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STEC
No.93
Instructions
for
Acrolein Detector Tube
FOR SAFE OPERATION :
Carefully read this manual and the instruction manual of your Gastec Gas Sampling Pump.
&WARNING:
1. Use only Gastec detector tubes in a Gastec Pump.
2. Do not interchange or use non-Gastec parts or components in Gastec's detector tube and pump system.
3. The use of non-Gastec parts or components in Gastec's detector tube and pump system, or use of a non-Gastec detector tube with a Gastec pump, or use of a Gastec detector tube with a non-Gastec pump may result in property damage, serious bodily injury, and death; voids all warranties; and voids all performance and data accuracy guarantees.
&.
CAUTION : If you do not observe the following precautions, you may suffer injuries or damage the product.
1. When breaking the tube ends, keep away from eyes.
2. Do not touch the broken glass tubes, pieces or reagent with bare hand(s).
3. The sampling time represents the time necessary to draw the air sample through the tube.
The tube must be positioned in the desired sampling area for the entire sampling time or until the flow finish indicator indicates the end of the sample.
.6..NOTES : For maintaining performance and reliability of the test results, observe the following.
1. Use Gastec Gas Sampling Pump together with Gastec Detector Tubes only for the purposes specified in the instruction manual of the detector tube.
2. Use this tube within the temperature range of O 40°C (32 104°F).
3. Use this tube within the relative humidity range of O - 90%.
4. This tube may be interfered with by the coexisting gases. Please refer to the table
"INTERFERENCES" below.
5. Shelf life and storage condition of the tube are marked on the label of the box of tube.
APPLICATION OF THE TUBE :
Use this tube for detecting Acrolein in the air or in industrial areas and for determining the environmental atmospheric condition.
SPECIFICATION :
(Because of Gastec's commitment to continued improvement, specifications are subject to change without notice.)
Detecting Layer
Measurina Ranae
Number of Pump Strokes
Correction Factor
Samplinq Time
Detectinq Limit
Colour Chanae
Reaction Principle
3.3 10 ppm
4
1/3
10 800 ppm
2 minutes per pump stroke
2 ppm (n=4)
2
1
3CH2 : CHCHO
Yellow Red
+
(NH2OH)3H3PO4 H3PO4
H3PO4 + Base Phosphate
Coefficient of Variation : 10% (for 10 to 200 ppm), 5% (for 200 to 800 ppm)
**Shelf Life : Please refer to the validity date printed on the box of tubes.
**Store the tubes at 10°C (50°F) or below in a refrigerator.
CORRECTION FOR TEMPERATURE, HUMIDITY AND PRESSURE :
Temperature : Correct for temperature by the table below.
Tube
Reading
(ppm)
800
600
400
200
100
50
20
10
True Concentration (ppm)
0°C 5°C 10°C 15°C 20°C 25°C
(32°F) (41°F) (50°F) (59°F) (68°F) (77°F)
2000 1300 800
4600 2700 1550 950 600
3600 1900 1000 600 400
1900 1100 600 320 200
550 330
250 130
60
25
50
20
200
80
40
16
130
60
30
13
100
50
20
10
500
400
270
160
88
43
17.5
8
300
250
200
130
75
35
15
7
30°C 35°C
(86°F) (95°F)
250
200
160
110
63
30
12.5
6
40°C
(104°F)
50
25
10
5
200
170
140
90
Humidity : No correction is required.
Pressure : To correct for pressure, multiply the tube reading by
Tube Reading* (ppm) x 1013 (hPa)
Atmospheric Pressure (hPa)
*
This value is after other correction(s), if applied any.
MEASUREMENT PROCEDURE:
1. For checking the leakage of the pump, insert a fresh sealed detector tube into the pump.
Follow instructions provided with the pump operating manual.
2. Break tips off a fresh detector tube with the tube tip breaker of the pump.
3. Insert the tube into the pump inlet with arrow ( G► ) on the tube pointing toward pump.
4. Make certain the pump handle is all the way in. Align the guide mark on the pump body with the guide mark on the handle.
5. Pull the handle all the way out until it locks at one pump stroke (100 ml). Wait two minutes and confirm the completion of the sampling. Repeat the above sampling procedure one more time.
6. For smaller measurements less than 10 ppm, repeat the above sampling procedure two more times until the stain reaches the first calibration mark.
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t
7. Read concentration level at the interface where the stained reagent meets the unstained reagent.
8. If temperature correction is necessary, obtain the true concentration by using the temperature correction table. Afterwards multiply the correction factor of pump stroke if necessary.
9. If pressure correction is necessary, use the pressure correction formula.
INTERFERENCES :
Substance
Ammonia
Sulphur dioxide
Acetaldehvde
Acetone
Methyl ethyl ketone
Concentration Interference Chanaes colour bv itself to
No discolouration
~1/5
~1/5
~1/1
~3times
+
+
+
+
No discolouration
Red
Red
Red
This table of interference gases primarily expresses the interference of each coexisting gas in the gas concentration range, that is equivalent to the gas concentration. Therefore, the test result may give a positive result from other substances not listed in the table. If more information is needed, please contact us or your Gastec representatives.
DANGEROUS HAZARDOUS PROPERTIES :
Threshold Limit Value Ceiling by ACGIH (2018): 0.1 ppm
INSTRUCTIONS ON DISPOSAL :
The reagent of the tube does not use toxic substance. When disposing the tube regardless of whether it has been used or not, follow the rules and regulations of your local government.
WARRANTY:
If you have any questions regarding gas detection and quality of the tubes, please feel free to contact your Gastec representatives.
IM0093E2
Printed in Japan
1981Z
Manufacturer : Gastec Corporation
8-8-6 Fukayanaka, Ayase-City, Kanagawa 252-1195, Japan https://www .gastec.co. jp/
Telephone +81-467-79-3910 Facsimile +81-467-79-3979
