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日本KITAGAWA北川式甲乙酮CH3COC2H5气体检测管122SA METHYL ETHYL KETONE 0.05-5.0%
Tube 22SA
1. PERFORMANCE
1) Measuring range :1.0-5.0% 0.05-2.2%
Number of pump strokes 1/2(50ml) 1(100ml)
2) Sampling time :1.5 minutes/1 pump stroke
3) Detectable limit :50 ppm
4) Shelf life :3 years
5) Operating temperature :0~40℃
6) Reading :Graduations printed on the tube are calibrated by Ethylene oxide at 1 pump stroke
and Methyl ethyl ketone is determined by using a conversion chart.
7) Colour change :Orange→Dark brown
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:5% RSD-high:5%
3. CHEMICAL REACTION
Potassium dichromate is reduced.
CH3COC2H5+Cr6++H2SO4→Cr3+
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
(White)
DEHUMIDIFIER
GAS To pump
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.1
0.01
%
122SA C METHYL ETHYL KETONE
Substance Interference ppm Coexistence
Alcohols FIG.1 Similar stain is produced. Higher readings are given.
Esters FIG.2 〃〃
Ketones 〃〃
Aromatic hydrocarbons 〃〃
Halogenated hydrocarbons WPahleo leb rsotwainn. is discoloured to 0.5% 〃
(NOTE)
In case 1 / 2 pump stroke, following conversion scale is available for the actual concentration.
0
1.0
1.5
Methanol〔%〕�
FIG.1 Influence of Methanol
Methyl ethyl ketone
indicating value 〔%〕 0.5 1.0
0.5
0
1.0
1.5
Ethyl acetate〔%〕�
FIG.2 Influence of Ethyl acetate
Methyl ethyl ketone
indicating value 〔%〕
0.5 1.0
0.5
0.05
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.1
5.0
4.0
3.0
2.0
1.0
Conversion
scale
(50ml actual value)�
(100mlconcentration scale)� (
%)�
0.01
0.1
0.2
0.4
1.0
1.6
1.8 2.2
2.0
1.0
1.5
0.5
0.1
0.05
Methyl Ethyl Ketone(%)�
22SA Tube reading(%)�
(100mR)�
0.6
0.8
1.2
1.4
TEMPERATURE CORRECTION TABLE
Conversion Corrected Concentration (ppm)
Value 0℃ 10℃ 20℃ 30℃ 40℃
(%) (32°F) (50°F) (68°F) (86°F) (104°F)
2.5 - 2.88 2.50 2.34 2.26
2.0 2.70 2.30 2.00 1.84 1.76
1.5 2.36 1.74 1.50 1.35 1.26
1.0 1.52 1.16 1.00 0.88 0.80
0.5 0.70 0.58 0.50 0.42 0.38
0.1 0.14 0.12 0.10 0.08 0.06
0.05 0.07 0.05 0.05 0.03 0.03
0.01 0.01 0.01 0.01 0.01 0.01
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