SiO

2 

in the 0-40 range

40 mg/L (ppm) SiO

2 

in the 0-800 range

Analysis Method

Colorimetric

Sample Size

5 mL or 0.25 mL

Number of Tests

100

Case Dimensions

235x175x115 mm (9.2x6.9x4.5")

Shipping Weight

712.5 g (25.1 oz)

READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT
1- Using the plastic pipette, fill each glass

vial with 5 mL of sample (up to the mark).

2- Insert one of the vials into the left hand

opening of the checker disc. This is the
blank.

3- Remove the cap

and fill the Dem-
ineralizer Bottle
with tap water.

4- Replace the cap and

shake gently for at
least 2 minutes. The
demineralized water is

now ready.

5- Flip open the top of

the Demineralizer
Bottle cap. By gently
squeezing the bottle,
add demineralized
water to the other
vial up to the 10 mL
mark. Replace the cap and shake to mix.

6- Remove the cap and add

4 drops of HI 38067A-0

reagent. Replace the cap,
shake and wait for 7
minutes.

7- Remove the cap, add 1

packet of HI 38067B-0
reagent. Replace the cap,
shake and wait for 2 min-
utes.

8- Remove the cap and add

1 packet of HI 38067C-0
reagent. Replace the cap
and shake until the pow-
der has completely

dissolved.

9- Wait for 5 minutes to allow reaction

to complete. This is the reacted sample.

10- Remove the cap and insert

the reacted sample into the
right hand opening of the
checker disc.

11- Hold the checker disc so that

a light source illuminates the
samples from the back of the
windows.

12- Keep the checker disc at a distance of 30-40 cm (12-

16") to match the color. Rotate the disc while looking at
the color test windows and stop when you find the color

match.

13- Read the value in the result window directly in mg/L (or

ppm) of  Silica.

14- If concentration of Silica is higher than 40 ppm, perform

the test as follows.

15- Prepare the blank as before (steps 1 and 2).