当前位置:上海境宣实业有限公司>>日本光明北川式气体检测管>>气体快速检测管>> 102SA四氢呋喃(CH2)4O气体检测管102SA TETRAHYDROFURAN 0.2-5.0%
四氢呋喃(CH2)4O气体检测管102SA TETRAHYDROFURAN 0.2-5.0%
1. PERFORMANCE
1) Measuring range :2.0-5.0% 0.2-3.0%
Number of pump strokes 1/2(50ml) 1(100ml)
2) Sampling time :1.5 minutes/1 pump stroke
3) Detectable limit :20 ppm
4) Shelf life :3 years
5) Operating temperature :0~40℃
6) Temperature compensation :Necessary(See "TEMPERATURE CORRECTION TABLE")
7) Reading :Graduations printed on the tube are calibrated by Acetone at 1 pump stroke and
Tetrahydrofuran is determined by using a conversion chart.
8) Colour change :Orange→Dark brown
2. RELATIVE STANDARD DEVIATION
RSD-low:15% RSD-mid.:10% RSD-high:5%
3. CHEMICAL REACTION
Potassium dichromate is reduced.
CH2-CH2
O+Cr6++H2SO4→Cr3+
CH2-CH2
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
0.1
0.2
0.5
1.0
1.5
2.0
%
GAS To pump
Tube No.
102SA C TETRAHYDROFURAN
Substance Interference ppm Coexistence
Alcohols Similar stain is produced. Higher readings are given.
Atromatic hydrocarbons FIG.1 〃〃
Ketones 〃〃
Esters FIG.2 〃〃
Halogenated hydrocarbons WPahleo leb rroewang.ent is changed to 0.5% 〃
(NOTE)
In case of 1 / 2 pump stroke, following conversion scale is available for actual concentration.
0
2
3
1
Toluene〔%〕�
FIG.1 Influence of Toluene
Tetra-hydrofuran
indicating value 〔%〕
Tetra-hydrofuran
indicating value 〔%〕
1 2
Interference
0
2
3
1
Ethyl acetate〔%〕�
FIG.2 Influence of Ethyl acetate
1 2
0.1 0.2
0.2
0.5
1.0
1.5
2.0
0.5
1.0
1.5
2.0
2.5
3.0
Tetrahydrofuran concentration(%)�
02SA tude reading(%)�
(100mR)�
0.1
0.2
0.5
1.0
1.5
2.0
2.0
3.0
4.0
5.0
Tetrahydrofuran concentration(%)�
02SA tude reading(%)�
(50mR)�
TEMPERATURE CORRECTION TABLE
Scale True Concentration (%)
Readings 0℃ 10℃ 20℃ 30℃ 40℃
(%) (32°F) (50°F) (68°F) (86°F) (104°F)
3.0 - 3.2 3.0 2.8 2.7
2.5 3.0 2.7 2.5 2.4 2.2
2.0 2.4 2.1 2.0 1.9 1.8
1.5 1.8 1.6 1.5 1.4 1.3
1.0 1.1 1.1 1.0 1.0 0.9
0.5 0.6 0.5 0.5 0.5 0.5
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