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GAS151D Acetone Passive Dosi-Tube 5 – 1500ppm
GAS151D Acetone Gastec Passive Sampling Dosi Tubes (Time Weighted Average Detector Tubes)
The Dosi-Tube System allows an operator to evaluate the level of gas a worker is exposed to over a time period such as a working shift.
The Dosi-Tube is easily clipped into the Dosi-tube holder (GAS710) which is worn on a garment of clothing.
|Measuring Range||5 to 1500 ppm|
|Sampling Hours||1 to 10 hours|
|Detecting Limit||5ppm (10 hours)|
|Colour Change||Yellow Reddish Brown|
|Reaction Principle||Acetone reacts with Hydroxylamine Phosphate to liberate Phosphorus Acid, which discolours pH indicator to reddish brown.
3CH3COCH3 + (NH2OH)3H3PO4 H3PO4
|Coefficient of Variation||10% (for 50 to 1500 ppm∙hr)|
|Shelf Life||Up to 2 years from point of manufacture|
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|
|Substance||Concentration||Interference||Change colour by itself|
|Aldehydes, Ketones||–||Plus error||Discolours reddish brown|
|Acid gases||–||Plus error||Discolours reddish brown
|Other substance measurable with this detector tube|
|Name of Substance||Correction Factor||Measuring Range|
|Methyl Ethyl Ketone||1.3||6.5 to 1950 ppm|
|Methyl Isobutyl Ketone||2.3||11.5 to 3450 ppm|
|Acetaldehyde||0.8||4 to 1200 ppm|
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