日本KITAGAWA北川式甲基環己酮CH3C6H9O氣體檢測管198U METHYL CYCLOHEXANONE 2-100ppm

Tube 98U
1. PERFORMANCE
1） Measuring range ：2-100 ppm
Number of pump strokes 3（300ml）
2） Sampling time ：4.5 minutes/3 pump strokes
3） Detectable limit ：1 ppm
4） Shelf life ：2 years
5） Operating temperature ：0～40℃
6） Temperature compensation ：Necessary（See "TEMPERATURE CORRECTION TABLE"）
7） Reading ：Direct reading from the scale calibrated by 3 pump strokes
8） Colour change ：Yellow→Pale blue
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：10％　RSD-high：5％
3. CHEMICAL REACTION
Chromium oxide is reduced.
CH3C6H9＋Cr6＋＋H2SO4→Cr3＋
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
2
10
20
40
60
80
100
ppm
300ml
GAS To pump
DEHUMIDIFIER
（White）
198U METHYL CYCLOHEXANONE
Substance Interference Coexistence
Aliphatic hydrocarbons Whole reagent is changed to Pale The accuracy of readings is not
brown. affected.
Aromatic hydrocarbons 〃〃
Halogenated hydrocarbons 〃〃
Alcohols FIG.1 Similar stain is produced. Higher readings are given.
Esters Pale ringed stain is produced near The accuracy of readings is not
the bottom of the reagent. affected.
0
70
100
30
50
Ethanol〔ppm〕?
FIG.1 Influence of Ethanol
Methyl cyclohexanone
indicating value 〔ppm〕
50 100 150
10
Coexistence
Interference
TEMPERATURE CORRECTION TABLE
Scale True Concentration （ppm）
Readings 10℃ 20℃ 30℃ 40℃
（ppm） （50°F） （68°F） （86°F） （104°F）
100 130 100 80 66
80 105 80 65 52
60 80 60 48 36
40 54 40 30 22
20 26 20 14 10
10 14 10 7 5