简单介绍： 甲基溴检测管136l methyl bromidech3br，measuring range 2.5 to 10 ppm 10 to 100 ppm 100 to 200 ppm number of pump strokes 4 1 1/2 correction factor 1/4 1 2 sampling time ......
甲基溴检测管136l methyl bromidech3br 产品详情
详情介绍：
甲基溴检测管136l methyl bromidech3br
methylbromide36lch3brperformance
measuringrange
2.5 to 10 ppm
10 to 100 ppm
100 to 200 ppm
number of pump strokes
4
1
1/2
correctionfactor
1/4
1
2
samplingtime
3 minutes per pumpstroke
detectinglimit
0.5 ppm (n=4)
colorchange
white → yellow
reactionprinciple
2ch3br +i2o5+ h2s2o7 → br 2
br 2 +o-tolidine → yellow product
coefficient ofvariation 10% (for10 to 20 ppm), 5% (for 20 to 100 ppm)
shelflife 2years
corrections for
temperature & humidity unnecessary
store the tubes at cool and darkplace.
possible coexisting substances and theirinterferences (note)
substance
concentration
interference
change color by itself
chlorine, bromine,nox
- plus error
produce yellowstain
saturatedhalogenated hydrocarbons
- plus error
produce yellowstain
othersubstance measurable with this detector tube
substance
correction factor
pump strokes
measuring range
chlorobromomethane
0.9
1
9 to 90 ppm
1,1-dibromoethane
0.7
1
7 to 70 ppm
1,2-dibromoethane
0.8
1
8 to 80 ppm
dibromomethane
0.5
1
5 to 50 ppm
ethyl bromide
1.0
1/2, 1, 4
2.5 to 200 ppm
n-butylbromide
1.0
1
1 to 100ppm
benzyl bromidetube 136l reading(n=1)
10
20
40
60
80
100
benzyl bromide conc.(ppm)
25
75
180
350
580
850
bromformtube 136l reading(n=1)
10
20
40
60
80
100
bromform conc.(ppm)
1
4
12
24
37
50
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
1 ppm - 10 to 15%