苯酚C6H5OH氣體檢測管183U PHENOL 0.5-25.0ppm 返回列表頁

苯酚C6H5OH氣體檢測管183U PHENOL 0.5-25.0ppm

1. PERFORMANCE
1） Measuring range ：0.5-25.0 ppm
Number of pump strokes 2（200ml）
2） Sampling time ：3 minutes/2 pump strokes
3） Detectable limit ：0.3 ppm
4） Shelf life ：2 years
5） Operating temperature ：10～40℃
6） Temperature compensation ：Necessary（See "TEMPERATURE CORRECTION TABLE"）
7） Reading ：Direct reading from the scale calibrated by 2 pump strokes
8） Colour change ：Pale yellow→Pale brown
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：5％　RSD-high：5％
3. CHEMICAL REACTION
Cresol is oxidized and the polymer is produced.
CH3C6H4OH＋Ce4＋→CH3C6H4O→（CH3C6H4O）n
4. CALIBRATION OF THE TUBE
ABSORPTIOMETRIC METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
25.0
20.0
15.0
10.0
5.0
3.0
1.0
0.5
ppm
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Tube No.
183U CRESOL
88
Substance Interference ppm Coexistence
Phenols FIG.1 Similar stain is produced. 2.5 Higher readings are given.
Ammonia White stain is produced. 200 Discolouration of gas inlet side is
FIG.2 faded and higher reading are given.
Aliphatic amines 〃50 〃
Two layers discolouration of Pale
Aromatic amines Blue stain is produced. 50 brown and blue are produced and
higher reading are given.
（NOTE）
This tube scale is calibrated based on Phenol and the same scale is available for Cresol.
0
5
15
10
Phenol〔ppm〕?
FIG.1 Influence of Phenol
Cresol indicating value 〔ppm〕
5 0
5
15
10
Ammonia〔ppm〕?
FIG.2 Influence of Ammonia
Cresol indicating value 〔ppm〕
100 200
TEMPERATURE CORRECTION TABLE
Scale True Concentration （ppm）
Readings 10℃ 15℃ 20℃ 30℃ 40℃
（ppm） （50°F） （59°F） （68°F） （95°F） （104°F）
25.0 31.2 27.8 25.0 21.8 18.8
20.0 24.5 22.3 20.0 17.5 15.0
15.0 18.4 16.7 15.0 13.1 11.3
10.0 12.3 11.1 10.0 8.8 7.5
5.0 6.1 5.6 5.0 4.4 3.8
3.0 3.7 3.3 3.0 2.6 2.3
1.0 1.2 1.1 1.0 0.9 0.8
0.5 0.5 0.5 0.5 0.5 0.5