醋酸异丁酯CH3CO2CH2CH（CH3）2气体检测管139SB ISOBUTYL ACETATE 0.01-1.4%

Tube 39SB
1. PERFORMANCE
1） Measuring range ：0.01-1.4％
Number of pump strokes 2（200ml）
2） Sampling time ：1.5 minutes/1 pump stroke
3） Detectable limit ：10 ppm
4） Shelf life ：3 years
5） Operating temperature ：0～40℃
6） Reading ：Graduations printed on the tube are calibrated by Methyl ethyl ketone at 2 pump
strokes and Propyl acetate concentration is determined by using a conversion chart.
7） Colour change ：Orange→Brownish green
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：5％　RSD-high：5％
3. CHEMICAL REACTION
Potassium dichromate is reduced.
CH3CO2（CH2）2CH3＋Cr6＋＋H2SO4→Cr3＋
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
1.4
1.2
1.0
0.8
0.6
0.2
0.1
0.05
0.01
%
GAS To pump
139SB C PROPYL ACETATE
Substance Interference ppm Coexistence
Acetylene 3％ Whole reagent is changed to Brown.
Propane 0.2％ 〃
Other organic gases or vapours
except Halogenated hydrocar- Similar stain is produced. Higher readings are given.
bons
Propyl acetate（％）�
39SB Tube reading（％）�
（200ml）�
0.01
0.05
0.1
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0.01
0.1
0.2
0.5
1.0
1.4