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甲酚C6H4(CH3)(OH)氣體檢測管183U CRESOL 0.5-25.0ppm，便攜式臭氧檢測系統(tǒng)：在不用任何能源、電源的情況下，1分鐘內(nèi)即可快速檢測出環(huán)境中的臭氧濃度，具有操作簡單、攜帶方便等特點。包括：臭氧氣體檢測管（檢測范圍：4-400ppm）、手動采樣器、5米延長采樣管、便攜式儀器箱
更新時間：2025-01-08
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甲酚C6H4（CH3）（OH）氣體檢測管183U CRESOL 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
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
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