總烴氣體檢測管187S GENERAL HYDROCARBONS 50-1400ppm

Tube No.
137
1. PERFORMANCE
1） Measuring range ：50-1,400 ppm（as n-Hexane）
Number of pump strokes 1（100ml）
2 pump strokes（200ml）are required for Kerosine and Mineral tupentine
determination.
2） Sampling time ：1.5 minutes/1 pump stroke
3） Detectable limit ：5 ppm
4） Shelf life ：2 years
5） Operating temperature ：0～40℃
6） Temperature compensation ：Necessary（refer to "Table 2. Temperature CorrectionTable"）
7） Reading ：Direct reading from the scale calibrated by 1 pump stroke
8） Colour change ：Orange→Yellowish green
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：5％　RSD-high：5％（Controlled on n-Hexane）
3. CHEMICAL REACTION
Chromium oxide is reduced.
CH3（CH2）4CH3＋Cr6＋＋H2SO4→Cr3＋
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
1400
1200
1000
800
600
400
200
100
50
ppm
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187S GENERAL HYDROCARBONS
Substance Interference Coexistence
The bottom of the discoloured
Aromatic hydrocarbons layer is changed to Black and
higher readings are given.
It has no influence on readings even if Alcohols, Esters or Ketones each co-exists up to 6％.
（NOTE）
1）Determine the concentration of objective gas by multiplication with the figure shown in Table 1 after
temperature correction.
Example）For measuring Heptane at 10℃ of temperature
Reading concentration ：600 ppm
Concentration on temperature correction ：660 ppm
Concentration of Heptane ：990 ppm
Table.2 Temperature Correction Table （20℃standard）
Readings 0℃ 10℃ 20℃ 30℃ 40℃
1400 1630 1530 1400 1270 1180
1200 1400 1320 1200 1090 1010
1000 1170 1100 1000 910 840
800 930 870 800 720 670
600 700 660 600 550 500
400 460 430 400 360 330
200 220 210 200 180 170
100 100 100 100 100 100
Unit：ppm
Name of Gas Figure Name of Gas Figure
Isobutane 0.8 Heptane 1.5
Pentane 0.8 Octane 2.0
n-Hexane 1.0 Cyclohexane 1.0
Table.1 Coefficient Chart