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  • 产品名称:甲基溴检测管136L Methyl bromideCH3Br

  • 产品型号:136L
  • 产品厂商:日本GASTEC
  • 产品文档:
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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 3 minutes per pump,甲基溴检测管价格
详情介绍:

 

甲基溴检测管136L Methyl bromideCH3Br
Methylbromide                No.136L

CH3Br

甲基溴检测管136L Methyl bromideCH3Br

Performance
 

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 ofVariation10% (for10 to 20 ppm), 5% (for 20 to 100 ppm)
ShelfLife2Years
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 bromide

Tube 136L Reading(n=1)

10

20

40

60

80

100

Benzyl Bromide Conc.(ppm)

25

75

180

350

580

850


Bromform

Tube 136L Reading(n=1)

10

20

40

60

80

100

Bromform Conc.(ppm)

1

4

12

24

37

50



Calibration gasgenerationDiffusion tubemethod


 


TLV-TWATLV-STELExplosive range
1 ppm-10 to 15%
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