Gastec 141L 便携式气体检测管醋酸乙酯检测管 CH3CO2C2H5 （20~800 ppm）

制造商: Gastec
Model: 141L
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技术规格
制造商消息

Indicator: 20 to 800 ppm
Measuring Range: 20 to 800 ppm, Number of Pump Strokes 2
Sampling Time: 2 minute per pump stroke
Colour Change: Yellow → Blackish brown → Light blue after few minute
Reaction Principle: CH3CO2C2H5 + Cr6+ + H2SO4 → Cr3+
Coefficient of Variation: 15% (for 20 to 200 ppm), 10% (for 200 to 800 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Details

Performance

Measuring Range	20 to 800 ppm
Number of Pump Strokes	2
Correction Factor	1
Sampling Time	2 minutes per pump stroke
Detecting Limit	5 ppm (n=2)
Colour Change	Yellow → Blackish brown → Light blue after few minute
Reaction Principle	CH3CO2C2H5 + Cr⁶⁺ + H2SO4 → Cr³⁺
Coefficient of Variation	15% (for 20 to 200 ppm), 10% (for 200 to 800 ppm)
Shelf Life	2 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

Alcohols	+	Dark green
Ketones	+	Dark green
Esters	+	Dark green
Aromatic HCs	+	Dark green

Other substance measurable with this detector tube

Substance

Correction Factor

No. of pump strokes

Measuring Range

Cymene	Factor: 0.28	2	5.6 to 224 ppm
Diisopropyl benzene	Factor: 0.5	1/2	10 to 400 ppm
Ethyl acrylate	Factor: 0.4	2	8 to 320 ppm
2-Hexyl alcohol	Factor: 3.0	3	60 to 2400 ppm
Isopropyl ether	Factor: 0.9	2	18 to 720 ppm
Mesityl oxide	Factor: 1.35	2	27 to 1080 ppm
Methyl acrylate	Factor: 0.4	2	8 to 320 ppm
Methyl Isothiocyanate	by scale	2	50 to 400 ppm