异丙叉丙酮CH3COCH=C（CH3）2气体检测管190U MESITYL OXIDE 5-100ppm

Tube 90U

GAS To pump
500
400
100
50
20
5
300
200
150
300ml
ppm
（White）
DEHUMIDIFIER
1. PERFORMANCE
1） Measuring range ：5-100 ppm
Number of pump strokes 2（200ml）
2） Sampling time ：3 minutes/2 pump strokes
3） Detectable limit ：1 ppm
4） Shelf life ：2 years
5） Operating temperature ：0～40℃
6） Temperature compensation ：Necessary（See "TEMPERATURE CORRECTION TABLE"）
7） Reading ：Graduations printed on the tube are calibrated by Ethyl cellosolve at 3 pump strokes
and Mesityl oxide is determined by using a conversion chart.
8） Colour change ：Yellow→Pale blue
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：10％　RSD-high：10％
3. CHEMICAL REACTION
Chromium oxide is reduced.
CH3COCH＝C（CH3）2＋Cr6＋＋H2SO4→Cr3＋
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
190U C MESITYL OXIDE
TEMPERATURE CORRECTION TABLE
Conver. Corrected Concentration （ppm）
value 0℃ 10℃ 20℃～40℃
（ppm） （32°F） （50°F） （68°F） （104°F）
100 － － 100
80 － 95 80
60 100 70 60
40 60 45 40
20 30 25 20
10 15 12 10
5 7 6 5
Substance ppm Interference ppm Coexistence
Alcohols Similar stain is produced. Higher readings are given.
Toluene 200 Whole reagent is discoloured 500 The top of discoloured layer
to Brown. becomes unclear.
Hexane The accracy of reading is not less than The accracy of reading is not
affected. 1,000ppm affected.
Ethyl Acetate 〃〃
Trichloroethylene 〃〃
90U Tube reading （ppm）�
（200mR）�
Mesityl oxide（ppm）�
500
400
300
200
100
50
20
5
5
40
60
10
20
80
100