Gastec 193 便携式气体检测管2-戊烯腈检测管（CH3CH2CH：CHCN）（0.5~15ppm）

Name: Gastec 193 便携式气体检测管2-戊烯腈检测管（CH3CH2CH：CHCN）（0.5~15ppm）
Brand: Gastec

制造商Gastec(查看更多该品牌的产品)

Model193

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Indicator: 0.5 to 6.0 ppm
Measuring Range:
+ 0.5 to 6.0 ppm, Number of Pump Strokes 4
+ 6.0 to 15 ppm, Number of Pump Strokes 2
Sampling Time: 2 minute per pump stroke
Colour Change: Yellow → Red
Reaction Principle:
+ CH3CH2CH:CHCN + Cr6+ + H2SO4 → HCN
+ 2HCN+HgCl2 → 2HCl+ Hg(CN)2
+ HCl+Base → Chloride.
Coefficient of Variation: 10% (for 0.5 to 2 ppm), 5% (for 2 to 6 ppm)
Nr. of tests: 5
Pump: GV-100S/110S

Catalog

Manual

Performance

Measuring Range

0.5 to 6.0 ppm

6.0 to 15 ppm

Number of Pump Strokes

Correction Factor

2.5

Sampling Time

2 minutes per pump stroke

Detecting Limit

0.1 ppm(n=4)

Colour Change

Yellow → Red

Reaction Principle

CH3CH2CH:CHCN + Cr⁶⁺ + H2SO4 → HCN
2HCN+HgCl2 → 2HCl+ Hg(CN)2
HCl+Base → Chloride.

Coefficient of Variation

10% (for 0.5 to 2 ppm), 5% (for 2 to 6 ppm)

Shelf Life

3 Years

Corrections for temperature & humidity

Temperature correction is necessary

Store the tubes at cool and dark place.

Possible coexisting substances and their interferences (NOTE)

Substance

Concentration

Interference

Change colour by itself to

Hydrogen chloride		No	No
Hydrogen cyanide		No	No
Nitriles (C3)		+	Red
Acetone cyanohidrin		+	Red
Alcohols, Esters, Ketones	20 ppm or higher		No
Aromatic hydrocarbons	20 ppm or higher		No
Note: Humidity scrubber removes humidity and acid gases.

Calibration gas generation

Diffusion tube method

TLV-TWA	TLV-STEL	Explosive range
-	-	-

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