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关 键 词：152D
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发布时间：2010-12-20
Methyl ethyl ketone No.152D CH3COC2H5 Performance Measuring Range 2 to 600 ppm Sampling Hours 1 to 10 hours Detecting Limit 5 ppm (10 hours) Color Change Yellow → Reddish Brown Reaction Principle CH3COCH3 + (NH2OH)3H3PO4 → H3PO4 H3PO4 + Base → Phosphate Coefficient of Variation 10% (for 20 to 600 ppm-hr) Shelf Life 2 Year 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 Interference Change colour by itself to Aldehydes + Reddish brown Ketones + Reddish brown Acid gases + Reddish brown (Unclear demarcation) Other substance measurable with this detector tube Substance Correction Factor Measuring Range Acetone 0.7 1.4 to 420 ppm Methyl isobutyl ketone 2.0 4 to 1200 ppm Acetaldehyde 0.6 1.2 to 360 ppm Calibration gas generation Diffusion tube method TLV-TWA TLV-STEL Explosive range 200 ppm 300 ppm 1.7 to 11.4%
