1,4-二氧己環氣體檢測管139SB 1,4-DIOXANE （+）C4H8O2 0.05-2.5%

Tube No.
1. PERFORMANCE
1） Measuring range ：0.05-2.5％
Number of pump strokes 2（200ml）
2） Sampling time ：3 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 1,4-Dioxane 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.
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
1.2
1.4
1.0
0.8
0.6
0.4
0.2
0.1
0.05
0.01
%
139SB C 1, 4-DIOXANE
O O＋Cr6＋＋H2SO4→CH2CH2 Cr3＋
CH2CH2
Substance Interference ppm Coexistence
Acetylene 3％ Whole reagent is discoloured to
Brown.
Propane 0.2％ 〃
Other organic or vapours
except Halogenated hydro- Similar stain is produced. Higher reading are given.
carbons
Dioxane（％）?
39SB Tube reading（％）?
（200mR）?
0.01
0.05
0.1
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0.05
0.1
0.2
0.5
1.0
1.5
2.0
2.5
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