Gastec 159L 便携式气体检测管四氢呋喃检测管C4H8O（5~232ppm）

制造商: Gastec
Model: 159L
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技术规格
制造商消息

Indicator: 5 to 80 ppm
Measuring Range:
+ 5 to 80 ppm, Number of Pump Strokes 1
+ 80 to 232 ppm, Number of Pump Strokes 1/2
Sampling Time: 2 minute per pump stroke
Colour Change: Pale yellow　→　Pale blue
Reaction Principle: C4H8O + Cr6+ + H3PO4 → Cr3+
Coefficient of Variation: 10% (for 5 to 10 ppm), 5% (for 10 to 80 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Details

Performance

Measuring Range

5 to 80 ppm

80 to 232 ppm

Number of Pump Strokes

Correction Factor

Sampling Time

2 minutes per pump stroke

Detecting Limit

1.4 ppm (n=1)

Colour Change

Pale yellow　→　Pale blue

Reaction Principle

C4H8O + Cr⁶⁺ + H3PO4 → Cr³⁺

Coefficient of Variation

10% (for 5 to 10 ppm), 5% (for 10 to 80 ppm)

Shelf Life

1 Years

Corrections for temperature & humidity

Temperature correction is necessary

Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.

Possible coexisting substances and their interferences (NOTE)

Substance

Concentration

Interference

Change colour by itself to

Acrolein	30ppm	+	Pink when 30ppm or higher
Acetone	200ppm	No	Pink when 200ppm or higher
Acetic Acid	200ppm	No	No discolouration up to 400 ppm
Ethyl Acetate	1ppm	+	Pink when 2ppm or higher
Diethyl Ether	1ppm	+	Pale blue
Trichloroethylene	100ppm	No	Pink when 100ppm or higher
Toluene	1ppm	+	White when 4ppm or higher
n-Hexane	10ppm	Unclear demarcation	Pink when 10ppm or higher
Benzen	100ppm	No	White when 500ppm or higher
Methanol	2ppm	+	Pink when 5ppm or higher Pale blue when 9ppm or higher
Methyl Ethyl Ketone	2ppm	+	Pink when 3ppm or higher