日本KITAGAWA北川式甲基環己醇CH3C6H10OH氣體檢測管199U METHYL CYCLOHEXANOL 5-200ppm

Tube 99U

1. PERFORMANCE
1） Measuring range ：5-200 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 ：10～40℃
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：10％
3. CHEMICAL REACTION
Chromium oxide is reduced.
CH3C6H10OH＋Cr6＋＋H2SO4→Cr3＋
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
5
15
20
40
60
80
100
150
200
ppm
300ml
GAS To pump
DEHUMIDIFIER
（White）
199U METHYL CYCLOHEXANOL
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
150
200
50
100
Ethanol〔ppm〕?
FIG.1 Influence of Ethanol
Methyl cyclohexanol
indicating value 〔ppm〕
50 100 150
25
Coexistence
Interference
TEMPERATURE CORRECTION TABLE
Scale True Concentration （ppm）
Readings 10℃ 20℃ 30℃ 40℃
（ppm） （50°F） （68°F） （86°F） （104°F）
200 － 200 110 65
150 － 150 85 52
100 － 100 60 40
80 170 80 50 30
60 110 60 35 25
40 70 40 25 15
20 40 20 15 10
10 20 10 7 5
5 10 5 4 3