CARBON MON OX IDE IN AIR TEST KIT
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WARNING! This set contains chemicals
that may be harmful if misused. Read
cautions on individual containers
carefully. Not to be used by children
except under adult supervision
CODE 7782
QUANTITY CONTENTS CODE
4 x 60 mL *Carbon Monoxide Absorbing Solution *7799-H
4 Test Tubes, 10 mL, glass 0822
1 Carbon Monoxide in Air Comparator 7783
1 Axial Reader 2071
1 Distilled Water Ampoule 2748
*WARNING: Reagents marked with an * are considered to be potential health
hazards. To view or print a Material Safety Data Sheet (MSDS) for these
reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by
e-mail, phone or fax.
To order individual reagents or test kit components, use the specified code
number.
Read the Axial Reader Instruction Manual before proceeding.
NOTE: Store *Carbon Monoxide Absorbing Solution in a cool, dark,
place.
IN TRO DUC TION
Carbon monoxide is a poisonous inhalant, and great caution must be
exercised when working with this odorless and colorless gas. At a
concentration of approximately 1000 ppm carbon monoxide kills quickly.
A 50 ppm concentration is generally considered the upper limit of safety
in industry for healthy persons within certain age ranges when exposure
may continue for an eight hour period. Concentrations of carbon
monoxide may reach hazardous levels in garages, tunnels, behind
automobiles, or in the open atmosphere under certain conditions. All
work with the carbon monoxide testing unit should be supervised by
qualified personnel.
The carbon monoxide testing unit relies upon the use of a single reagent
for a unique, quantitative measurement of carbon monoxide
concentrations. This method requires the use of an axial reader for the
measurement of faint color reactions.
Since the re ac tion of the *Car bon Mon ox ide Ab sorb ing So lu tion (7799)
with car bon mon ox ide pro duces a yel low color, and the re agent is slightly
yel low it self, it is nec es sary to per form a re agent blank. The re agent blank
is then sub tracted from the test re sults. The con cen tra tion of the re agent
blank must be de ter mined us ing the in for ma tion for the same sampling
period as the actual test procedure. For example, if the reagent blank
matched the index of 1, and a 30 minute sampling period was chosen for
the test, it would correspond to 20 ppm (from the 30 minute sampling
time line on the chart). If the resulting color of the reaction, after a 30
minute reaction time, was determined to match an index of 5, this would
correspond to a concentration of 100 ppm. The test result would be 100
ppm minus 20 ppm, or 80 ppm carbon monoxide.
PROCEDURE
1. Pour *Carbon Monoxide Absorbing Solution (7799) into a clean
test tube (0822) to the 10 mL line.
2. Insert the test tube into the Carbon Monoxide Comparator (7783)
with the Axial Reader (2071). Match the reagent color to a color
standard.
3. Use the chart to convert the index number to concentration. Record
the reagent blank as ppm Carbon Monoxide.
4. Pour the *Carbon Monoxide Absorbing Solution from the test tube
into the impinging tube to the 10 mL line.
5. Connect the impinging apparatus to the intake of the air sampling
pump.
NOTE: Make sure the long tube is immersed in the absorbing
solution.
6. Adjust the flowmeter to collect air at a rate of 1.0 Lpm. Collect air for
30 minutes or for a sampling period that allows a measurable amount
of carbon monoxide to be absorbed.
NOTE: A measurable amount of carbon monoxide is indicated by an
increase in the yellow color of the absorbing solution.
7. At the end of the sampling period, pour the contents of the
impinging tube into a clean test tube.
8. Insert the test tube into the Carbon Monoxide in Air Comparator
(7783) with the Axial Reader (2071). Match the reaction color to a
color standard.
9. Use the chart on the back page to convert the index number to
concentration. Record the test result as ppm Carbon Monoxide.
10. Subtract the reagent blank result from the test result to determine
the carbon monoxide concentration.
CARBON MONOXIDE IN AIR CALIBRATION CHART**
TIME COMPARATOR INDEX NUMBER
(min) 1 2 3 4 5 6 7 8
10
20
30
40
60
33 67 100 133 166 200 233 267
25 50 75 100 125 150 175 200
20 40 60 80 100 120 140 160
17 34 51 68 83 100 117 134
12.5 25 37.5 60 62.5 75 87 100
**val ues in ppm
The sampling period specified in the directions corresponds to
concentrations which may be encountered in ambient air conditions.
High concentrations of pollutants in the atmosphere will require shorter
sampling periods, while low concentrations will require longer sampling
periods.
LaMOTTE COM PANY
Helping Peo ple Solve An a lyt i cal Chal lenges
PO Box 329 • Chestertown • Mary land • 21620 • USA
800-344-3100 • 410-778-3100 (Out side U.S.A.) • Fax 410-778-6394
Visit us on the web at www.lamotte.com
®
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