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室內空氣甲醛檢測管No.713 FORMALDEHYDE 0.01-0
氯乙烯CH2=CHCl氣體測毒管132SC VINYL CHLORID
氯乙烯CH2=CHCl氣體檢知管132SB VINYL CHLORID
乙酸異戊酯氣體檢測管188U ISOPENTYL ACETATE 10-400ppm
Tube 88U
1. PERFORMANCE
1) Measuring range :10-400 ppm
Number of pump strokes 1(100ml)
2) Sampling time :1.5 minutes/1 pump stroke
3) Detectable limit :4 ppm
4) Shelf life :1 year
5) Operating temperature :10~40℃
6) Temperature compensation :Necessary(See "TEMPERATURE CORRECTION TABLE")
7) Reading :Direct reading from the scale calibrated by 1 pump stroke
8) Colour change :Pale yellow→Pale blue(The top of discoloured layer is Brown, but read at the
top of Pale blue.)
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:5% RSD-high:5%
3. CHEMICAL REACTION
Potassium dichromate is reduced
CH3CO2(CH2)2CH(CH3)2+Cr6++H2SO4→Cr3+
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
400
300
200
150
100
50
30
10
100ml
ppm
DEHUMIDIFIER
(White)
????????
188U ISOPENTYL ACETATE
Substance Interference Coexistence
Esters Similar stain is produced. Higher readings are given.
Alcohols FIG.1 〃〃
Ketones 〃〃
Aromatic hydrocarbons Whole reagent is changed to Pale brown. 〃
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 10℃ 15℃ 20℃ 25℃ 30℃ 35℃ 40℃
(ppm) (50°F) (59°F) (68°F) (77°F) (86°F) (95°F) (104°F)
400 - - 400 240 190 160 140
300 - - 300 200 160 140 120
200 - 360 200 150 125 110 95
150 - 230 150 120 100 90 80
100 - 135 100 85 75 67 60
50 80 60 50 45 40 35 35
30 40 35 30 30 25 25 25
10 10 10 10 10 10 10 10
0
300
400
100
200
50
Methanol〔ppm〕?
FIG.1 Influence of Methanol
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