日本KITAGAWA北川式甲乙酮气体检测管139SB METHYL ETHYL KETONE 0.01-1.4% Tube No.139SB
1. PERFORMANCE 1) Measuring range :0.01-1.4% Number of pump strokes 2(200ml) 2) Sampling time :3 minutes/2 pump strokes 3) Detectable limit :10 ppm 4) Shelf life :3 years 5) Operating temperature :0~40℃ 6) Reading :Direct reading from the scale calibrated by 2 pump strokes 7) Colour change :Orange→Brownish green 2. RELATIVE STANDARD DEVIATION RSD-low:10% RSD-mid.:5% RSD-high:5% 3. CHEMICAL REACTION Potassium dichromate is reduced. CH3COC2H5+Cr6++H2SO4→Cr3+ 4. CALIBRATION OF THE TUBE GAS CHROMATOGRAPHY 5. INTERFERENCE AND CROSS SENSITIVITY 0.01 0.05 0.1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 % 200ml GAS To pump 139SB METHYL ETHYL KETONE Substance Interference ppm Coexistence Whole reagent is discoloured to Acetylene 3% Brown and higher readings are given. Propane 0.2% 〃 Other organic gases or vapours . except Halogenated hydrocar- Similar stain is produced 50 Higher readings are given. bons |