Hanna Instruments HI 3855 User manual

Instruction Manual
www.hannainst.com
DearCustomer,
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);
• 1checkerdisc;
• 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
Cyaniderefers 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
andotherchemicalprocesses.Thereare mainly twochemical
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.)
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
SIGNIFICANCE AND USESIGNIFICANCE AND USE
SIGNIFICANCE AND USESIGNIFICANCE AND USE
SIGNIFICANCE AND USE
CHEMICAL REACTIONCHEMICAL REACTION
CHEMICAL REACTIONCHEMICAL REACTION
CHEMICAL REACTION
READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT
Note: Temperature is a very important
parameter for this test method. For
bestresults the sampleshould have
a temperature not exceeding 20°C.
• Usingthe plastic pipette,filleach 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.
INSTRUCTIONSINSTRUCTIONS
INSTRUCTIONSINSTRUCTIONS
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 SAFETYHEALTH AND SAFETY
HEALTH AND SAFETYHEALTH AND SAFETY
HEALTH AND SAFETY
REFERENCESREFERENCES
REFERENCESREFERENCES
REFERENCES
Standard Methods for the Examination of Water and Waste-
water, 18th edition, 1992
Cyanides react with the pyridine-pyrazolone reagent to form
a blue complex in neutral buffered solution. The absorbance
ofthiscoloredproductisproportionaltotheconcentrationof
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
spoonis filled:
- do not overfill it;
- do not press the powder.
• Replace the cap immedi-
ately,to prevent theescape
ofchlorine gas whichisde-
velopedduring thereaction,
and shake gently for 30
seconds.
• Waitfor30seconds
and add the con-
tent of one packet
ofHI3855B-0re-
agent.Replacethe
capandshake gen-
tly for 10 seconds.
• Immediately add
the content of one packet of HI
3855C-0 reagent,
replace the cap and
shakevigorously un-
til the powder has
completelydissolved.
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
thereactedsample into the
right hand opening of the
checkerdisc.
• Hold the checker disc so
that a light source illumi-
natesthe samples from the
backwindows.
• 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-.
Forbest results: Intensely colored sampleswillmake 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.