乙酸異丙酯/醋酸異丙酯氣體檢測(cè)管139SB 0.01-1.2%

Tube 39SB
1. PERFORMANCE
1） Measuring range ：0.01-1.4％
Number of pump strokes 2（200ml）
2） Sampling time ：4 minutes/2 pump strokes
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 Isobutyl acetate concentration is determined by using a conversion chart.
7） Colour change ：Orange→Pale brownish green
2. RELATIVE STANDARD DEVIATION
RSD-low：15％　RSD-mid.：10％　RSD-high：5％
3. CHEMICAL REACTION
Potassium dichromate is reduced
CH3CO2CH2CH（CH3）2＋Cr6＋＋H2SO4→Cr3＋
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
1.4
1.2
1.0
0.8
0.6
0.4
0.3
0.2
0.1
0.05
0.01
%
139SB C ISOBUTYL ACETATE
39SB Tube reading （％）?
Isobutyl acetate（％）?
1.0
0.8
0.6
1.4
1.2
0.4
0.2
0.1
0.05
0.01 0.01
0.1
0.2
0.5
1.0
1.4
（200mR）?
Substance Interference ppm Coexistence
Acetylene 3％ Whole reagent is changed to Pale
brown.
Propane 0.2％ 〃
Other organic gases or vapours Similar stain is produced.
except Halogenated hydrocar- 50 Higher readings are given.