Hanna Instruments hi 3855 Benutzerhandbuch

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.
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 3855A-0 Cyanide Reagent, 1 bottle (17 g);
• HI 3855B-0 reagent, packets (100 pcs);
• HI 3855C-0 reagent, packets (100 pcs);
• 1 checker disc;
• 2 glass vials with caps;
• 1 plastic pipette (3 mL);
• 1 spoon.

Note: Any damaged or defective item must be returned in

its original packing materials.

HI 3855

Cyanide

Test Kit

ISTR3855 10/99 PRINTED IN ITALY

Cyanide refers to all of the CN groups in cyanide-compounds

that can be determined as the cyanide ion CN

. In most

natural waters the molecular HCN form predominates. In

solutions of metal cyanides, the CN group may also be

present as a complex of varying stability.
Cyanides are extensively used for extraction of silver/gold

ores, metal-cleaning and electroplating baths, coke ovens

and other chemical processes. There are mainly two chemical

treatments to remove cyanides from waste-waters: one is

chlorination and the other is the alkaline method.

CAUTION: cyanides and their solutions liberate very

toxic gases when in contact with acids!
Note: mg/L is equivalent to ppm (parts per million).

Range

0 to 0.30 mg/L (ppm) as Cyanide

Smallest Increment 0.01 mg/L in the 0.00-0.15 range

0.05 mg/L in the 0.15-0.30 range

Analysis Method

Colorimetric

Sample Size

10 mL

Number of Tests

100

Case Dimensions

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

Shipping Weight

580 g (20.4 oz.)

SPECIFICATIONS

SIGNIFICANCE AND USE

CHEMICAL REACTION

READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT
Note: Temperature is a very important

parameter for this test method. For
best results the sample should have

a temperature not exceeding 20°C.

• Using the plastic pipette, fill each glass

vial with 10 mL of sample, up to the
mark.

• Insert one of them into the left hand

opening of the checker disc. This is the blank.

INSTRUCTIONS

The chemicals contained in this kit may be hazardous if
improperly handled. Read Health and Safety Data Sheet
before performing this test.

HEALTH AND SAFETY

REFERENCES

Standard Methods for the Examination of Water and Waste-
water, 18

edition, 1992

Cyanides react with the pyridine-pyrazolone reagent to form

a blue complex in neutral buffered solution. The absorbance

of this colored product is proportional to the concentration of

cyanide present in the aqueous sample.

• Add to the other glass vial 1

level spoon of HI 3855A-0 Cya-
nide Reagent. Remember to close
the reagent bottle immediately
after use.

Note: Pay attention to the way the

spoon is filled:
- do not overfill it;
- do not press the powder.

• Replace the cap immedi-

ately, to prevent the escape

of chlorine gas which is de-
veloped during the reaction,
and shake gently for 30
seconds.

• Wait for 30 seconds

and add the con-
tent of one packet
of HI 3855B-0 re-

agent. Replace the
cap and shake gen-
tly for 10 seconds.

• Immediately add

the content of one packet of HI
3855C-0 reagent,
replace the cap and
shake vigorously un-

til the powder has
completely dissolved.
Keep the vial
capped.

• Wait for 25 minutes to allow color to

develop. This is the reacted sample.

Note: Shake the vial 4 or 5 times vigorously during the first

20 minutes of the reaction time. The result is not
affected by undissolved reagent powder.

• 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 illumi-
nates the samples from the
back windows.

• 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 and record it in mg/L (or
ppm) of Cyanide as CN

For best results: Intensely colored samples will make the color

matching determination difficult and they should be

adequately treated before performing the test. Sus-

pended matter in large amounts should be removed

by prior filtration.
Oxidizing (like chlorine) or reducing agents (such as

sulfide or sulfur dioxide) are known to interfere with the

test. Distillation will remove these.
Samples with high pH values should be adjusted to

approximately pH 7 before testing.

Caution: Ultraviolet radiation may cause fading of colors.

When not in use, keep the disc protected from light, in

a cool and dry place.