異丁烯（CH3）2C=CH2氣體檢測管113SB ISOBUTYLENE 0.03-2.0%

Tube 13SB
1. PERFORMANCE
1） Measuring range ：50-1,000 ppm
Number of pump strokes 1（100ml）
2） Sampling time ：1.5 minutes/1 pump stroke
3） Detectable limit ：10 ppm
4） Shelf life ：2 years
5） Operating temperature ：0～40℃
6） Reading ：Graduations printed on the tube are calibrated by Hexane at 1 pump stroke
and Pentane concentration is determined by using a conversion chart.
7） Colour change ：Orange→Yellowish green
2. RELATIVE STANDARD DEVIATION
RSD-low:10％　RSD-mid.：10％　RSD-high：5％
3. CHEMICAL REACTION
CH3（CH2）3CH3＋Cr6＋＋H2SO4→Cr3＋
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
250
400
600
800
1000
1200
1400
100
50
ppm
GAS To pump
113SB C PENTANE
0
500
Benzene〔ppm〕?
FIG.1 Influence of Benzene
Pentane indicating value 〔ppm〕
50 100 0
500
Toluene〔ppm〕?
FIG.2 Influence of Toluene
Pentane indicating value 〔ppm〕
50 100 150
Pentane concentration（ppm）?
13SB Tube reading（ppm）?
（100mR）?
50
100
200
400
600
800
1000
1200
1400
50
100
200
400
600
800
1000
Substance Interference ppm Coexistence
Alcohols Similar stain is produced. 6％ Higher readings are given.
Ketones 〃〃〃
Esters 〃〃〃
Aromatic hydrocarbons 〃The bottom of the discoloured layer is stain-
FIG.1,2 ed to Black and higher readings are given.
Paraffin （morefi nth Haynd Cro3）carbons 〃Higher readings are given.